{"id":34318,"date":"2025-10-18T11:16:42","date_gmt":"2025-10-18T04:16:42","guid":{"rendered":"https:\/\/interdata.vn\/blog\/?p=34318"},"modified":"2026-02-05T11:14:58","modified_gmt":"2026-02-05T04:14:58","slug":"ssid-la-gi","status":"publish","type":"post","link":"https:\/\/interdata.vn\/blog\/ssid-la-gi\/","title":{"rendered":"SSID l\u00e0 g\u00ec? Vai tr\u00f2, c\u1ea5u tr\u00fac &#038; C\u00e1ch l\u1ea5y SSID tr\u00ean \u0111i\u1ec7n tho\u1ea1i A-Z"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-white ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">N\u1ed8I DUNG<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/interdata.vn\/blog\/ssid-la-gi\/#SSID-la-gi\" >SSID l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/interdata.vn\/blog\/ssid-la-gi\/#Dac-diem-va-cau-truc-ten-Wi-Fi-SSID\" >\u0110\u1eb7c \u0111i\u1ec3m v\u00e0 c\u1ea5u tr\u00fac t\u00ean Wi-Fi SSID<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/interdata.vn\/blog\/ssid-la-gi\/#Kich-thuoc-gioi-han-cua-SSID\" >K\u00edch th\u01b0\u1edbc gi\u1edbi h\u1ea1n c\u1ee7a SSID<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/interdata.vn\/blog\/ssid-la-gi\/#Tinh-nhay-cam-voi-chu-hoa-va-chu-thuong\" >T\u00ednh nh\u1ea1y c\u1ea3m v\u1edbi ch\u1eef hoa v\u00e0 ch\u1eef th\u01b0\u1eddng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/interdata.vn\/blog\/ssid-la-gi\/#Phan-biet-BSSID-va-ESSID\" >Ph\u00e2n bi\u1ec7t BSSID v\u00e0 ESSID<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/interdata.vn\/blog\/ssid-la-gi\/#Vai-tro-cua-SSID-trong-mang-khong-day\" >Vai tr\u00f2 c\u1ee7a SSID trong m\u1ea1ng kh\u00f4ng d\u00e2y<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/interdata.vn\/blog\/ssid-la-gi\/#Vai-tro-nhan-dien-va-phan-biet-mang\" >Vai tr\u00f2 nh\u1eadn di\u1ec7n v\u00e0 ph\u00e2n bi\u1ec7t m\u1ea1ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/interdata.vn\/blog\/ssid-la-gi\/#Co-so-de-xac-thuc-va-ket-noi\" >C\u01a1 s\u1edf \u0111\u1ec3 x\u00e1c th\u1ef1c v\u00e0 k\u1ebft n\u1ed1i<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/interdata.vn\/blog\/ssid-la-gi\/#Ho-tro-tinh-nang-Roaming-Chuyen-vung\" >H\u1ed7 tr\u1ee3 t\u00ednh n\u0103ng Roaming (Chuy\u1ec3n v\u00f9ng)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/interdata.vn\/blog\/ssid-la-gi\/#Cach-hoat-dong-cua-SSID-wifi\" >C\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a SSID wifi<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/interdata.vn\/blog\/ssid-la-gi\/#Phat-song-qua-Goi-tin-Beacon\" >Ph\u00e1t s\u00f3ng qua G\u00f3i tin Beacon<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/interdata.vn\/blog\/ssid-la-gi\/#Qua-trinh-quet-cua-thiet-bi\" >Qu\u00e1 tr\u00ecnh qu\u00e9t c\u1ee7a thi\u1ebft b\u1ecb<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/interdata.vn\/blog\/ssid-la-gi\/#So-sanh-SSID-voi-cac-thong-so-mang-khac\" >So s\u00e1nh SSID v\u1edbi c\u00e1c th\u00f4ng s\u1ed1 m\u1ea1ng kh\u00e1c<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/interdata.vn\/blog\/ssid-la-gi\/#SSID-va-Mat-khau-PasswordKey\" >SSID v\u00e0 M\u1eadt kh\u1ea9u (Password\/Key)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/interdata.vn\/blog\/ssid-la-gi\/#SSID-va-Dia-chi-IP-IP-Address\" >SSID v\u00e0 \u0110\u1ecba ch\u1ec9 IP (IP Address)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/interdata.vn\/blog\/ssid-la-gi\/#SSID-va-MAC-Address-Dia-chi-MAC\" >SSID v\u00e0 MAC Address (\u0110\u1ecba ch\u1ec9 MAC)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/interdata.vn\/blog\/ssid-la-gi\/#Cach-lay-SSID-wifi-tren-dien-thoai\" >C\u00e1ch l\u1ea5y SSID wifi tr\u00ean \u0111i\u1ec7n tho\u1ea1i<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/interdata.vn\/blog\/ssid-la-gi\/#Cach-kiem-tra-SSID-WiFi-truc-tiep-tren-modem-phat-mang\" >C\u00e1ch ki\u1ec3m tra SSID WiFi tr\u1ef1c ti\u1ebfp tr\u00ean modem ph\u00e1t m\u1ea1ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/interdata.vn\/blog\/ssid-la-gi\/#Cach-lay-SSID-WiFi-bang-dia-chi-quan-tri-19216811\" >C\u00e1ch l\u1ea5y SSID WiFi b\u1eb1ng \u0111\u1ecba ch\u1ec9 qu\u1ea3n tr\u1ecb 192.168.1.1<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/interdata.vn\/blog\/ssid-la-gi\/#Cach-xem-SSID-WiFi-trong-phan-cai-dat-dien-thoai-iPhone-Android\" >C\u00e1ch xem SSID WiFi trong ph\u1ea7n c\u00e0i \u0111\u1eb7t \u0111i\u1ec7n tho\u1ea1i iPhone, Android<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/interdata.vn\/blog\/ssid-la-gi\/#Mot-so-luu-y-lien-quan-den-SSID-WiFi\" >M\u1ed9t s\u1ed1 l\u01b0u \u00fd li\u00ean quan \u0111\u1ebfn SSID WiFi:<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/interdata.vn\/blog\/ssid-la-gi\/#Cach-kiem-tra-va-doi-ten-SSID-tren-thiet-bi\" >C\u00e1ch ki\u1ec3m tra v\u00e0 \u0111\u1ed5i t\u00ean SSID tr\u00ean thi\u1ebft b\u1ecb<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/interdata.vn\/blog\/ssid-la-gi\/#Cach-kiem-tra-SSID\" >C\u00e1ch ki\u1ec3m tra SSID<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/interdata.vn\/blog\/ssid-la-gi\/#Cach-doi-ten-SSID\" >C\u00e1ch \u0111\u1ed5i t\u00ean SSID<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/interdata.vn\/blog\/ssid-la-gi\/#Rui-ro-bao-mat-lien-quan-den-SSID\" >R\u1ee7i ro b\u1ea3o m\u1eadt li\u00ean quan \u0111\u1ebfn SSID<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/interdata.vn\/blog\/ssid-la-gi\/#Tiet-lo-thong-tin-nha-cung-cap-va-mau-thiet-bi\" >Ti\u1ebft l\u1ed9 th\u00f4ng tin nh\u00e0 cung c\u1ea5p v\u00e0 m\u1eabu thi\u1ebft b\u1ecb<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/interdata.vn\/blog\/ssid-la-gi\/#Nguy-co-tiet-lo-thong-tin-ca-nhan-hoac-vi-tri\" >Nguy c\u01a1 ti\u1ebft l\u1ed9 th\u00f4ng tin c\u00e1 nh\u00e2n ho\u1eb7c v\u1ecb tr\u00ed<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/interdata.vn\/blog\/ssid-la-gi\/#Tan-cong-Wi-Fi-bang-cach-gia-mao-SSID-Evil-Twin-Attack\" >T\u1ea5n c\u00f4ng Wi-Fi b\u1eb1ng c\u00e1ch gi\u1ea3 m\u1ea1o SSID (Evil Twin Attack)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/interdata.vn\/blog\/ssid-la-gi\/#Bien-phap-nang-cao-bao-ve-mang-bang-SSID\" >Bi\u1ec7n ph\u00e1p n\u00e2ng cao b\u1ea3o v\u1ec7 m\u1ea1ng b\u1eb1ng SSID<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-30\" href=\"https:\/\/interdata.vn\/blog\/ssid-la-gi\/#Dat-ten-SSID-vo-danh-va-chuyen-nghiep\" >\u0110\u1eb7t t\u00ean SSID v\u00f4 danh v\u00e0 chuy\u00ean nghi\u1ec7p<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-31\" href=\"https:\/\/interdata.vn\/blog\/ssid-la-gi\/#Phan-tach-mang-bang-SSID-cho-mang-khach-Guest-Network\" >Ph\u00e2n t\u00e1ch m\u1ea1ng b\u1eb1ng SSID cho m\u1ea1ng kh\u00e1ch (Guest Network)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-32\" href=\"https:\/\/interdata.vn\/blog\/ssid-la-gi\/#Vo-hieu-hoa-WPS-Wi-Fi-Protected-Setup\" >V\u00f4 hi\u1ec7u h\u00f3a WPS (Wi-Fi Protected Setup)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-33\" href=\"https:\/\/interdata.vn\/blog\/ssid-la-gi\/#Co-nen-an-SSID\" >C\u00f3 n\u00ean \u1ea9n SSID?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-34\" href=\"https:\/\/interdata.vn\/blog\/ssid-la-gi\/#Ao-tuong-ve-an-toan-khi-an-SSID\" >\u1ea2o t\u01b0\u1edfng v\u1ec1 an to\u00e0n khi \u1ea9n SSID<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-35\" href=\"https:\/\/interdata.vn\/blog\/ssid-la-gi\/#Khuyen-nghi-cua-chuyen-gia-Tap-trung-vao-Ma-hoa-WPA\" >Khuy\u1ebfn ngh\u1ecb c\u1ee7a chuy\u00ean gia: T\u1eadp trung v\u00e0o M\u00e3 h\u00f3a (WPA)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-36\" href=\"https:\/\/interdata.vn\/blog\/ssid-la-gi\/#Luu-y-khi-su-dung-va-bao-ve-ID-mang-SSID\" >L\u01b0u \u00fd khi s\u1eed d\u1ee5ng v\u00e0 b\u1ea3o v\u1ec7 ID m\u1ea1ng SSID<\/a><\/li><\/ul><\/nav><\/div>\n<p>SSID Wifi l\u00e0 g\u00ec v\u00e0 t\u1ea1i sao n\u00f3 l\u1ea1i quan tr\u1ecdng khi b\u1ea1n k\u1ebft n\u1ed1i Wi-Fi? M\u1ed7i m\u1ea1ng kh\u00f4ng d\u00e2y \u0111\u1ec1u c\u00f3 m\u1ed9t m\u00e3 \u0111\u1ecbnh danh ri\u00eang \u2013 ch\u00ednh l\u00e0 SSID \u2013 gi\u00fap thi\u1ebft b\u1ecb nh\u1eadn di\u1ec7n v\u00e0 ph\u00e2n bi\u1ec7t gi\u1eefa h\u00e0ng ch\u1ee5c m\u1ea1ng xung quanh. