{"id":3889,"date":"2024-12-11T13:59:12","date_gmt":"2024-12-11T06:59:12","guid":{"rendered":"https:\/\/dncloud.net\/blog\/?p=3889"},"modified":"2025-01-03T11:01:03","modified_gmt":"2025-01-03T04:01:03","slug":"ipv4-la-gi","status":"publish","type":"post","link":"https:\/\/dncloud.net\/blog\/ipv4-la-gi\/","title":{"rendered":"IPv4 l\u00e0 g\u00ec? T\u1ed5ng h\u1ee3p ki\u1ebfn th\u1ee9c IPv4 m\u1edbi nh\u1ea5t 2025"},"content":{"rendered":"<p>Trong th\u1eddi \u0111\u1ea1i internet hi\u1ec7n nay, m\u1ed7i thi\u1ebft b\u1ecb hay k\u1ebft n\u1ed1i m\u1ea1ng \u0111\u1ec1u c\u1ea7n \u0111\u1ecba ch\u1ec9 IP \u0111\u1ec3 nh\u1eadn di\u1ec7n v\u00e0 truy\u1ec1n t\u1ea3i d\u1eef li\u1ec7u. IPv4 c\u0169ng l\u00e0 phi\u00ean b\u1ea3n \u0111\u1ea7u ti\u00ean c\u1ee7a \u0111\u1ecba ch\u1ec9 IP. V\u1eady IPv4 l\u00e0 g\u00ec? V\u00e0 b\u1ea1n \u0111\u00e3 bao gi\u1edd th\u1eafc m\u1eafc v\u1ec1 c\u00e1ch ho\u1ea1t \u0111\u1ed9ng hay \u1ee9ng d\u1ee5ng c\u1ee7a n\u00f3 c\u00f9ng DNCLOUD t\u00ecm hi\u1ec3u ngay b\u00e0i vi\u1ebft chi ti\u1ebft d\u01b0\u1edbi \u0111\u00e2y.<\/p>\n<h2>IPv4 l\u00e0 g\u00ec?<\/h2>\n<p>IPv4 hay vi\u1ebft t\u1eaft c\u1ee7a t\u1eeb Internet Protocol version 4 l\u00e0 m\u1ed9t giao th\u1ee9c ph\u1ed5 bi\u1ebfn \u0111\u1ec3 nh\u1eadn di\u1ec7n v\u00e0 truy\u1ec1n t\u1ea3i d\u1eef li\u1ec7u tr\u00ean internet. IPv4 l\u00e0 phi\u00ean b\u1ea3n th\u1ee9 4 c\u1ee7a giao th\u1ee9c <a href=\"https:\/\/vi.wikipedia.org\/wiki\/Internet\" rel=\"noopener\">internet<\/a> v\u00e0 c\u0169ng l\u00e0 phi\u00ean b\u1ea3n \u0111\u00e2u ti\u00ean \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i v\u00e0 l\u00e2u d\u00e0i cho \u0111\u1ebfn ng\u00e0y h\u00f4m nay. \u01afu \u0111i\u1ec3m l\u1edbn c\u1ee7a IPv4 l\u00e0 c\u00f3 th\u1ec3 \u0111\u1ecbnh tuy\u1ebfn c\u00e1c g\u00f3i d\u1eef li\u1ec7u qua c\u00e1c \u0111\u01b0\u1eddng truy\u1ec1n kh\u00e1c nhau khi x\u00e3y ra c\u00e1c s\u1ef1 c\u1ed1 ho\u1eb7c c\u00e1c l\u1ed7i v\u1ec1 \u0111\u1ecbnh tuy\u1ebfn.<\/p>\n<div id=\"attachment_3906\" style=\"width: 1210px\" class=\"wp-caption alignnone\"><img fetchpriority=\"high\" decoding=\"async\" aria-describedby=\"caption-attachment-3906\" class=\"wp-image-3906 size-full\" src=\"https:\/\/dncloud.net\/blog\/wp-content\/uploads\/ipv4-la-gi.png\" alt=\"IPv4 l\u00e0 g\u00ec?\" width=\"1200\" height=\"630\" srcset=\"https:\/\/dncloud.net\/blog\/wp-content\/uploads\/ipv4-la-gi.png 1200w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/ipv4-la-gi-300x158.png.webp 300w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/ipv4-la-gi-1024x538.png.webp 1024w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/ipv4-la-gi-150x79.png.webp 150w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/ipv4-la-gi-768x403.png.webp 768w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/ipv4-la-gi-1170x614.png.webp 1170w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/ipv4-la-gi-585x307.png.webp 585w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" data-smush-webp-fallback=\"{&quot;srcset&quot;:&quot;https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/ipv4-la-gi.png 1200w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/ipv4-la-gi-300x158.png 300w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/ipv4-la-gi-1024x538.png 1024w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/ipv4-la-gi-150x79.png 150w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/ipv4-la-gi-768x403.png 768w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/ipv4-la-gi-1170x614.png 1170w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/ipv4-la-gi-585x307.png 585w&quot;}\" \/><p id=\"caption-attachment-3906\" class=\"wp-caption-text\">IPv4 l\u00e0 g\u00ec?