{"id":25,"date":"2026-09-10T08:06:48","date_gmt":"2026-09-10T08:06:48","guid":{"rendered":"https:\/\/dinhtuanhung.net\/?p=25"},"modified":"2026-09-10T08:07:23","modified_gmt":"2026-09-10T08:07:23","slug":"phan-biet-switch-va-router-diem-khac-biet-co-ban-ban-can-biet","status":"publish","type":"post","link":"https:\/\/dinhtuanhung.net\/?p=25","title":{"rendered":"Ph\u00e2n Bi\u1ec7t Switch v\u00e0 Router: \u0110i\u1ec3m Kh\u00e1c Bi\u1ec7t C\u01a1 B\u1ea3n B\u1ea1n C\u1ea7n Bi\u1ebft"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Trong h\u1ec7 th\u1ed1ng m\u1ea1ng, Switch (B\u1ed9 chuy\u1ec3n m\u1ea1ch) v\u00e0 Router (B\u1ed9 \u0111\u1ecbnh tuy\u1ebfn) l\u00e0 hai thi\u1ebft b\u1ecb quen thu\u1ed9c nh\u01b0ng r\u1ea5t d\u1ec5 g\u00e2y nh\u1ea7m l\u1eabn. C\u1ea3 hai \u0111\u1ec1u c\u00f3 nhi\u1ec1u c\u1ed5ng c\u1eafm d\u00e2y m\u1ea1ng RJ45, nh\u01b0ng nhi\u1ec7m v\u1ee5 th\u1ef1c t\u1ebf c\u1ee7a ch\u00fang l\u1ea1i ho\u00e0n to\u00e0n kh\u00e1c nhau.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/dinhtuanhung.net\/wp-content\/uploads\/2026\/09\/image.png\" alt=\"\" class=\"wp-image-26\" srcset=\"https:\/\/dinhtuanhung.net\/wp-content\/uploads\/2026\/09\/image.png 800w, https:\/\/dinhtuanhung.net\/wp-content\/uploads\/2026\/09\/image-300x169.png 300w, https:\/\/dinhtuanhung.net\/wp-content\/uploads\/2026\/09\/image-768x432.png 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">1. Switch l\u00e0 g\u00ec?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Switch<\/strong> \u0111\u00f3ng vai tr\u00f2 t\u1ea1o ra m\u1ea1ng n\u1ed9i b\u1ed9 (LAN). Thi\u1ebft b\u1ecb n\u00e0y cho ph\u00e9p c\u00e1c m\u00e1y t\u00ednh, m\u00e1y in, camera IP ho\u1eb7c smart TV trong c\u00f9ng m\u1ed9t gia \u0111\u00ecnh, v\u0103n ph\u00f2ng k\u1ebft n\u1ed1i v\u00e0 trao \u0111\u1ed5i d\u1eef li\u1ec7u tr\u1ef1c ti\u1ebfp v\u1edbi nhau v\u1edbi t\u1ed1c \u0111\u1ed9 cao.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Nhi\u1ec7m v\u1ee5 ch\u00ednh:<\/strong> M\u1edf r\u1ed9ng c\u1ed5ng k\u1ebft n\u1ed1i d\u00e2y m\u1ea1ng v\u00e0 ph\u00e2n ph\u1ed1i d\u1eef li\u1ec7u n\u1ed9i b\u1ed9.<\/li>\n\n\n\n<li><strong>C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng:<\/strong> Switch ghi nh\u1edb \u0111\u1ecba ch\u1ec9 v\u1eadt l\u00fd (MAC address) c\u1ee7a t\u1eebng m\u00e1y c\u1eafm v\u00e0o c\u1ed5ng \u0111\u1ec3 g\u1eedi d\u1eef li\u1ec7u ch\u00ednh x\u00e1c \u0111\u1ebfn m\u00e1y nh\u1eadn, tr\u00e1nh l\u00e0m ngh\u1ebdn to\u00e0n m\u1ea1ng.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">2. Router l\u00e0 g\u00ec?