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd gi\u00fap b\u1ea1n hi\u1ec3u r\u00f5 <a href=\"https:\/\/interdata.vn\/blog\/ssid-la-gi\/\"><strong>SSID l\u00e0 g\u00ec<\/strong><\/a>, c\u00e1ch ho\u1ea1t \u0111\u1ed9ng, vai tr\u00f2, c\u00e1ch l\u1ea5y SSID wifi tr\u00ean \u0111i\u1ec7n tho\u1ea1i chi ti\u1ebft\u2026 v\u00e0 c\u00e1c l\u01b0u \u00fd b\u1ea3o m\u1eadt quan tr\u1ecdng khi \u0111\u1eb7t t\u00ean m\u1ea1ng Wi-Fi. T\u00ecm hi\u1ec3u ngay!<\/p>\n<h2><span class=\"ez-toc-section\" id=\"SSID-la-gi\"><\/span>SSID l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>SSID (Service Set Identifier &#8211; T\u00ean m\u1ea1ng Wifi)<\/strong> l\u00e0 t\u00ean \u0111\u1ecbnh danh c\u1ee7a m\u1ed9t m\u1ea1ng kh\u00f4ng d\u00e2y (WiFi), gi\u00fap ph\u00e2n bi\u1ec7t c\u00e1c m\u1ea1ng WiFi kh\u00e1c nhau trong c\u00f9ng khu v\u1ef1c. SSID l\u00e0 m\u1ed9t chu\u1ed7i k\u00fd t\u1ef1 (t\u1ed1i \u0111a 32 k\u00fd t\u1ef1), c\u00f3 th\u1ec3 bao g\u1ed3m ch\u1eef c\u00e1i, s\u1ed1 v\u00e0 k\u00fd t\u1ef1 \u0111\u1eb7c bi\u1ec7t, do ng\u01b0\u1eddi d\u00f9ng ho\u1eb7c nh\u00e0 s\u1ea3n xu\u1ea5t \u0111\u1eb7t cho b\u1ed9 ph\u00e1t WiFi. Khi thi\u1ebft b\u1ecb t\u00ecm ki\u1ebfm m\u1ea1ng, SSID s\u1ebd hi\u1ec3n th\u1ecb trong danh s\u00e1ch c\u00e1c m\u1ea1ng kh\u1ea3 d\u1ee5ng \u0111\u1ec3 ng\u01b0\u1eddi d\u00f9ng l\u1ef1a ch\u1ecdn v\u00e0 k\u1ebft n\u1ed1i.<\/p>\n<figure id=\"attachment_34346\" aria-describedby=\"caption-attachment-34346\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-34346\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/10\/SSID-la-gi.jpg\" alt=\"SSID l\u00e0 g\u00ec\" width=\"800\" height=\"500\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/10\/SSID-la-gi.jpg 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/10\/SSID-la-gi-300x188.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/10\/SSID-la-gi-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-34346\" class=\"wp-caption-text\">SSID l\u00e0 g\u00ec?<\/figcaption><\/figure>\n<h2><span class=\"ez-toc-section\" id=\"Dac-diem-va-cau-truc-ten-Wi-Fi-SSID\"><\/span>\u0110\u1eb7c \u0111i\u1ec3m v\u00e0 c\u1ea5u tr\u00fac t\u00ean Wi-Fi SSID<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0110\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh t\u01b0\u01a1ng th\u00edch v\u00e0 ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh tr\u00ean nhi\u1ec1u lo\u1ea1i thi\u1ebft b\u1ecb, <strong>SSID<\/strong> \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf v\u1edbi m\u1ed9t s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m v\u00e0 c\u1ea5u tr\u00fac chu\u1ea9n h\u00f3a.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Kich-thuoc-gioi-han-cua-SSID\"><\/span>K\u00edch th\u01b0\u1edbc gi\u1edbi h\u1ea1n c\u1ee7a SSID<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>M\u1eb7c d\u00f9 b\u1ea1n c\u00f3 th\u1ec3 \u0111\u1eb7t b\u1ea5t k\u1ef3 t\u00ean n\u00e0o cho m\u1ea1ng Wi-Fi c\u1ee7a m\u00ecnh, chu\u1ea9n IEEE 802.11 quy \u0111\u1ecbnh \u0111\u1ed9 d\u00e0i c\u1ee7a <strong>SSID<\/strong> ch\u1ec9 t\u1ed1i \u0111a l\u00e0 32 byte (th\u01b0\u1eddng t\u01b0\u01a1ng \u0111\u01b0\u01a1ng 32 k\u00fd t\u1ef1 \u0111\u1ed1i v\u1edbi c\u00e1c k\u00fd t\u1ef1 Latin). \u0110\u1ed9 d\u00e0i n\u00e0y \u0111\u1ea3m b\u1ea3o r\u1eb1ng t\u00ean m\u1ea1ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c truy\u1ec1n t\u1ea3i hi\u1ec7u qu\u1ea3 trong c\u00e1c g\u00f3i tin m\u1ea1ng m\u00e0 kh\u00f4ng g\u00e2y qu\u00e1 t\u1ea3i ho\u1eb7c l\u1ed7i c\u1ea5u h\u00ecnh tr\u00ean c\u00e1c thi\u1ebft b\u1ecb c\u0169 h\u01a1n.<\/p>\n<p><strong>V\u00ed d\u1ee5:<\/strong> T\u00ean m\u1ea1ng c\u1ee7a b\u1ea1n &#8220;M\u1ea1ng Wi-Fi Gia \u0110\u00ecnh C\u1ee7a T\u00f4i T\u1ea7ng 5 Chung C\u01b0 A1&#8221; c\u00f3 th\u1ec3 \u0111\u00e3 \u0111\u1ea1t \u0111\u1ebfn gi\u1edbi h\u1ea1n n\u00e0y, trong khi t\u00ean \u0111\u01a1n gi\u1ea3n nh\u01b0 &#8220;InterDataNet_5G&#8221; th\u00ec ho\u00e0n to\u00e0n \u1ed5n \u0111\u1ecbnh v\u00e0 \u0111\u01b0\u1ee3c \u01b0u ti\u00ean h\u01a1n.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Tinh-nhay-cam-voi-chu-hoa-va-chu-thuong\"><\/span>T\u00ednh nh\u1ea1y c\u1ea3m v\u1edbi ch\u1eef hoa v\u00e0 ch\u1eef th\u01b0\u1eddng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>M\u1ed9t \u0111\u1eb7c \u0111i\u1ec3m quan tr\u1ecdng th\u01b0\u1eddng b\u1ecb ng\u01b0\u1eddi d\u00f9ng b\u1ecf qua l\u00e0 <strong>SSID<\/strong> c\u00f3 ph\u00e2n bi\u1ec7t ch\u1eef hoa v\u00e0 ch\u1eef th\u01b0\u1eddng (case-sensitive).<\/p>\n<p>\u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 n\u1ebfu b\u1ea1n c\u1ea5u h\u00ecnh <strong>SSID<\/strong> l\u00e0 &#8220;<strong>InterData<\/strong>&#8221; th\u00ec m\u1ed9t thi\u1ebft b\u1ecb c\u1ed1 g\u1eafng k\u1ebft n\u1ed1i v\u00e0o m\u1ea1ng &#8220;<strong>interdata<\/strong>&#8221; (vi\u1ebft th\u01b0\u1eddng) s\u1ebd th\u1ea5t b\u1ea1i, d\u00f9 c\u1ea3 hai chu\u1ed7i k\u00fd t\u1ef1 \u0111\u1ec1u gi\u1ed1ng nhau v\u1ec1 m\u1eb7t n\u1ed9i dung. S\u1ef1 nh\u1ea1y c\u1ea3m n\u00e0y gi\u00fap t\u0103ng t\u00ednh duy nh\u1ea5t v\u00e0 h\u1ed7 tr\u1ee3 qu\u1ea3n tr\u1ecb vi\u00ean m\u1ea1ng t\u1ea1o ra c\u00e1c bi\u1ebfn th\u1ec3 m\u1ea1ng r\u00f5 r\u00e0ng h\u01a1n.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Phan-biet-BSSID-va-ESSID\"><\/span>Ph\u00e2n bi\u1ec7t BSSID v\u00e0 ESSID<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Trong m\u1ea1ng kh\u00f4ng d\u00e2y, kh\u00f4ng ch\u1ec9 c\u00f3 <strong>SSID<\/strong> m\u00e0 c\u00f2n c\u00f3 c\u00e1c m\u00e3 \u0111\u1ecbnh danh kh\u00e1c m\u00e0 ng\u01b0\u1eddi d\u00f9ng k\u1ef9 thu\u1eadt c\u1ea7n n\u1eafm r\u00f5:<\/p>\n<ul>\n<li><strong>BSSID (Basic Service Set Identifier):<\/strong> \u0110\u00e2y l\u00e0 \u0111\u1ecba ch\u1ec9 MAC (Media Access Control) c\u1ee7a \u0111i\u1ec3m truy c\u1eadp Wi-Fi (Router ho\u1eb7c Access Point) m\u00e0 b\u1ea1n \u0111ang k\u1ebft n\u1ed1i. BSSID l\u00e0 m\u1ed9t m\u00e3 \u0111\u1ecbnh danh duy nh\u1ea5t v\u00e0 kh\u00f4ng th\u1ec3 thay \u0111\u1ed5i \u0111\u01b0\u1ee3c c\u1ee7a thi\u1ebft b\u1ecb ph\u1ea7n c\u1ee9ng. N\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u1edf c\u1ea5p \u0111\u1ed9 th\u1ea5p h\u01a1n, gi\u00fap c\u00e1c thi\u1ebft b\u1ecb bi\u1ebft ch\u00ednh x\u00e1c thi\u1ebft b\u1ecb v\u1eadt l\u00fd n\u00e0o \u0111ang ph\u00e1t t\u00edn hi\u1ec7u.<\/li>\n<li><strong>ESSID (Extended Service Set Identifier):<\/strong> \u0110\u00e2y ch\u00ednh l\u00e0 <strong>SSID<\/strong> quen thu\u1ed9c m\u00e0 ch\u00fang ta th\u01b0\u1eddng th\u1ea5y. ESSID \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c m\u1ea1ng l\u1edbn h\u01a1n, n\u01a1i c\u00f3 nhi\u1ec1u \u0111i\u1ec3m truy c\u1eadp (AP) c\u00f9ng s\u1eed d\u1ee5ng <strong>SSID<\/strong> gi\u1ed1ng nhau \u0111\u1ec3 t\u1ea1o th\u00e0nh m\u1ed9t m\u1ea1ng l\u1edbn, li\u1ec1n m\u1ea1ch (roaming) cho ng\u01b0\u1eddi d\u00f9ng. V\u00ed d\u1ee5: m\u1ed9t h\u1ec7 th\u1ed1ng Wi-Fi Mesh trong m\u1ed9t ng\u00f4i nh\u00e0 l\u1edbn s\u1eed d\u1ee5ng m\u1ed9t <strong>ESSID<\/strong> duy nh\u1ea5t, m\u1eb7c d\u00f9 c\u00f3 nhi\u1ec1u thi\u1ebft b\u1ecb Access Point v\u1eadt l\u00fd kh\u00e1c nhau (m\u1ed7i AP c\u00f3 BSSID ri\u00eang).<\/li>\n<\/ul>\n<p>Vi\u1ec7c hi\u1ec3u s\u1ef1 kh\u00e1c bi\u1ec7t n\u00e0y \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng khi b\u1ea1n x\u1eed l\u00fd c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 chuy\u1ec3n v\u00f9ng (roaming) ho\u1eb7c t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t m\u1ea1ng trong m\u00f4i tr\u01b0\u1eddng doanh nghi\u1ec7p.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Vai-tro-cua-SSID-trong-mang-khong-day\"><\/span>Vai tr\u00f2 c\u1ee7a SSID trong m\u1ea1ng kh\u00f4ng d\u00e2y<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>SSID<\/strong> l\u00e0 n\u1ec1n t\u1ea3ng c\u01a1 b\u1ea3n v\u00e0 kh\u00f4ng th\u1ec3 thi\u1ebfu trong m\u1ecdi ho\u1ea1t \u0111\u1ed9ng c\u1ee7a m\u1ea1ng Wi-Fi hi\u1ec7n \u0111\u1ea1i. Vai tr\u00f2 c\u1ee7a <strong>SSID<\/strong> kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 m\u1ed9t c\u00e1i t\u00ean m\u00e0 c\u00f2n l\u00e0 m\u1ed9t c\u01a1 ch\u1ebf t\u1ed5 ch\u1ee9c v\u00e0 b\u1ea3o m\u1eadt m\u1ea1ng ban \u0111\u1ea7u.