<\/p><\/div>\n<p>IPv4 address s\u1eed d\u1ee5ng \u0111\u1ecba ch\u1ec9 l\u00e0 32-Bit, n\u00f3 c\u00f3 kh\u1ea3 n\u0103ng cung c\u1ea5p kho\u1ea3ng 4,3 t\u1ef7 \u0111\u1ecba ch\u1ec9 duy nh\u1ea5t, l\u00e0 lo\u1ea1i \u0111\u1ecbnh d\u1ea1ng kh\u00e1 quen thu\u1ed9c c\u1ee7a \u0111\u1ecba ch\u1ec9 IP.<\/p>\n<p>IPv4 bao g\u1ed3m 4 d\u00e3y s\u1ed1 m\u1ed7i d\u00e3y s\u1ed1 \u0111\u01b0\u1ee3c c\u00e1ch nhau m\u1ed7i d\u1ea5u ch\u1ea5m, n\u1eb1m trong kho\u1ea3ng t\u1eeb 0 \u0111\u1ebfn 255. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 v\u00ed d\u1ee5 chi ti\u1ebft.<\/p>\n<ul>\n<li>Khi b\u1ea1n nh\u1eadp m\u1ed9t <a href=\"https:\/\/dncloud.net\/blog\/website-la-gi\/\">trang web<\/a> tr\u00ean thanh tr\u00ecnh duy\u1ec7t <strong>(www.example.com)<\/strong> tr\u00ecnh duy\u1ec7t s\u1ebd s\u1eed d\u1ee5ng <a href=\"https:\/\/dncloud.net\/blog\/dns-la-gi\/\">h\u1ec7 th\u1ed1ng DNS<\/a> \u0111\u1ec3 tra c\u1ee9u v\u00e0 chuy\u1ec3n \u0111\u1ed5i t\u00ean mi\u1ec1n \u0111\u00f3 th\u00e0nh \u0111\u1ecba ch\u1ec9 IP n\u00f3 s\u1ebd c\u00f3 d\u1ea1ng nh\u01b0 <strong>(192.168.1.1).<\/strong><\/li>\n<li>\u1ede v\u00ed d\u1ee5 tr\u00ean\u00a0<strong>(192.168.1.1) <\/strong>ch\u00ednh l\u00e0 m\u1ed9t \u0111\u1ecba ch\u1ec9 IPv4 v\u1edbi c\u1ea5u tr\u00fac l\u00e0 4 d\u00e3y s\u1ed1 \u0111\u01b0\u1ee3c c\u00e1ch nhau b\u1edfi d\u1ea5u <strong>(.)<\/strong><\/li>\n<\/ul>\n<p><a href=\"https:\/\/dncloud.net\/blog\/dia-chi-ip-la-gi\/\"><em><strong>\u0110\u1ecdc th\u00eam: \u0110\u1ecba ch\u1ec9 IP l\u00e0 g\u00ec? T\u1ed5ng h\u1ee3p ki\u1ebfn th\u1ee9c v\u1ec1 \u0111\u1ecba ch\u1ec9 IP cho ng\u01b0\u1eddi m\u1edbi<\/strong><\/em><\/a><\/p>\n<h2>Nh\u1eefng \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a \u0111\u1ecba ch\u1ec9 IPv4<\/h2>\n<div id=\"attachment_3907\" style=\"width: 1210px\" class=\"wp-caption alignnone\"><img decoding=\"async\" aria-describedby=\"caption-attachment-3907\" class=\"wp-image-3907 size-full\" src=\"https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/dac-diem-cua-ipv4.jpg.webp\" alt=\"Nh\u1eefng \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a \u0111\u1ecba ch\u1ec9 IPv4\" width=\"1200\" height=\"630\" srcset=\"https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/dac-diem-cua-ipv4.jpg.webp 1200w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/dac-diem-cua-ipv4-300x158.jpg.webp 300w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/dac-diem-cua-ipv4-1024x538.jpg.webp 1024w, https:\/\/dncloud.net\/blog\/wp-content\/uploads\/dac-diem-cua-ipv4-150x79.jpg 150w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/dac-diem-cua-ipv4-768x403.jpg.webp 768w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/dac-diem-cua-ipv4-1170x614.jpg.webp 