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Router<\/strong> \u0111\u00f3ng vai tr\u00f2 l\u00e0m c\u1ea7u n\u1ed1i gi\u1eefa c\u00e1c m\u1ea1ng kh\u00e1c nhau. Ph\u1ed5 bi\u1ebfn nh\u1ea5t l\u00e0 k\u1ebft n\u1ed1i m\u1ea1ng n\u1ed9i b\u1ed9 (LAN) c\u1ee7a b\u1ea1n v\u1edbi m\u1ea1ng Internet to\u00e0n c\u1ea7u (WAN) t\u1eeb nh\u00e0 m\u1ea1ng cung c\u1ea5p.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Nhi\u1ec7m v\u1ee5 ch\u00ednh:<\/strong> \u0110\u1ecbnh tuy\u1ebfn (ch\u1ec9 \u0111\u01b0\u1eddng) cho c\u00e1c g\u00f3i d\u1eef li\u1ec7u \u0111i ra ngo\u00e0i Internet ho\u1eb7c t\u1eeb Internet quay v\u1ec1 \u0111\u00fang thi\u1ebft b\u1ecb y\u00eau c\u1ea7u.<\/li>\n\n\n\n<li><strong>T\u00ednh n\u0103ng k\u00e8m theo:<\/strong> C\u1ea5p ph\u00e1t \u0111\u1ecba ch\u1ec9 IP t\u1ef1 \u0111\u1ed9ng (DHCP), b\u1ea3o m\u1eadt d\u1eef li\u1ec7u v\u1edbi t\u01b0\u1eddng l\u1eeda (Firewall), v\u00e0 th\u01b0\u1eddng t\u00edch h\u1ee3p lu\u00f4n b\u1ed9 ph\u00e1t Wi-Fi.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">3. B\u1ea3ng so s\u00e1nh nhanh Switch v\u00e0 Router<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>\u0110\u1eb7c \u0111i\u1ec3m<\/strong><\/td><td><strong>Switch (B\u1ed9 chuy\u1ec3n m\u1ea1ch)<\/strong><\/td><td><strong>Router (B\u1ed9 \u0111\u1ecbnh tuy\u1ebfn)<\/strong><\/td><\/tr><\/thead><tbody><tr><td><strong>Ph\u1ea1m vi<\/strong><\/td><td>N\u1ed9i b\u1ed9 trong 1 m\u1ea1ng LAN<\/td><td>K\u1ebft n\u1ed1i m\u1ea1ng LAN v\u1edbi Internet (WAN)<\/td><\/tr><tr><td><strong>D\u1eef li\u1ec7u x\u1eed l\u00fd<\/strong><\/td><td>D\u1ef1a v\u00e0o \u0111\u1ecba ch\u1ec9 MAC<\/td><td>D\u1ef1a v\u00e0o \u0111\u1ecba ch\u1ec9 IP<\/td><\/tr><tr><td><strong>T\u1ea7ng m\u1ea1ng (OSI)<\/strong><\/td><td>T\u1ea7ng 2 (Data Link)<\/td><td>T\u1ea7ng 3 (Network)<\/td><\/tr><tr><td><strong>C\u1ea5p ph\u00e1t IP<\/strong><\/td><td>Kh\u00f4ng (ch\u1ec9 chuy\u1ec3n ti\u1ebfp d\u1eef li\u1ec7u)<\/td><td>C\u00f3 (t\u00edch h\u1ee3p m\u00e1y ch\u1ee7 DHCP)<\/td><\/tr><tr><td><strong>B\u1ea3o m\u1eadt<\/strong><\/td><td>C\u01a1 b\u1ea3n<\/td><td>T\u00edch h\u1ee3p Firewall, NAT, ch\u1eb7n truy c\u1eadp<\/td><\/tr><tr><td><strong>Kh\u1ea3 n\u0103ng ph\u00e1t Wi-Fi<\/strong><\/td><td>Kh\u00f4ng<\/td><td>\u0110a s\u1ed1 router gia \u0111\u00ecnh \u0111\u1ec1u c\u00f3<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">4. Khi n\u00e0o b\u1ea1n c\u1ea7n d\u00f9ng thi\u1ebft b\u1ecb n\u00e0o?<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>D\u00f9ng Router khi:<\/strong> B\u1ea1n c\u1ea7n h\u00f2a m\u1ea1ng Internet t\u1eeb nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 (ISP), mu\u1ed1n ph\u00e1t Wi-Fi cho \u0111i\u1ec7n tho\u1ea1i\/laptop v\u00e0 qu\u1ea3n l\u00fd d\u1ea3i IP cho c\u00e1c thi\u1ebft b\u1ecb.