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Vai-tro-nhan-dien-va-phan-biet-mang\"><\/span>Vai tr\u00f2 nh\u1eadn di\u1ec7n v\u00e0 ph\u00e2n bi\u1ec7t m\u1ea1ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u00e2y l\u00e0 vai tr\u00f2 c\u1ed1t l\u00f5i nh\u1ea5t c\u1ee7a <strong>SSID<\/strong>. Trong m\u1ed9t khu v\u1ef1c c\u00f3 nhi\u1ec1u s\u00f3ng Wi-Fi, <strong>SSID<\/strong> cho ph\u00e9p thi\u1ebft b\u1ecb c\u1ee7a b\u1ea1n nh\u1eadn di\u1ec7n ch\u00ednh x\u00e1c m\u1ea1ng m\u00e0 n\u00f3 \u0111\u01b0\u1ee3c ph\u00e9p v\u00e0 mu\u1ed1n k\u1ebft n\u1ed1i.<\/p>\n<p>H\u00e3y t\u01b0\u1edfng t\u01b0\u1ee3ng m\u1ed9t t\u00f2a nh\u00e0 v\u0103n ph\u00f2ng c\u00f3 ba m\u1ea1ng Wi-Fi kh\u00e1c nhau:<\/p>\n<ol>\n<li><strong>&#8220;InterData_Internal&#8221;<\/strong> (M\u1ea1ng n\u1ed9i b\u1ed9 cho nh\u00e2n vi\u00ean).<\/li>\n<li><strong>&#8220;InterData_Guest&#8221;<\/strong> (M\u1ea1ng d\u00e0nh cho kh\u00e1ch h\u00e0ng).<\/li>\n<li><strong>&#8220;Printer_Network&#8221;<\/strong> (M\u1ea1ng ch\u1ec9 d\u00e0nh cho m\u00e1y in).<\/li>\n<\/ol>\n<p>M\u1eb7c d\u00f9 c\u1ea3 ba m\u1ea1ng n\u00e0y c\u00f3 th\u1ec3 ph\u00e1t ra t\u1eeb c\u00f9ng m\u1ed9t router v\u1eadt l\u00fd (ho\u1eb7c c\u00e1c AP g\u1ea7n nhau), <strong>SSID<\/strong> kh\u00e1c nhau cho ph\u00e9p router qu\u1ea3n l\u00fd l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp ri\u00eang bi\u1ec7t cho t\u1eebng nh\u00f3m ng\u01b0\u1eddi d\u00f9ng.<\/p>\n<ul>\n<li>M\u1ea1ng <strong>&#8220;InterData_Internal&#8221;<\/strong> c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u01b0u ti\u00ean b\u0103ng th\u00f4ng v\u00e0 c\u00f3 quy\u1ec1n truy c\u1eadp v\u00e0o c\u00e1c m\u00e1y ch\u1ee7 n\u1ed9i b\u1ed9.<\/li>\n<li>M\u1ea1ng <strong>&#8220;InterData_Guest&#8221;<\/strong> b\u1ecb gi\u1edbi h\u1ea1n b\u0103ng th\u00f4ng v\u00e0 ch\u1ec9 \u0111\u01b0\u1ee3c truy c\u1eadp Internet.<\/li>\n<\/ul>\n<p>N\u1ebfu kh\u00f4ng c\u00f3 <strong>SSID<\/strong>, t\u1ea5t c\u1ea3 c\u00e1c thi\u1ebft b\u1ecb s\u1ebd ch\u1ec9 th\u1ea5y m\u1ed9t s\u00f3ng Wi-Fi chung chung v\u00e0 kh\u00f4ng th\u1ec3 ph\u00e2n bi\u1ec7t \u0111\u01b0\u1ee3c c\u00e1c quy t\u1eafc v\u00e0 quy\u1ec1n truy c\u1eadp kh\u00e1c nhau n\u00e0y.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Co-so-de-xac-thuc-va-ket-noi\"><\/span>C\u01a1 s\u1edf \u0111\u1ec3 x\u00e1c th\u1ef1c v\u00e0 k\u1ebft n\u1ed1i<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>SSID<\/strong> ho\u1ea1t \u0111\u1ed9ng nh\u01b0 l\u1edbp l\u1ecdc \u0111\u1ea7u ti\u00ean trong quy tr\u00ecnh k\u1ebft n\u1ed1i.<\/p>\n<ol>\n<li><strong>L\u1ef1a ch\u1ecdn:<\/strong> Ng\u01b0\u1eddi d\u00f9ng ch\u1ecdn <strong>SSID<\/strong> mong mu\u1ed1n t\u1eeb danh s\u00e1ch c\u00f3 s\u1eb5n.<\/li>\n<li><strong>Y\u00eau c\u1ea7u:<\/strong> Thi\u1ebft b\u1ecb g\u1eedi y\u00eau c\u1ea7u k\u1ebft n\u1ed1i, bao g\u1ed3m <strong>SSID<\/strong> \u0111\u00e3 ch\u1ecdn, \u0111\u1ebfn router.<\/li>\n<li><strong>X\u00e1c th\u1ef1c:<\/strong> Router ki\u1ec3m tra xem <strong>SSID<\/strong> n\u00e0y c\u00f3 kh\u1edbp v\u1edbi m\u1ed9t trong c\u00e1c m\u1ea1ng m\u00e0 n\u00f3 \u0111ang ph\u00e1t s\u00f3ng hay kh\u00f4ng.<\/li>\n<li><strong>Ho\u00e0n t\u1ea5t:<\/strong> N\u1ebfu kh\u1edbp, router s\u1ebd chuy\u1ec3n sang b\u01b0\u1edbc x\u00e1c th\u1ef1c th\u1ee9 c\u1ea5p (m\u1eadt kh\u1ea9u Wi-Fi).<\/li>\n<\/ol>\n<p>N\u1ebfu ng\u01b0\u1eddi d\u00f9ng nh\u1eadp sai <strong>SSID<\/strong> (v\u00ed d\u1ee5: nh\u1eadp t\u00ean m\u1ea1ng c\u1ee7a nh\u00e0 h\u00e0ng x\u00f3m), qu\u00e1 tr\u00ecnh k\u1ebft n\u1ed1i s\u1ebd b\u1ecb t\u1eeb ch\u1ed1i ngay l\u1eadp t\u1ee9c, ngay c\u1ea3 khi m\u1eadt kh\u1ea9u c\u00f3 th\u1ec3 l\u00e0 &#8220;12345678&#8221; v\u00e0 v\u00f4 t\u00ecnh tr\u00f9ng kh\u1edbp.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Ho-tro-tinh-nang-Roaming-Chuyen-vung\"><\/span>H\u1ed7 tr\u1ee3 t\u00ednh n\u0103ng Roaming (Chuy\u1ec3n v\u00f9ng)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c m\u1ea1ng l\u1edbn, \u0111\u1eb7c bi\u1ec7t l\u00e0 c\u00e1c gi\u1ea3i ph\u00e1p m\u1ea1ng Mesh ho\u1eb7c m\u1ea1ng doanh nghi\u1ec7p l\u1edbn, <strong>SSID<\/strong> cho ph\u00e9p ng\u01b0\u1eddi d\u00f9ng di chuy\u1ec3n li\u1ec1n m\u1ea1ch gi\u1eefa c\u00e1c \u0111i\u1ec3m truy c\u1eadp.<\/p>\n<p>Khi t\u1ea5t c\u1ea3 c\u00e1c Access Point trong m\u1ed9t khu v\u1ef1c r\u1ed9ng (v\u00ed d\u1ee5: m\u1ed9t kh\u00e1ch s\u1ea1n, m\u1ed9t tr\u01b0\u1eddng \u0111\u1ea1i h\u1ecdc) \u0111\u1ec1u \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh c\u00f9ng m\u1ed9t <strong>SSID<\/strong> v\u00e0 c\u00f9ng m\u1ed9t m\u1eadt kh\u1ea9u, thi\u1ebft b\u1ecb c\u1ee7a ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 t\u1ef1 \u0111\u1ed9ng &#8220;chuy\u1ec3n v\u00f9ng&#8221; (roam) t\u1eeb AP n\u00e0y sang AP kh\u00e1c m\u00e0 kh\u00f4ng b\u1ecb gi\u00e1n \u0111o\u1ea1n k\u1ebft n\u1ed1i.<\/p>\n<p>C\u01a1 ch\u1ebf n\u00e0y ho\u1ea1t \u0111\u1ed9ng v\u00ec <strong>SSID<\/strong> duy nh\u1ea5t \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u00e1c AP kh\u00e1c nhau \u0111\u01b0\u1ee3c coi l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a c\u00f9ng m\u1ed9t m\u1ea1ng m\u1edf r\u1ed9ng (ESS). \u0110i\u1ec1u n\u00e0y mang l\u1ea1i tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng tuy\u1ec7t v\u1eddi, \u0111\u1ea3m b\u1ea3o k\u1ebft n\u1ed1i Wi-Fi \u1ed5n \u0111\u1ecbnh ngay c\u1ea3 khi \u0111ang di chuy\u1ec3n.<\/p>\n<figure id=\"attachment_34347\" aria-describedby=\"caption-attachment-34347\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-34347\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/10\/Vai-tro-cua-SSID.jpg\" alt=\"Vai tr\u00f2 c\u1ee7a SSID\" width=\"800\" height=\"500\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/10\/Vai-tro-cua-SSID.jpg 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/10\/Vai-tro-cua-SSID-300x188.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/10\/Vai-tro-cua-SSID-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-34347\" class=\"wp-caption-text\">Vai tr\u00f2 c\u1ee7a SSID<\/figcaption><\/figure>\n<h2><span class=\"ez-toc-section\" id=\"Cach-hoat-dong-cua-SSID-wifi\"><\/span>C\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a SSID wifi<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>\u00a0ID m\u1ea1ng SSID<\/strong> kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t chu\u1ed7i k\u00fd t\u1ef1 t\u0129nh, n\u00f3 l\u00e0 th\u00f4ng tin \u0111\u01b0\u1ee3c truy\u1ec1n t\u1ea3i n\u0103ng \u0111\u1ed9ng trong m\u00f4i tr\u01b0\u1eddng kh\u00f4ng d\u00e2y. Hi\u1ec3u r\u00f5 c\u00e1ch <strong>SSID<\/strong> \u0111\u01b0\u1ee3c ph\u00e1t s\u00f3ng s\u1ebd gi\u00fap b\u1ea1n hi\u1ec3u s\u00e2u h\u01a1n v\u1ec1 b\u1ea3o m\u1eadt v\u00e0 c\u00e1ch m\u1ea1ng Wi-Fi v\u1eadn h\u00e0nh.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Phat-song-qua-Goi-tin-Beacon\"><\/span>Ph\u00e1t s\u00f3ng qua G\u00f3i tin Beacon<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Ph\u01b0\u01a1ng th\u1ee9c ch\u00ednh \u0111\u1ec3 <strong>SSID<\/strong> \u0111\u01b0\u1ee3c c\u00f4ng b\u1ed1 l\u00e0 th\u00f4ng qua c\u00e1c <strong>G\u00f3i tin Beacon<\/strong> (Beacon Frames).<\/p>\n<p>Router Wi-Fi c\u1ee7a b\u1ea1n (\u0111i\u1ec3m truy c\u1eadp) li\u00ean t\u1ee5c ph\u00e1t c\u00e1c g\u00f3i tin Beacon n\u00e0y trong kho\u1ea3ng th\u1eddi gian \u0111\u1ec1u \u0111\u1eb7n (th\u01b0\u1eddng l\u00e0 100 mili gi\u00e2y). M\u1ee5c \u0111\u00edch c\u1ee7a g\u00f3i tin Beacon l\u00e0 \u0111\u1ec3 th\u00f4ng b\u00e1o s\u1ef1 t\u1ed3n t\u1ea1i v\u00e0 c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u01a1 b\u1ea3n c\u1ee7a m\u1ea1ng kh\u00f4ng d\u00e2y \u0111\u00f3, bao g\u1ed3m:<\/p>\n<ul>\n<li><strong>SSID:<\/strong> T\u00ean m\u1ea1ng.<\/li>\n<li><strong>K\u00eanh:<\/strong> T\u1ea7n s\u1ed1 s\u00f3ng radio \u0111ang s\u1eed d\u1ee5ng (VD: K\u00eanh 6 tr\u00ean 2.4GHz).<\/li>\n<li><strong>Chu\u1ea9n Wi-Fi:<\/strong> Chu\u1ea9n 802.11 m\u00e0 m\u1ea1ng \u0111ang ho\u1ea1t \u0111\u1ed9ng (VD: 802.11ax\/Wi-Fi 6).<\/li>\n<li><strong>Ki\u1ec3u B\u1ea3o M\u1eadt:<\/strong> Lo\u1ea1i m\u00e3 h\u00f3a \u0111ang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng (VD: WPA3, WPA2).<\/li>\n<\/ul>\n<p><strong>G\u00f3i tin Beacon<\/strong> gi\u1ed1ng nh\u01b0 vi\u1ec7c router c\u1ee7a b\u1ea1n li\u00ean t\u1ee5c c\u1ea7m m\u1ed9t chi\u1ebfc loa v\u00e0 h\u00e9t l\u1edbn &#8220;T\u00f4i l\u00e0 m\u1ea1ng <strong>InterData_Pro<\/strong>, t\u00f4i \u0111ang \u1edf k\u00eanh 6, v\u00e0 t\u00f4i \u0111ang d\u00f9ng b\u1ea3o m\u1eadt WPA3. Ai mu\u1ed1n k\u1ebft n\u1ed1i th\u00ec h\u00e3y \u0111\u1ebfn \u0111\u00e2y!&#8221;.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Qua-trinh-quet-cua-thiet-bi\"><\/span>Qu\u00e1 tr\u00ecnh qu\u00e9t c\u1ee7a thi\u1ebft b\u1ecb<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Khi b\u1ea1n b\u1eadt Wi-Fi tr\u00ean \u0111i\u1ec7n tho\u1ea1i, thi\u1ebft b\u1ecb c\u1ee7a b\u1ea1n s\u1ebd th\u1ef1c hi\u1ec7n qu\u00e1 tr\u00ecnh qu\u00e9t th\u1ee5 \u0111\u1ed9ng (Passive Scanning) ho\u1eb7c qu\u00e9t ch\u1ee7 \u0111\u1ed9ng (Active Scanning):<\/p>\n<ol>\n<li><strong>Qu\u00e9t Th\u1ee5 \u0110\u1ed9ng (Passive):<\/strong> Thi\u1ebft b\u1ecb l\u1eafng nghe c\u00e1c g\u00f3i tin Beacon \u0111\u01b0\u1ee3c ph\u00e1t ra t\u1eeb c\u00e1c router xung quanh. Khi n\u00f3 b\u1eaft \u0111\u01b0\u1ee3c m\u1ed9t g\u00f3i Beacon, n\u00f3 s\u1ebd tr\u00edch xu\u1ea5t th\u00f4ng tin <strong>SSID<\/strong> v\u00e0 th\u00eam t\u00ean m\u1ea1ng n\u00e0y v\u00e0o danh s\u00e1ch Wi-Fi m\u00e0 b\u1ea1n nh\u00ecn th\u1ea5y.<\/li>\n<li><strong>Qu\u00e9t Ch\u1ee7 \u0110\u1ed9ng (Active):<\/strong> Thi\u1ebft b\u1ecb t\u1ef1 g\u1eedi m\u1ed9t g\u00f3i tin <strong>Probe Request<\/strong> (Y\u00eau c\u1ea7u th\u0103m d\u00f2) ra m\u00f4i tr\u01b0\u1eddng. B\u1ea5t k\u1ef3 router n\u00e0o nh\u1eadn \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u n\u00e0y s\u1ebd ph\u1ea3n h\u1ed3i l\u1ea1i b\u1eb1ng m\u1ed9t g\u00f3i tin <strong>Probe Response<\/strong> ch\u1ee9a <strong>SSID<\/strong> v\u00e0 th\u00f4ng tin chi ti\u1ebft kh\u00e1c c\u1ee7a m\u1ea1ng \u0111\u00f3.<\/li>\n<\/ol>\n<p>Qu\u00e1 tr\u00ecnh n\u00e0y di\u1ec5n ra ch\u1ec9 trong v\u00e0i gi\u00e2y, cho ph\u00e9p b\u1ea1n th\u1ea5y danh s\u00e1ch c\u00e1c <strong>t\u00ean m\u1ea1ng Wi-Fi<\/strong> ngay l\u1eadp t\u1ee9c v\u00e0 ch\u1ecdn m\u1ea1ng mu\u1ed1n k\u1ebft n\u1ed1i. \u0110\u00e2y l\u00e0 l\u00fd do t\u1ea1i sao, ngay c\u1ea3 khi b\u1ea1n kh\u00f4ng c\u1ed1 g\u1eafng k\u1ebft n\u1ed1i, <strong>SSID<\/strong> c\u1ee7a nh\u00e0 h\u00e0ng x\u00f3m v\u1eabn lu\u00f4n hi\u1ec3n th\u1ecb tr\u00ean thi\u1ebft b\u1ecb c\u1ee7a b\u1ea1n.<\/p>\n<figure id=\"attachment_34348\" aria-describedby=\"caption-attachment-34348\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-34348\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/10\/Cach-hoat-dong-cua-SSID.jpg\" alt=\"C\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a SSID\" width=\"800\" height=\"500\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/10\/Cach-hoat-dong-cua-SSID.jpg 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/10\/Cach-hoat-dong-cua-SSID-300x188.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/10\/Cach-hoat-dong-cua-SSID-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-34348\" class=\"wp-caption-text\">C\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a SSID<\/figcaption><\/figure>\n<h2><span class=\"ez-toc-section\" id=\"So-sanh-SSID-voi-cac-thong-so-mang-khac\"><\/span>So s\u00e1nh SSID v\u1edbi c\u00e1c th\u00f4ng s\u1ed1 m\u1ea1ng kh\u00e1c<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>M\u1ed9t trong nh\u1eefng ngu\u1ed3n g\u00e2y nh\u1ea7m l\u1eabn l\u1edbn nh\u1ea5t cho ng\u01b0\u1eddi d\u00f9ng c\u01a1 b\u1ea3n l\u00e0 vi\u1ec7c kh\u00f4ng th\u1ec3 ph\u00e2n bi\u1ec7t \u00a0ID m\u1ea1ng <strong>SSID<\/strong> v\u1edbi c\u00e1c th\u00f4ng s\u1ed1 quan tr\u1ecdng kh\u00e1c c\u1ee7a m\u1ea1ng. V\u1edbi kinh nghi\u1ec7m tri\u1ec3n khai h\u1ec7 th\u1ed1ng m\u1ea1ng, ch\u00fang t\u00f4i nh\u1eadn th\u1ea5y vi\u1ec7c l\u00e0m r\u00f5 \u0111i\u1ec1u n\u00e0y l\u00e0 c\u1ea7n thi\u1ebft \u0111\u1ec3 ng\u01b0\u1eddi d\u00f9ng kh\u00f4ng m\u1eafc sai l\u1ea7m khi kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"SSID-va-Mat-khau-PasswordKey\"><\/span>SSID v\u00e0 M\u1eadt kh\u1ea9u (Password\/Key)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u00e2y l\u00e0 s\u1ef1 nh\u1ea7m l\u1eabn ph\u1ed5 bi\u1ebfn nh\u1ea5t. <strong>SSID<\/strong> v\u00e0 M\u1eadt kh\u1ea9u l\u00e0 hai kh\u00e1i ni\u1ec7m ho\u00e0n to\u00e0n kh\u00e1c bi\u1ec7t v\u00e0 ph\u1ee5c v\u1ee5 hai m\u1ee5c \u0111\u00edch kh\u00e1c nhau trong quy tr\u00ecnh k\u1ebft n\u1ed1i.<\/p>\n<table style=\"width: 100%; border-collapse: collapse; margin-bottom: 20px;\">\n<thead>\n<tr>\n<th style=\"background-color: #050a71; color: white; padding: 10px; border: 1px solid #ddd; text-align: left;\">\u0110\u1eb7c \u0110i\u1ec3m<\/th>\n<th style=\"background-color: #050a71; color: white; padding: 10px; border: 1px solid #ddd; text-align: left;\">SSID (Service Set Identifier)<\/th>\n<th style=\"background-color: #050a71; color: white; padding: 10px; border: 1px solid #ddd; text-align: left;\">M\u1eadt kh\u1ea9u (Password\/Key)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 10px; border: 1px solid #ddd; background-color: #f2f2f2;\">Vai tr\u00f2<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd; background-color: #f2f2f2;\"><strong>Nh\u1eadn d\u1ea1ng<\/strong> m\u1ea1ng. N\u00f3 l\u00e0 danh t\u00ednh c\u00f4ng khai.<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd; background-color: #f2f2f2;\"><strong>X\u00e1c th\u1ef1c<\/strong> ng\u01b0\u1eddi d\u00f9ng. N\u00f3 l\u00e0 kh\u00f3a b\u00ed m\u1eadt.<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">T\u00ednh c\u00f4ng khai<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">Lu\u00f4n \u0111\u01b0\u1ee3c ph\u00e1t s\u00f3ng (tr\u1eeb khi b\u1ecb \u1ea9n), c\u00f4ng khai v\u00e0 d\u1ec5 d\u00e0ng \u0111\u01b0\u1ee3c qu\u00e9t th\u1ea5y.<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">Ph\u1ea3i \u0111\u01b0\u1ee3c nh\u1eadp b\u00ed m\u1eadt v\u00e0 kh\u00f4ng bao gi\u1edd \u0111\u01b0\u1ee3c truy\u1ec1n t\u1ea3i c\u00f4ng khai.<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px; border: 1px solid #ddd; background-color: #f2f2f2;\">Th\u1ef1c hi\u1ec7n<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd; background-color: #f2f2f2;\">B\u01b0\u1edbc \u0111\u1ea7u ti\u00ean trong vi\u1ec7c k\u1ebft n\u1ed1i.<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd; background-color: #f2f2f2;\">B\u01b0\u1edbc th\u1ee9 hai, sau khi \u0111\u00e3 ch\u1ecdn SSID.<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">N\u1ebfu sai<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">Thi\u1ebft b\u1ecb kh\u00f4ng th\u1ec3 t\u00ecm th\u1ea5y ho\u1eb7c nh\u1eadn di\u1ec7n m\u1ea1ng Wi-Fi.<\/td>\n<td style=\"padding: 10px; border: 1px solid #ddd;\">Thi\u1ebft b\u1ecb t\u00ecm th\u1ea5y m\u1ea1ng nh\u01b0ng kh\u00f4ng \u0111\u01b0\u1ee3c c\u1ea5p quy\u1ec1n truy c\u1eadp v\u00e0o Internet.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>V\u00ed d\u1ee5:<\/strong> B\u1ea1n c\u00f3 th\u1ec3 c\u00f3 m\u1ed9t <strong>SSID<\/strong> l\u00e0 &#8220;<strong>InterData_Support<\/strong>&#8221; (t\u00ean c\u00f4ng ty), nh\u01b0ng m\u1eadt kh\u1ea9u ph\u1ea3i l\u00e0 m\u1ed9t chu\u1ed7i k\u00fd t\u1ef1 ph\u1ee9c t\u1ea1p (v\u00ed d\u1ee5: P@ssw0rd123). Hai th\u1ee9 n\u00e0y kh\u00f4ng h\u1ec1 li\u00ean quan \u0111\u1ebfn nhau.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"SSID-va-Dia-chi-IP-IP-Address\"><\/span>SSID v\u00e0 \u0110\u1ecba ch\u1ec9 IP (IP Address)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u1ecba ch\u1ec9 IP (Internet Protocol Address) l\u00e0 m\u00e3 \u0111\u1ecbnh danh c\u1ea5p \u0111\u1ed9 m\u1ea1ng (Network Layer) \u0111\u01b0\u1ee3c g\u00e1n cho t\u1eebng thi\u1ebft b\u1ecb trong m\u1ea1ng, ho\u1eb7c cho ch\u00ednh router.<\/p>\n<ul>\n<li><strong>SSID<\/strong> l\u00e0 danh t\u00ednh c\u1ee7a to\u00e0n b\u1ed9 m\u1ea1ng kh\u00f4ng d\u00e2y.