<\/li>\n\n\n\n<li><strong>D\u00f9ng th\u00eam Switch khi:<\/strong> Router ch\u00ednh c\u1ee7a b\u1ea1n kh\u00f4ng \u0111\u1ee7 c\u1ed5ng c\u1eafm d\u00e2y LAN (th\u01b0\u1eddng router ch\u1ec9 c\u00f3 3-4 c\u1ed5ng LAN) v\u00e0 b\u1ea1n c\u1ea7n k\u1ebft n\u1ed1i th\u00eam nhi\u1ec1u m\u00e1y t\u00ednh \u0111\u1ec3 b\u00e0n, d\u00e0n camera an ninh hay m\u00e1y in v\u0103n ph\u00f2ng.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">N\u00f3i m\u1ed9t c\u00e1ch ng\u1eafn g\u1ecdn: <strong>Switch k\u1ebft n\u1ed1i c\u00e1c thi\u1ebft b\u1ecb l\u1ea1i v\u1edbi nhau, c\u00f2n Router k\u1ebft n\u1ed1i t\u1ea5t c\u1ea3 c\u00e1c thi\u1ebft b\u1ecb \u0111\u00f3 ra ngo\u00e0i Internet.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Trong h\u1ec7 th\u1ed1ng m\u1ea1ng, Switch (B\u1ed9 chuy\u1ec3n m\u1ea1ch) v\u00e0 Router (B\u1ed9 \u0111\u1ecbnh tuy\u1ebfn) l\u00e0 hai thi\u1ebft b\u1ecb quen thu\u1ed9c nh\u01b0ng r\u1ea5t d\u1ec5 g\u00e2y nh\u1ea7m l\u1eabn. C\u1ea3 hai \u0111\u1ec1u c\u00f3 nhi\u1ec1u c\u1ed5ng c\u1eafm d\u00e2y m\u1ea1ng RJ45, nh\u01b0ng nhi\u1ec7m v\u1ee5 th\u1ef1c t\u1ebf c\u1ee7a ch\u00fang l\u1ea1i ho\u00e0n to\u00e0n kh\u00e1c nhau.<\/p>\n","protected":false},"author":1,"featured_media":26,"comment_status":"open","ping_status":"open","sticky":false,"template":"elementor_theme","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-25","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/dinhtuanhung.net\/index.php?rest_route=\/wp\/v2\/posts\/25","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dinhtuanhung.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dinhtuanhung.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dinhtuanhung.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dinhtuanhung.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=25"}],"version-history":[{"count":1,"href":"https:\/\/dinhtuanhung.net\/index.php?rest_route=\/wp\/v2\/posts\/25\/revisions"}],"predecessor-version":[{"id":27,"href":"https:\/\/dinhtuanhung.net\/index.php?rest_route=\/wp\/v2\/posts\/25\/revisions\/27"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dinhtuanhung.net\/index.php?rest_route=\/wp\/v2\/media\/26"}],"wp:attachment":[{"href":"https:\/\/dinhtuanhung.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=25"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dinhtuanhung.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=25"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dinhtuanhung.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=25"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}