<\/li>\n<li><strong>\u0110\u1ecba ch\u1ec9 IP<\/strong> l\u00e0 \u0111\u1ecba ch\u1ec9 c\u1ee7a m\u1ed9t thi\u1ebft b\u1ecb c\u1ee5 th\u1ec3 (v\u00ed d\u1ee5: \u0111i\u1ec7n tho\u1ea1i c\u1ee7a b\u1ea1n, m\u00e1y t\u00ednh x\u00e1ch tay c\u1ee7a b\u1ea1n, ho\u1eb7c router c\u1ee7a b\u1ea1n).<\/li>\n<\/ul>\n<p>Khi b\u1ea1n c\u1ea7n c\u1ea5u h\u00ecnh l\u1ea1i router, b\u1ea1n th\u01b0\u1eddng ph\u1ea3i truy c\u1eadp v\u00e0o m\u1ed9t <strong>\u0110\u1ecba ch\u1ec9 IP<\/strong> m\u1eb7c \u0111\u1ecbnh (nh\u01b0 192.168.1.1 ho\u1eb7c 192.168.0.1). \u0110\u1ecba ch\u1ec9 IP n\u00e0y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u00ecm ki\u1ebfm <strong>thi\u1ebft b\u1ecb ph\u1ea7n c\u1ee9ng<\/strong> (Router), trong khi <strong>SSID<\/strong> \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u00ecm ki\u1ebfm <strong>t\u00ean m\u1ea1ng kh\u00f4ng d\u00e2y<\/strong> do thi\u1ebft b\u1ecb \u0111\u00f3 ph\u00e1t ra. Ch\u00fang ph\u1ee5c v\u1ee5 m\u1ee5c \u0111\u00edch kh\u00e1c nhau: <strong>SSID<\/strong> cho k\u1ebft n\u1ed1i kh\u00f4ng d\u00e2y, IP cho \u0111\u1ecbnh tuy\u1ebfn v\u00e0 qu\u1ea3n l\u00fd.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"SSID-va-MAC-Address-Dia-chi-MAC\"><\/span>SSID v\u00e0 MAC Address (\u0110\u1ecba ch\u1ec9 MAC)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u1ecba ch\u1ec9 MAC (Media Access Control Address) l\u00e0 \u0111\u1ecba ch\u1ec9 v\u1eadt l\u00fd, duy nh\u1ea5t v\u00e0 \u0111\u01b0\u1ee3c nh\u00e0 s\u1ea3n xu\u1ea5t g\u00e1n cho m\u1ed7i card m\u1ea1ng (Wi-Fi Card, Ethernet Card).<\/p>\n<ul>\n<li><strong>SSID<\/strong> l\u00e0 th\u00f4ng tin do ng\u01b0\u1eddi d\u00f9ng ho\u1eb7c qu\u1ea3n tr\u1ecb vi\u00ean \u0111\u1eb7t.<\/li>\n<li><strong>\u0110\u1ecba ch\u1ec9 MAC<\/strong> l\u00e0 th\u00f4ng tin c\u1ed1 \u0111\u1ecbnh c\u1ee7a ph\u1ea7n c\u1ee9ng, kh\u00f4ng th\u1ec3 thay \u0111\u1ed5i \u0111\u01b0\u1ee3c.<\/li>\n<\/ul>\n<p>Nh\u01b0 \u0111\u00e3 \u0111\u1ec1 c\u1eadp \u1edf ph\u1ea7n tr\u01b0\u1edbc, <strong>BSSID<\/strong> (th\u1ef1c th\u1ec3 g\u1ea7n v\u1edbi <strong>SSID<\/strong> nh\u1ea5t trong m\u1ea1ng kh\u00f4ng d\u00e2y) ch\u00ednh l\u00e0 \u0110\u1ecba ch\u1ec9 MAC c\u1ee7a Access Point. Do \u0111\u00f3, \u0110\u1ecba ch\u1ec9 MAC l\u00e0 nh\u1eadn d\u1ea1ng v\u1eadt l\u00fd c\u1ee7a thi\u1ebft b\u1ecb, c\u00f2n <strong>SSID<\/strong> l\u00e0 nh\u1eadn d\u1ea1ng logic c\u1ee7a m\u1ea1ng.<\/p>\n<figure id=\"attachment_34349\" aria-describedby=\"caption-attachment-34349\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-34349\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/10\/SSID-voi-cac-thong-so-mang-khac.jpg\" alt=\"SSID v\u1edbi c\u00e1c th\u00f4ng s\u1ed1 m\u1ea1ng kh\u00e1c\" width=\"800\" height=\"500\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/10\/SSID-voi-cac-thong-so-mang-khac.jpg 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/10\/SSID-voi-cac-thong-so-mang-khac-300x188.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/10\/SSID-voi-cac-thong-so-mang-khac-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-34349\" class=\"wp-caption-text\">SSID v\u1edbi c\u00e1c th\u00f4ng s\u1ed1 m\u1ea1ng kh\u00e1c<\/figcaption><\/figure>\n<h2><span class=\"ez-toc-section\" id=\"Cach-lay-SSID-wifi-tren-dien-thoai\"><\/span>C\u00e1ch l\u1ea5y SSID wifi tr\u00ean \u0111i\u1ec7n tho\u1ea1i<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>T\u00f9y theo t\u00ecnh hu\u1ed1ng s\u1eed d\u1ee5ng, b\u1ea1n c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng <strong>m\u1ed9t trong nh\u1eefng c\u00e1ch ki\u1ec3m tra SSID WiFi<\/strong> \u0111\u01a1n gi\u1ea3n d\u01b0\u1edbi \u0111\u00e2y \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh t\u00ean m\u1ea1ng \u0111ang d\u00f9ng.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Cach-kiem-tra-SSID-WiFi-truc-tiep-tren-modem-phat-mang\"><\/span>C\u00e1ch ki\u1ec3m tra SSID WiFi tr\u1ef1c ti\u1ebfp tr\u00ean modem ph\u00e1t m\u1ea1ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Ph\u1ea7n l\u1edbn c\u00e1c modem ho\u1eb7c thi\u1ebft b\u1ecb ph\u00e1t WiFi hi\u1ec7n nay \u0111\u1ec1u <strong>in s\u1eb5n SSID (t\u00ean WiFi)<\/strong> tr\u00ean nh\u00e3n d\u00e1n c\u1ee7a thi\u1ebft b\u1ecb. Nh\u00e3n n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c d\u00e1n \u1edf m\u1eb7t d\u01b0\u1edbi ho\u1eb7c b\u00ean h\u00f4ng modem, gi\u00fap ng\u01b0\u1eddi d\u00f9ng d\u1ec5 d\u00e0ng nh\u1eadn bi\u1ebft t\u00ean m\u1ea1ng. Tuy nhi\u00ean, \u0111\u1ec3 truy c\u1eadp Internet, b\u1ea1n v\u1eabn c\u1ea7n nh\u1eadp \u0111\u00fang m\u1eadt kh\u1ea9u WiFi t\u01b0\u01a1ng \u1ee9ng v\u1edbi SSID \u0111\u00f3.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Cach-lay-SSID-WiFi-bang-dia-chi-quan-tri-19216811\"><\/span>C\u00e1ch l\u1ea5y SSID WiFi b\u1eb1ng \u0111\u1ecba ch\u1ec9 qu\u1ea3n tr\u1ecb 192.168.1.1<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Trong tr\u01b0\u1eddng h\u1ee3p b\u1ea1n \u0111\u00e3 <strong>\u0111\u1ed5i t\u00ean SSID WiFi<\/strong> tr\u01b0\u1edbc \u0111\u00f3 nh\u01b0ng kh\u00f4ng c\u00f2n nh\u1edb ch\u00ednh x\u00e1c, vi\u1ec7c truy c\u1eadp v\u00e0o trang qu\u1ea3n tr\u1ecb modem l\u00e0 c\u00e1ch hi\u1ec7u qu\u1ea3 \u0111\u1ec3 ki\u1ec3m tra l\u1ea1i. C\u00e1c b\u01b0\u1edbc th\u1ef1c hi\u1ec7n nh\u01b0 sau:<\/p>\n<ul>\n<li><strong>B\u01b0\u1edbc 1:<\/strong> M\u1edf tr\u00ecnh duy\u1ec7t v\u00e0 truy c\u1eadp \u0111\u1ecba ch\u1ec9 qu\u1ea3n l\u00fd WiFi: https:\/\/192.168.1.1\/<\/li>\n<li><strong>B\u01b0\u1edbc 2:<\/strong> \u0110\u0103ng nh\u1eadp b\u1eb1ng <strong>Username v\u00e0 Password<\/strong> \u0111\u01b0\u1ee3c in tr\u00ean modem WiFi.<\/li>\n<li><strong>B\u01b0\u1edbc 3:<\/strong> Sau khi \u0111\u0103ng nh\u1eadp th\u00e0nh c\u00f4ng, ch\u1ecdn <strong>Network \u21d2 WLAN<\/strong> \u0111\u1ec3 xem t\u00ean SSID \u0111ang s\u1eed d\u1ee5ng. T\u1ea1i \u0111\u00e2y, b\u1ea1n c\u0169ng c\u00f3 th\u1ec3 truy c\u1eadp m\u1ee5c <strong>SSID Settings<\/strong> n\u1ebfu mu\u1ed1n thay \u0111\u1ed5i t\u00ean WiFi.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Cach-xem-SSID-WiFi-trong-phan-cai-dat-dien-thoai-iPhone-Android\"><\/span>C\u00e1ch xem SSID WiFi trong ph\u1ea7n c\u00e0i \u0111\u1eb7t \u0111i\u1ec7n tho\u1ea1i iPhone, Android<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Vi\u1ec7c ki\u1ec3m tra SSID WiFi tr\u00ean \u0111i\u1ec7n tho\u1ea1i <strong>iPhone ho\u1eb7c Android<\/strong> r\u1ea5t \u0111\u01a1n gi\u1ea3n, ch\u1ec9 c\u1ea7n thao t\u00e1c tr\u1ef1c ti\u1ebfp trong ph\u1ea7n c\u00e0i \u0111\u1eb7t thi\u1ebft b\u1ecb:<\/p>\n<ul>\n<li><strong>B\u01b0\u1edbc 1:<\/strong> M\u1edf <strong>C\u00e0i \u0111\u1eb7t<\/strong> tr\u00ean \u0111i\u1ec7n tho\u1ea1i.<\/li>\n<li><strong>B\u01b0\u1edbc 2:<\/strong> Ch\u1ecdn m\u1ee5c <strong>WiFi<\/strong>, l\u00fac n\u00e0y <strong>SSID c\u1ee7a m\u1ea1ng \u0111ang k\u1ebft n\u1ed1i<\/strong> s\u1ebd hi\u1ec3n th\u1ecb \u1edf v\u1ecb tr\u00ed \u0111\u1ea7u ti\u00ean v\u00e0 c\u00f3 d\u1ea5u t\u00edch b\u00ean c\u1ea1nh.<\/li>\n<\/ul>\n<h3><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-39167\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/10\/Cach-lay-SSID-wifi-tren-dien-thoai.jpg\" alt=\"C\u00e1ch l\u1ea5y SSID wifi tr\u00ean \u0111i\u1ec7n tho\u1ea1i\" width=\"850\" height=\"870\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/10\/Cach-lay-SSID-wifi-tren-dien-thoai.jpg 850w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/10\/Cach-lay-SSID-wifi-tren-dien-thoai-293x300.jpg 293w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/10\/Cach-lay-SSID-wifi-tren-dien-thoai-768x786.jpg 768w\" sizes=\"auto, (max-width: 850px) 100vw, 850px\" \/><\/h3>\n<h3><span class=\"ez-toc-section\" id=\"Mot-so-luu-y-lien-quan-den-SSID-WiFi\"><\/span>M\u1ed9t s\u1ed1 l\u01b0u \u00fd li\u00ean quan \u0111\u1ebfn SSID WiFi:<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>T\u1ea5t c\u1ea3 c\u00e1c c\u00e1ch ki\u1ec3m tra SSID WiFi n\u00eau tr\u00ean <strong>\u0111\u1ec1u mi\u1ec5n ph\u00ed<\/strong> v\u00e0 d\u1ec5 th\u1ef1c hi\u1ec7n.<\/li>\n<li>Ng\u01b0\u1eddi d\u00f9ng n\u00ean <strong>\u0111\u1ed5i t\u00ean SSID WiFi<\/strong> th\u00e0nh t\u00ean d\u1ec5 nh\u1edb \u0111\u1ec3 thu\u1eadn ti\u1ec7n khi k\u1ebft n\u1ed1i v\u00e0 ph\u00e2n bi\u1ec7t v\u1edbi m\u1ea1ng WiFi kh\u00e1c trong khu v\u1ef1c.<\/li>\n<li>SSID WiFi n\u00ean \u0111\u01b0\u1ee3c \u0111\u1eb7t <strong>ng\u1eafn g\u1ecdn, r\u00f5 r\u00e0ng v\u00e0 d\u1ec5 nh\u1eadn di\u1ec7n<\/strong>.<\/li>\n<li>N\u1ebfu b\u1ea1n s\u1eed d\u1ee5ng WiFi c\u1ee7a <strong>Viettel<\/strong> nh\u01b0ng kh\u00f4ng l\u1ea5y \u0111\u01b0\u1ee3c SSID ho\u1eb7c c\u1ea7n h\u1ed7 tr\u1ee3 th\u00eam, h\u00e3y li\u00ean h\u1ec7 <strong>t\u1ed5ng \u0111\u00e0i 1800 8119<\/strong> \u0111\u1ec3 \u0111\u01b0\u1ee3c t\u01b0 v\u1ea5n.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Cach-kiem-tra-va-doi-ten-SSID-tren-thiet-bi\"><\/span>C\u00e1ch ki\u1ec3m tra v\u00e0 \u0111\u1ed5i t\u00ean SSID tr\u00ean thi\u1ebft b\u1ecb<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>C\u00e1ch l\u1ea5y SSID Wifi tr\u00ean \u0111i\u1ec7n tho\u1ea1i Android\/iOS, Windows, macOS, router nh\u01b0 th\u1ebf n\u00e0o? \u0110\u1ec3 ki\u1ec3m tra v\u00e0 \u0111\u1ed5i t\u00ean SSID tr\u00ean c\u00e1c thi\u1ebft b\u1ecb, th\u1ef1c hi\u1ec7n theo c\u00e1c b\u01b0\u1edbc sau:<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Cach-kiem-tra-SSID\"><\/span>C\u00e1ch ki\u1ec3m tra SSID<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><strong>Tr\u00ean Windows:<\/strong> Nh\u1ea5p v\u00e0o bi\u1ec3u t\u01b0\u1ee3ng Wi-Fi \u1edf g\u00f3c d\u01b0\u1edbi c\u00f9ng b\u00ean ph\u1ea3i m\u00e0n h\u00ecnh, danh s\u00e1ch c\u00e1c m\u1ea1ng kh\u1ea3 d\u1ee5ng (SSID) s\u1ebd hi\u1ec7n ra, SSID \u0111ang k\u1ebft n\u1ed1i s\u1ebd \u1edf \u0111\u1ea7u danh s\u00e1ch.<\/li>\n<li><strong>Tr\u00ean macOS:<\/strong> Nh\u1ea5p v\u00e0o bi\u1ec3u t\u01b0\u1ee3ng Wi-Fi \u1edf g\u00f3c tr\u00ean b\u00ean ph\u1ea3i, SSID \u0111ang k\u1ebft n\u1ed1i s\u1ebd c\u00f3 bi\u1ec3u t\u01b0\u1ee3ng m\u00e0u xanh lam ho\u1eb7c d\u1ea5u t\u00edch.<\/li>\n<li><strong>Tr\u00ean Android\/iOS:<\/strong> V\u00e0o C\u00e0i \u0111\u1eb7t &gt; Wi-Fi, SSID m\u1ea1ng \u0111ang k\u1ebft n\u1ed1i s\u1ebd hi\u1ec3n th\u1ecb \u1edf \u0111\u1ea7u danh s\u00e1ch v\u00e0 c\u00f3 d\u1ea5u t\u00edch b\u00ean c\u1ea1nh.<\/li>\n<li><strong>Tr\u00ean router:<\/strong> SSID m\u1eb7c \u0111\u1ecbnh th\u01b0\u1eddng \u0111\u01b0\u1ee3c in tr\u00ean nh\u00e3n d\u00e1n \u1edf m\u1eb7t d\u01b0\u1edbi ho\u1eb7c m\u1eb7t b\u00ean thi\u1ebft b\u1ecb.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Cach-doi-ten-SSID\"><\/span>C\u00e1ch \u0111\u1ed5i t\u00ean SSID<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ol>\n<li>K\u1ebft n\u1ed1i m\u00e1y t\u00ednh ho\u1eb7c \u0111i\u1ec7n tho\u1ea1i v\u1edbi router qua Wi-Fi ho\u1eb7c c\u00e1p m\u1ea1ng.<\/li>\n<li>M\u1edf tr\u00ecnh duy\u1ec7t web, nh\u1eadp \u0111\u1ecba ch\u1ec9 IP c\u1ee7a router (th\u01b0\u1eddng l\u00e0 192.168.0.1 ho\u1eb7c 192.168.1.1).<\/li>\n<li>\u0110\u0103ng nh\u1eadp b\u1eb1ng t\u00e0i kho\u1ea3n qu\u1ea3n tr\u1ecb (th\u00f4ng tin n\u00e0y th\u01b0\u1eddng in tr\u00ean router ho\u1eb7c trong s\u00e1ch h\u01b0\u1edbng d\u1eabn).<\/li>\n<li>T\u00ecm m\u1ee5c \u201cWireless Settings\u201d ho\u1eb7c \u201cWi-Fi Settings\u201d.<\/li>\n<li>T\u1ea1i tr\u01b0\u1eddng \u201cSSID\u201d ho\u1eb7c \u201cNetwork Name\u201d, nh\u1eadp t\u00ean m\u1edbi cho m\u1ea1ng Wi-Fi.<\/li>\n<li>L\u01b0u l\u1ea1i c\u00e0i \u0111\u1eb7t v\u00e0 kh\u1edfi \u0111\u1ed9ng l\u1ea1i router n\u1ebfu c\u1ea7n thi\u1ebft.<\/li>\n<\/ol>\n<p>Sau khi \u0111\u1ed5i t\u00ean, c\u00e1c thi\u1ebft b\u1ecb s\u1ebd ph\u1ea3i k\u1ebft n\u1ed1i l\u1ea1i v\u1edbi SSID m\u1edbi.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Rui-ro-bao-mat-lien-quan-den-SSID\"><\/span>R\u1ee7i ro b\u1ea3o m\u1eadt li\u00ean quan \u0111\u1ebfn SSID<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>M\u1eb7c d\u00f9 <strong>SSID<\/strong> l\u00e0 th\u00f4ng tin c\u00f4ng khai, vi\u1ec7c \u0111\u1eb7t t\u00ean v\u00e0 c\u1ea5u h\u00ecnh <strong>SSID<\/strong> kh\u00f4ng c\u1ea9n th\u1eadn c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn m\u1ed9t s\u1ed1 r\u1ee7i ro b\u1ea3o m\u1eadt kh\u00f4ng \u0111\u00e1ng c\u00f3.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Tiet-lo-thong-tin-nha-cung-cap-va-mau-thiet-bi\"><\/span>Ti\u1ebft l\u1ed9 th\u00f4ng tin nh\u00e0 cung c\u1ea5p v\u00e0 m\u1eabu thi\u1ebft b\u1ecb<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Nhi\u1ec1u router \u0111\u01b0\u1ee3c nh\u00e0 s\u1ea3n xu\u1ea5t ho\u1eb7c nh\u00e0 m\u1ea1ng c\u00e0i \u0111\u1eb7t <strong>SSID<\/strong> m\u1eb7c \u0111\u1ecbnh theo c\u00f4ng th\u1ee9c <code>[T\u00ean H\u00e3ng]_[M\u00e3 M\u1eabu]<\/code> ho\u1eb7c <code>[T\u00ean H\u00e3ng]_[4 k\u00fd t\u1ef1 ng\u1eabu nhi\u00ean]<\/code>.<\/p>\n<p>Vi\u1ec7c s\u1eed d\u1ee5ng <strong>SSID<\/strong> m\u1eb7c \u0111\u1ecbnh n\u00e0y ngay l\u1eadp t\u1ee9c ti\u1ebft l\u1ed9 hai th\u00f4ng tin quan tr\u1ecdng cho k\u1ebb t\u1ea5n c\u00f4ng:<\/p>\n<ol>\n<li><strong>Th\u01b0\u01a1ng hi\u1ec7u Router:<\/strong> Gi\u00fap hacker d\u1ec5 d\u00e0ng tra c\u1ee9u c\u00e1c l\u1ed7 h\u1ed5ng b\u1ea3o m\u1eadt c\u00f4ng khai (CVEs) \u0111\u00e3 bi\u1ebft c\u1ee7a h\u00e3ng \u0111\u00f3.<\/li>\n<li><strong>M\u1eabu thi\u1ebft b\u1ecb:<\/strong> D\u1eabn \u0111\u1ebfn vi\u1ec7c d\u00f2 t\u00ecm m\u1eadt kh\u1ea9u m\u1eb7c \u0111\u1ecbnh (v\u00ec nhi\u1ec1u m\u1eabu router c\u00f3 m\u1eadt kh\u1ea9u m\u1eb7c \u0111\u1ecbnh y\u1ebfu ho\u1eb7c d\u1ec5 \u0111o\u00e1n) ho\u1eb7c c\u00e1c ph\u01b0\u01a1ng th\u1ee9c khai th\u00e1c chuy\u00ean bi\u1ec7t.<\/li>\n<\/ol>\n<p>Vi\u1ec7c \u0111\u1ed5i t\u00ean <strong>SSID<\/strong> ngay l\u1eadp t\u1ee9c sau khi l\u1eafp \u0111\u1eb7t l\u00e0 m\u1ed9t h\u00e0nh \u0111\u1ed9ng b\u1ea3o m\u1eadt t\u1ed1i thi\u1ec3u m\u00e0 ch\u00fang t\u00f4i lu\u00f4n khuy\u1ebfn ngh\u1ecb.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Nguy-co-tiet-lo-thong-tin-ca-nhan-hoac-vi-tri\"><\/span>Nguy c\u01a1 ti\u1ebft l\u1ed9 th\u00f4ng tin c\u00e1 nh\u00e2n ho\u1eb7c v\u1ecb tr\u00ed<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Nhi\u1ec1u ng\u01b0\u1eddi d\u00f9ng v\u00f4 t\u00ecnh \u0111\u1eb7t \u00a0ID m\u1ea1ng <strong>SSID<\/strong> c\u1ee7a h\u1ecd theo t\u00ean ri\u00eang, \u0111\u1ecba ch\u1ec9 nh\u00e0, ho\u1eb7c s\u1ed1 c\u0103n h\u1ed9.<code><\/code><\/p>\n<p>K\u1ebb t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c th\u00f4ng tin n\u00e0y k\u1ebft h\u1ee3p v\u1edbi c\u00e1c c\u00f4ng c\u1ee5 d\u00f2 qu\u00e9t m\u1ea1ng c\u00f4ng c\u1ed9ng (nh\u01b0 Google Maps ho\u1eb7c c\u00e1c d\u1ecbch v\u1ee5 \u00e1nh x\u1ea1 Wi-Fi) \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh v\u1ecb tr\u00ed ch\u00ednh x\u00e1c c\u1ee7a m\u1ea1ng v\u00e0 m\u1ee5c ti\u00eau v\u1eadt l\u00fd. \u0110i\u1ec1u n\u00e0y kh\u00f4ng ch\u1ec9 g\u00e2y nguy hi\u1ec3m cho d\u1eef li\u1ec7u s\u1ed1 m\u00e0 c\u00f2n \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ef1 an to\u00e0n c\u00e1 nh\u00e2n v\u00e0 t\u00e0i s\u1ea3n.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Tan-cong-Wi-Fi-bang-cach-gia-mao-SSID-Evil-Twin-Attack\"><\/span>T\u1ea5n c\u00f4ng Wi-Fi b\u1eb1ng c\u00e1ch gi\u1ea3 m\u1ea1o SSID (Evil Twin Attack)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u00e2y l\u00e0 m\u1ed9t h\u00ecnh th\u1ee9c t\u1ea5n c\u00f4ng nguy hi\u1ec3m, trong \u0111\u00f3 k\u1ebb t\u1ea5n c\u00f4ng t\u1ea1o ra m\u1ed9t \u0111i\u1ec3m truy c\u1eadp gi\u1ea3 m\u1ea1o c\u00f3 <strong>SSID<\/strong> ho\u00e0n to\u00e0n gi\u1ed1ng v\u1edbi m\u1ed9t m\u1ea1ng Wi-Fi c\u00f4ng c\u1ed9ng h\u1ee3p ph\u00e1p (v\u00ed d\u1ee5: <code>Starbucks_Free_Wifi<\/code> ho\u1eb7c <code>Airport_Lounge<\/code>).<\/p>\n<p>Khi thi\u1ebft b\u1ecb c\u1ee7a ng\u01b0\u1eddi d\u00f9ng c\u1ed1 g\u1eafng k\u1ebft n\u1ed1i v\u1edbi <strong>SSID<\/strong> gi\u1ea3 m\u1ea1o n\u00e0y, k\u1ebb t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng \u0111\u00e1nh c\u1eafp th\u00f4ng tin \u0111\u0103ng nh\u1eadp, m\u1eadt kh\u1ea9u ng\u00e2n h\u00e0ng, ho\u1eb7c c\u00e1c d\u1eef li\u1ec7u c\u00e1 nh\u00e2n kh\u00e1c v\u00ec l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp c\u1ee7a ng\u01b0\u1eddi d\u00f9ng s\u1ebd \u0111i qua m\u00e1y ch\u1ee7 c\u1ee7a h\u1ecd.<\/p>\n<p>M\u1eb7c d\u00f9 t\u1ea5n c\u00f4ng n\u00e0y kh\u00f4ng tr\u1ef1c ti\u1ebfp khai th\u00e1c <strong>SSID<\/strong> c\u1ee7a b\u1ea1n, nh\u01b0ng n\u00f3 cho th\u1ea5y vi\u1ec7c tin t\u01b0\u1edfng m\u00f9 qu\u00e1ng v\u00e0o <strong>t\u00ean m\u1ea1ng Wi-Fi<\/strong> l\u00e0 nguy hi\u1ec3m.<\/p>\n<figure id=\"attachment_34350\" aria-describedby=\"caption-attachment-34350\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-34350\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/10\/Rui-ro-bao-mat-lien-quan-den-SSID.jpg\" alt=\"R\u1ee7i ro b\u1ea3o m\u1eadt li\u00ean quan \u0111\u1ebfn SSID\" width=\"800\" height=\"500\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/10\/Rui-ro-bao-mat-lien-quan-den-SSID.jpg 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/10\/Rui-ro-bao-mat-lien-quan-den-SSID-300x188.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/10\/Rui-ro-bao-mat-lien-quan-den-SSID-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-34350\" class=\"wp-caption-text\">R\u1ee7i ro b\u1ea3o m\u1eadt li\u00ean quan \u0111\u1ebfn SSID<\/figcaption><\/figure>\n<h2><span class=\"ez-toc-section\" id=\"Bien-phap-nang-cao-bao-ve-mang-bang-SSID\"><\/span>Bi\u1ec7n ph\u00e1p n\u00e2ng cao b\u1ea3o v\u1ec7 m\u1ea1ng b\u1eb1ng SSID<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Ch\u00fang t\u00f4i tin r\u1eb1ng vi\u1ec7c ch\u1ee7 \u0111\u1ed9ng b\u1ea3o v\u1ec7 m\u1ea1ng b\u1eaft \u0111\u1ea7u t\u1eeb nh\u1eefng chi ti\u1ebft nh\u1ecf, nh\u01b0 c\u00e1ch b\u1ea1n \u0111\u1eb7t t\u00ean <strong>SSID<\/strong>. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1c bi\u1ec7n ph\u00e1p n\u00e2ng cao gi\u00fap b\u1ea1n bi\u1ebfn <strong>SSID<\/strong> th\u00e0nh m\u1ed9t l\u1edbp b\u1ea3o v\u1ec7 th\u00f4ng minh.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Dat-ten-SSID-vo-danh-va-chuyen-nghiep\"><\/span>\u0110\u1eb7t t\u00ean SSID v\u00f4 danh v\u00e0 chuy\u00ean nghi\u1ec7p<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>N\u00ean ch\u1ecdn m\u1ed9t <strong>SSID<\/strong> kh\u00f4ng mang \u00fd ngh\u0129a c\u00e1 nh\u00e2n, kh\u00f4ng li\u00ean quan \u0111\u1ebfn \u0111\u1ecba \u0111i\u1ec3m, v\u00e0 kh\u00f4ng ti\u1ebft l\u1ed9 h\u00e3ng thi\u1ebft b\u1ecb.<\/p>\n<p><strong>N\u00ean l\u00e0m:<\/strong><\/p>\n<ul>\n<li>S\u1eed d\u1ee5ng t\u00ean m\u1ea1ng ng\u1eabu nhi\u00ean, s\u00e1ng t\u1ea1o (VD: <code>The Matrix<\/code>, <code>HiddenBase<\/code>, <code>InterData_Guest<\/code>).<\/li>\n<li>\u0110\u1eb7t t\u00ean theo ch\u1ee7 \u0111\u1ec1 kh\u00f4ng li\u00ean quan \u0111\u1ebfn v\u1ecb tr\u00ed (VD: <code>Jupiter<\/code>, <code>Mars<\/code>, <code>Saturn<\/code>).<\/li>\n<li>\u0110\u1ed5i t\u00ean <strong>SSID<\/strong> m\u1eb7c \u0111\u1ecbnh ngay l\u1eadp t\u1ee9c.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Phan-tach-mang-bang-SSID-cho-mang-khach-Guest-Network\"><\/span>Ph\u00e2n t\u00e1ch m\u1ea1ng b\u1eb1ng SSID cho m\u1ea1ng kh\u00e1ch (Guest Network)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>H\u1ea7u h\u1ebft c\u00e1c router hi\u1ec7n \u0111\u1ea1i \u0111\u1ec1u cho ph\u00e9p t\u1ea1o m\u1ea1ng kh\u00e1ch (Guest Network). \u0110\u00e2y l\u00e0 m\u1ed9t chi\u1ebfn l\u01b0\u1ee3c b\u1ea3o m\u1eadt c\u1ef1c k\u1ef3 hi\u1ec7u qu\u1ea3:<\/p>\n<ol>\n<li><strong>T\u1ea1o hai SSID ri\u00eang bi\u1ec7t:<\/strong> M\u1ed9t <strong>SSID<\/strong> ch\u00ednh (<code>InterData_Secure<\/code>) v\u00e0 m\u1ed9t <strong>SSID<\/strong> kh\u00e1ch (<code>InterData_Guest<\/code>).<\/li>\n<li><strong>C\u00f4 l\u1eadp:<\/strong> M\u1ea1ng kh\u00e1ch \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh \u0111\u1ec3 c\u00f4 l\u1eadp ng\u01b0\u1eddi d\u00f9ng kh\u1ecfi c\u00e1c thi\u1ebft b\u1ecb n\u1ed9i b\u1ed9 (m\u00e1y t\u00ednh, \u1ed5 c\u1ee9ng m\u1ea1ng, m\u00e1y in) c\u1ee7a b\u1ea1n.<\/li>\n<li><strong>M\u1eadt kh\u1ea9u y\u1ebfu h\u01a1n (n\u1ebfu c\u1ea7n):<\/strong> N\u1ebfu b\u1ea1n b\u1eaft bu\u1ed9c ph\u1ea3i cung c\u1ea5p m\u1eadt kh\u1ea9u \u0111\u01a1n gi\u1ea3n cho kh\u00e1ch h\u00e0ng ho\u1eb7c b\u1ea1n b\u00e8, b\u1ea1n ch\u1ec9 c\u1ea7n l\u00e0m v\u1eady tr\u00ean m\u1ea1ng kh\u00e1ch. M\u1ea1ng ch\u00ednh c\u1ee7a b\u1ea1n v\u1eabn \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 b\u1eb1ng m\u1eadt kh\u1ea9u m\u1ea1nh.<\/li>\n<\/ol>\n<p>Vi\u1ec7c ph\u00e2n t\u00e1ch n\u00e0y \u0111\u1ea3m b\u1ea3o r\u1eb1ng ngay c\u1ea3 khi m\u1ea1ng kh\u00e1ch b\u1ecb x\u00e2m ph\u1ea1m, k\u1ebb t\u1ea5n c\u00f4ng v\u1eabn kh\u00f4ng th\u1ec3 truy c\u1eadp v\u00e0o d\u1eef li\u1ec7u quan tr\u1ecdng tr\u00ean m\u1ea1ng ch\u00ednh c\u1ee7a b\u1ea1n.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Vo-hieu-hoa-WPS-Wi-Fi-Protected-Setup\"><\/span>V\u00f4 hi\u1ec7u h\u00f3a WPS (Wi-Fi Protected Setup)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>SSID<\/strong> th\u01b0\u1eddng \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi t\u00ednh n\u0103ng WPS. WPS \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 k\u1ebft n\u1ed1i thi\u1ebft b\u1ecb d\u1ec5 d\u00e0ng b\u1eb1ng c\u00e1ch nh\u1eadp m\u00e3 PIN 8 ch\u1eef s\u1ed1 ho\u1eb7c nh\u1ea5n n\u00fat v\u1eadt l\u00fd. Tuy nhi\u00ean, c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u \u0111\u00e3 ph\u00e1t hi\u1ec7n ra c\u00e1c l\u1ed7 h\u1ed5ng nghi\u00eam tr\u1ecdng trong vi\u1ec7c x\u00e1c th\u1ef1c PIN 8 ch\u1eef s\u1ed1, cho ph\u00e9p k\u1ebb t\u1ea5n c\u00f4ng d\u00f2 t\u00ecm m\u00e3 PIN ch\u1ec9 trong v\u00e0i gi\u1edd.<\/p>\n<p>M\u1eb7c d\u00f9 kh\u00f4ng li\u00ean quan tr\u1ef1c ti\u1ebfp \u0111\u1ebfn t\u00ean <strong>SSID<\/strong>, vi\u1ec7c v\u00f4 hi\u1ec7u h\u00f3a WPS trong c\u00e0i \u0111\u1eb7t router s\u1ebd lo\u1ea1i b\u1ecf m\u1ed9t nguy c\u01a1 t\u1ea5n c\u00f4ng ti\u1ec1m t\u00e0ng v\u00e0o m\u1ea1ng Wi-Fi, b\u1ea5t k\u1ec3 <strong>SSID<\/strong> c\u1ee7a b\u1ea1n \u0111\u01b0\u1ee3c \u0111\u1eb7t t\u00ean nh\u01b0 th\u1ebf n\u00e0o.<\/p>\n<figure id=\"attachment_34351\" aria-describedby=\"caption-attachment-34351\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-34351\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/10\/Bien-phap-nang-cao-bao-ve-mang-bang-SSID.jpg\" alt=\"Bi\u1ec7n ph\u00e1p n\u00e2ng cao b\u1ea3o v\u1ec7 m\u1ea1ng b\u1eb1ng SSID\" width=\"800\" height=\"500\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/10\/Bien-phap-nang-cao-bao-ve-mang-bang-SSID.jpg 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/10\/Bien-phap-nang-cao-bao-ve-mang-bang-SSID-300x188.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/10\/Bien-phap-nang-cao-bao-ve-mang-bang-SSID-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-34351\" class=\"wp-caption-text\">Bi\u1ec7n ph\u00e1p n\u00e2ng cao b\u1ea3o v\u1ec7 m\u1ea1ng b\u1eb1ng SSID<\/figcaption><\/figure>\n<h2><span class=\"ez-toc-section\" id=\"Co-nen-an-SSID\"><\/span>C\u00f3 n\u00ean \u1ea9n SSID?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0110\u00e2y l\u00e0 m\u1ed9t c\u00e2u h\u1ecfi ch\u00fang t\u00f4i nh\u1eadn \u0111\u01b0\u1ee3c r\u1ea5t nhi\u1ec1u t\u1eeb c\u1ea3 ng\u01b0\u1eddi d\u00f9ng c\u01a1 b\u1ea3n v\u00e0 b\u00e1n chuy\u00ean. Vi\u1ec7c \u1ea9n <strong>SSID<\/strong> c\u00f3 v\u1ebb l\u00e0 m\u1ed9t bi\u1ec7n ph\u00e1p b\u1ea3o m\u1eadt h\u1ee3p l\u00fd: n\u1ebfu ng\u01b0\u1eddi kh\u00e1c kh\u00f4ng th\u1ea5y t\u00ean m\u1ea1ng Wi-Fi c\u1ee7a b\u1ea1n, h\u1ecd s\u1ebd kh\u00f4ng th\u1ec3 k\u1ebft n\u1ed1i, \u0111\u00fang kh\u00f4ng?<\/p>\n<p>Th\u1ef1c t\u1ebf, \u1ea9n <strong>SSID<\/strong> l\u00e0 m\u1ed9t h\u00ecnh th\u1ee9c b\u1ea3o m\u1eadt d\u1ef1a tr\u00ean s\u1ef1 t\u1ed1i ngh\u0129a (Security Through Obscurity), v\u00e0 n\u00f3 kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t bi\u1ec7n ph\u00e1p b\u1ea3o m\u1eadt m\u1ea1nh m\u1ebd hay hi\u1ec7u qu\u1ea3.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Ao-tuong-ve-an-toan-khi-an-SSID\"><\/span>\u1ea2o t\u01b0\u1edfng v\u1ec1 an to\u00e0n khi \u1ea9n SSID<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Khi b\u1ea1n ch\u1ecdn t\u00f9y ch\u1ecdn &#8220;\u1ea8n <strong>SSID<\/strong>&#8221; trong c\u00e0i \u0111\u1eb7t router, router c\u1ee7a b\u1ea1n s\u1ebd ng\u1eebng \u0111\u01b0a <strong>SSID<\/strong> v\u00e0o c\u00e1c g\u00f3i tin Beacon. Do \u0111\u00f3, t\u00ean m\u1ea1ng s\u1ebd kh\u00f4ng xu\u1ea5t hi\u1ec7n trong danh s\u00e1ch Wi-Fi tr\u00ean c\u00e1c thi\u1ebft b\u1ecb xung quanh.<\/p>\n<p>Tuy nhi\u00ean, \u0111\u00e2y l\u00e0 l\u00fd do t\u1ea1i sao n\u00f3 kh\u00f4ng th\u1ef1c s\u1ef1 an to\u00e0n:<\/p>\n<ol>\n<li><strong>Thi\u1ebft b\u1ecb v\u1eabn ph\u00e1t s\u00f3ng:<\/strong> Khi thi\u1ebft b\u1ecb c\u1ee7a b\u1ea1n (\u0111i\u1ec7n tho\u1ea1i, laptop) c\u1ed1 g\u1eafng k\u1ebft n\u1ed1i v\u1edbi m\u1ea1ng Wi-Fi \u1ea9n \u0111\u00f3, n\u00f3 ph\u1ea3i li\u00ean t\u1ee5c g\u1eedi c\u00e1c g\u00f3i tin <strong>Probe Request<\/strong> (Y\u00eau c\u1ea7u th\u0103m d\u00f2) ch\u1ee9a <strong>SSID<\/strong> <strong>R\u00d5 R\u00c0NG<\/strong> ra m\u00f4i tr\u01b0\u1eddng.<\/li>\n<li><strong>Ph\u00e1t hi\u1ec7n d\u1ec5 d\u00e0ng:<\/strong> K\u1ebb t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c c\u00f4ng c\u1ee5 d\u00f2 qu\u00e9t m\u1ea1ng \u0111\u01a1n gi\u1ea3n (v\u00ed d\u1ee5: Wireshark, Aircrack-ng) \u0111\u1ec3 &#8220;nghe l\u00e9n&#8221; c\u00e1c g\u00f3i tin Probe Request n\u00e0y v\u00e0 ngay l\u1eadp t\u1ee9c l\u1ea5y \u0111\u01b0\u1ee3c <strong>SSID<\/strong> b\u1ecb \u1ea9n c\u1ee7a b\u1ea1n ch\u1ec9 trong v\u00e0i gi\u00e2y.<\/li>\n<li><strong>Gi\u1ea3m tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng:<\/strong> Vi\u1ec7c \u1ea9n <strong>SSID<\/strong> khi\u1ebfn vi\u1ec7c k\u1ebft n\u1ed1i tr\u1edf n\u00ean b\u1ea5t ti\u1ec7n h\u01a1n. M\u1ed7i thi\u1ebft b\u1ecb m\u1edbi ph\u1ea3i \u0111\u01b0\u1ee3c th\u00eam t\u00ean m\u1ea1ng v\u00e0 m\u1eadt kh\u1ea9u th\u1ee7 c\u00f4ng, t\u0103ng nguy c\u01a1 nh\u1eadp sai v\u00e0 g\u00e2y phi\u1ec1n to\u00e1i.<\/li>\n<\/ol>\n<h3><span class=\"ez-toc-section\" id=\"Khuyen-nghi-cua-chuyen-gia-Tap-trung-vao-Ma-hoa-WPA\"><\/span>Khuy\u1ebfn ngh\u1ecb c\u1ee7a chuy\u00ean gia: T\u1eadp trung v\u00e0o M\u00e3 h\u00f3a (WPA)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Theo c\u00e1c chuy\u00ean gia b\u1ea3o m\u1eadt m\u1ea1ng, bi\u1ec7n ph\u00e1p b\u1ea3o v\u1ec7 m\u1ea1ng Wi-Fi th\u1ef1c s\u1ef1 m\u1ea1nh m\u1ebd n\u1eb1m \u1edf l\u1edbp m\u00e3 h\u00f3a v\u00e0 m\u1eadt kh\u1ea9u, ch\u1ee9 kh\u00f4ng ph\u1ea3i \u1edf vi\u1ec7c \u1ea9n <strong>SSID<\/strong>.<\/p>\n<ul>\n<li><strong>S\u1eed d\u1ee5ng WPA3:<\/strong> Lu\u00f4n \u01b0u ti\u00ean chu\u1ea9n b\u1ea3o m\u1eadt WPA3 (ho\u1eb7c WPA2 n\u1ebfu WPA3 ch\u01b0a kh\u1ea3 d\u1ee5ng).<\/li>\n<li><strong>M\u1eadt kh\u1ea9u m\u1ea1nh:<\/strong> \u0110\u00e2y l\u00e0 tuy\u1ebfn ph\u00f2ng th\u1ee7 quan tr\u1ecdng nh\u1ea5t. M\u1eadt kh\u1ea9u n\u00ean d\u00e0i \u00edt nh\u1ea5t 12 k\u00fd t\u1ef1, bao g\u1ed3m ch\u1eef hoa, ch\u1eef th\u01b0\u1eddng, s\u1ed1, v\u00e0 k\u00fd t\u1ef1 \u0111\u1eb7c bi\u1ec7t.<\/li>\n<\/ul>\n<p>Thay v\u00ec d\u00e0nh th\u1eddi gian \u1ea9n <strong>SSID<\/strong> (th\u1ee9 v\u1eabn c\u00f3 th\u1ec3 b\u1ecb ph\u00e1t hi\u1ec7n), b\u1ea1n n\u00ean \u0111\u1ea7u t\u01b0 th\u1eddi gian \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o m\u1eadt kh\u1ea9u c\u1ee7a b\u1ea1n l\u00e0 b\u1ea5t kh\u1ea3 x\u00e2m ph\u1ea1m.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Luu-y-khi-su-dung-va-bao-ve-ID-mang-SSID\"><\/span>L\u01b0u \u00fd khi s\u1eed d\u1ee5ng v\u00e0 b\u1ea3o v\u1ec7 ID m\u1ea1ng SSID<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0110\u1ec3 t\u1ed1i \u01b0u h\u00f3a tr\u1ea3i nghi\u1ec7m m\u1ea1ng v\u00e0 b\u1ea3o m\u1eadt, h\u00e3y ghi nh\u1edb nh\u1eefng l\u1eddi khuy\u00ean th\u1ef1c t\u1ebf sau t\u1eeb <strong><a href=\"https:\/\/interdata.vn\/\">InterData<\/a><\/strong> khi qu\u1ea3n l\u00fd <strong>SSID<\/strong> c\u1ee7a b\u1ea1n:<\/p>\n<ol>\n<li><strong>\u0110\u1ed5i t\u00ean ngay khi l\u1eafp \u0111\u1eb7t:<\/strong> Tuy\u1ec7t \u0111\u1ed1i kh\u00f4ng \u0111\u1ec3 <strong>SSID<\/strong> m\u1eb7c \u0111\u1ecbnh (t\u00ean h\u00e3ng\/m\u1eabu router). H\u00e3y thay n\u00f3 b\u1eb1ng m\u1ed9t t\u00ean ri\u00eang, kh\u00f4ng ti\u1ebft l\u1ed9 th\u00f4ng tin.<\/li>\n<li><strong>\u0110\u1eb7t t\u00ean ph\u00e2n bi\u1ec7t t\u1ea7n s\u1ed1:<\/strong> N\u1ebfu router h\u1ed7 tr\u1ee3 2.4GHz v\u00e0 5GHz, h\u00e3y \u0111\u1eb7t t\u00ean <strong>SSID<\/strong> kh\u00e1c nhau cho m\u1ed7i b\u0103ng t\u1ea7n (VD: <code>MyNet_2G<\/code>, <code>MyNet_5G<\/code>). \u0110i\u1ec1u n\u00e0y cho ph\u00e9p b\u1ea1n \u0111i\u1ec1u ch\u1ec9nh thi\u1ebft b\u1ecb (v\u00ed d\u1ee5: camera an ninh ch\u1ec9 c\u1ea7n 2.4GHz, laptop c\u1ea7n 5GHz t\u1ed1c \u0111\u1ed9 cao) m\u1ed9t c\u00e1ch c\u00f3 ch\u1ee7 \u0111\u00edch.<\/li>\n<li><strong>Ki\u1ec3m tra t\u00ednh t\u01b0\u01a1ng th\u00edch:<\/strong> Khi \u0111\u1eb7t t\u00ean <strong>SSID<\/strong> m\u1edbi, h\u00e3y tr\u00e1nh s\u1eed d\u1ee5ng c\u00e1c k\u00fd t\u1ef1 \u0111\u1eb7c bi\u1ec7t qu\u00e1 ph\u1ee9c t\u1ea1p ho\u1eb7c c\u00e1c k\u00fd t\u1ef1 ngo\u00e0i b\u1ea3ng m\u00e3 Latin, v\u00ec m\u1ed9t s\u1ed1 thi\u1ebft b\u1ecb c\u0169 c\u00f3 th\u1ec3 kh\u00f4ng nh\u1eadn di\u1ec7n \u0111\u01b0\u1ee3c <strong>SSID<\/strong> \u0111\u00f3.<\/li>\n<li><strong>SSID kh\u00f4ng ph\u1ea3i l\u00e0 m\u00e3 PIN:<\/strong> Nh\u1eafc nh\u1edf b\u1ea3n th\u00e2n v\u00e0 gia \u0111\u00ecnh r\u1eb1ng <strong>SSID<\/strong> ch\u1ec9 l\u00e0 t\u00ean g\u1ecdi, kh\u00f4ng ph\u1ea3i l\u00e0 th\u00f4ng tin b\u00ed m\u1eadt. M\u1eadt kh\u1ea9u Wi-Fi m\u1edbi l\u00e0 th\u00f4ng tin c\u1ea7n \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 nghi\u00eam ng\u1eb7t.<\/li>\n<li><strong>Lu\u00f4n \u01b0u ti\u00ean M\u1eadt kh\u1ea9u:<\/strong> Sau c\u00f9ng, m\u1ed9t <strong>SSID<\/strong> c\u00f4ng khai k\u1ebft h\u1ee3p v\u1edbi m\u1eadt kh\u1ea9u WPA3 m\u1ea1nh s\u1ebd an to\u00e0n h\u01a1n nhi\u1ec1u so v\u1edbi m\u1ed9t <strong>SSID<\/strong> b\u1ecb \u1ea9n nh\u01b0ng l\u1ea1i d\u00f9ng m\u1eadt kh\u1ea9u y\u1ebfu.<\/li>\n<\/ol>\n<p>Vi\u1ec7c hi\u1ec3u r\u00f5 SSID l\u00e0 g\u00ec trong m\u1ea1ng wifi v\u00e0 l\u00e0m ch\u1ee7 <strong>SSID<\/strong> kh\u00f4ng ch\u1ec9 gi\u00fap b\u1ea1n k\u1ebft n\u1ed1i m\u1ea1ng d\u1ec5 d\u00e0ng h\u01a1n m\u00e0 c\u00f2n l\u00e0 m\u1ed9t ph\u1ea7n thi\u1ebft y\u1ebfu trong chi\u1ebfn l\u01b0\u1ee3c b\u1ea3o m\u1eadt m\u1ea1ng gia \u0111\u00ecnh ho\u1eb7c v\u0103n ph\u00f2ng. B\u1eb1ng c\u00e1ch \u00e1p d\u1ee5ng c\u00e1c ki\u1ebfn th\u1ee9c v\u00e0 h\u01b0\u1edbng d\u1eabn trong b\u00e0i vi\u1ebft n\u00e0y, b\u1ea1n \u0111\u00e3 th\u1ec3 hi\u1ec7n s\u1ef1 ch\u1ee7 \u0111\u1ed9ng trong vi\u1ec7c ki\u1ec3m so\u00e1t m\u00f4i tr\u01b0\u1eddng m\u1ea1ng kh\u00f4ng d\u00e2y c\u1ee7a m\u00ecnh.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>SSID Wifi l\u00e0 g\u00ec v\u00e0 t\u1ea1i sao n\u00f3 l\u1ea1i quan tr\u1ecdng khi b\u1ea1n k\u1ebft n\u1ed1i Wi-Fi? M\u1ed7i m\u1ea1ng kh\u00f4ng d\u00e2y \u0111\u1ec1u c\u00f3 m\u1ed9t m\u00e3 \u0111\u1ecbnh danh ri\u00eang \u2013 ch\u00ednh l\u00e0 SSID \u2013 gi\u00fap thi\u1ebft b\u1ecb nh\u1eadn di\u1ec7n v\u00e0 ph\u00e2n bi\u1ec7t gi\u1eefa h\u00e0ng ch\u1ee5c m\u1ea1ng xung quanh. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd gi\u00fap b\u1ea1n hi\u1ec3u r\u00f5 SSID<\/p>\n","protected":false},"author":27,"featured_media":34352,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[151],"tags":[],"class_list":["post-34318","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mang"],"_links":{"self":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/34318","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/users\/27"}],"replies":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/comments?post=34318"}],"version-history":[{"count":8,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/34318\/revisions"}],"predecessor-version":[{"id":39168,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/34318\/revisions\/39168"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media\/34352"}],"wp:attachment":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media?parent=34318"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/categories?post=34318"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/tags?post=34318"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}