1170w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/dac-diem-cua-ipv4-585x307.jpg.webp 585w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" loading=\"lazy\" data-smush-webp-fallback=\"{&quot;src&quot;:&quot;https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/dac-diem-cua-ipv4.jpg&quot;,&quot;srcset&quot;:&quot;https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/dac-diem-cua-ipv4.jpg 1200w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/dac-diem-cua-ipv4-300x158.jpg 300w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/dac-diem-cua-ipv4-1024x538.jpg 1024w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/dac-diem-cua-ipv4-150x79.jpg 150w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/dac-diem-cua-ipv4-768x403.jpg 768w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/dac-diem-cua-ipv4-1170x614.jpg 1170w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/dac-diem-cua-ipv4-585x307.jpg 585w&quot;}\" \/><p id=\"caption-attachment-3907\" class=\"wp-caption-text\">Nh\u1eefng \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a \u0111\u1ecba ch\u1ec9 IPv4<\/p><\/div>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 nh\u1eefng \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a \u0111\u1ecba ch\u1ec9 IPv4 \u0111\u01b0\u1ee3c m\u00f4 t\u1ea3 nh\u01b0 sau:<\/p>\n<ul>\n<li>IPv4 l\u00e0 m\u1ed9t giao th\u1ee9c c\u00f3 k\u00edch th\u01b0\u1edbc l\u00e0 32-Bit v\u00e0 \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n d\u01b0\u1edbi d\u1ea1ng 4 nh\u00f3m s\u1ed1 th\u1eadp ph\u00e2n, m\u1ed7i nh\u00f3m bao g\u1ed3m 8 bit \u0111\u01b0\u1ee3c c\u00e1ch nhau b\u1eb1ng m\u1ed7i d\u1ea5u ch\u1ea5m.<\/li>\n<li>IPv4 c\u00f3 t\u1ed5ng c\u1ed9ng 12 tr\u01b0\u1eddng ti\u00eau \u0111\u1ec1 v\u00e0 \u0111\u1eb7c bi\u1ec7t h\u1ed7 tr\u1ee3 t\u00ednh n\u0103ng <strong>broadcasting <\/strong>hay c\u00f2n g\u1ecdi l\u00e0 ph\u00e1t s\u1ed1ng.<\/li>\n<li>IPv4 c\u00f2n h\u1ed7 tr\u1ee3 <strong>VLSM<\/strong> (Variable Length Subnet Mask), v\u00e0 cho ph\u00e9p chia m\u1ea1ng con v\u1edbi \u0111\u1ed9 d\u00e0i linh ho\u1ea1t gi\u00fap t\u1ed1i \u01b0u \u0111\u1ecba ch\u1ec9 IP. Ngo\u00e0i h\u1ed7 tr\u1ee3 VLSM IPv4 c\u00f2n h\u1ed7 tr\u1ee3 Giao th\u1ee9c <strong>ARP<\/strong> (Address Resolution Protocol) gi\u00fap \u00e1nh x\u1ea1 <a href=\"https:\/\/dncloud.net\/blog\/dia-chi-ip-la-gi\/\">\u0111\u1ecba ch\u1ec9 IP<\/a> sang \u0111\u1ecba ch\u1ec9 MAC \u0111\u1ec3 \u0111\u1ecbnh danh thi\u1ebft b\u1ecb trong m\u1ea1ng c\u1ee5c b\u1ed9.<\/li>\n<li>IPv4 c\u00f3 giao th\u1ee9c \u0111\u1ecbnh tuy\u1ebfn \u0111\u01a1n gi\u1ea3n n\u00f3 kh\u1ea3 n\u0103ng \u0111\u1ecbnh tuy\u1ebfn t\u1ed1t cho ph\u00e9p truy\u1ec1n t\u1ea3i d\u1eef li\u1ec7u gi\u1eefa c\u00e1c thi\u1ebft b\u1ecb trong m\u1ea1ng.<\/li>\n<li>IPv4 t\u1eeb tr\u01b0\u1edbc cho t\u1edbi hi\u1ec7n nay \u0111\u00e3 tr\u1edf th\u00e0nh n\u1ec1n t\u1ea3ng ch\u00ednh c\u1ee7a internet v\u1edbi kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch cao gi\u1eefa c\u00e1c thi\u1ebft b\u1ecb.<\/li>\n<\/ul>\n<p>Ngo\u00e0i IPv4 th\u00f4ng th\u01b0\u1eddng c\u00f2n c\u00f3 m\u1ed9t lo\u1ea1i kh\u00e1c l\u00e0 Proxy IPv4 n\u00f3 c\u00f3 t\u00e1c d\u1ee5ng gi\u00fap b\u1ea3o v\u1ec7 danh t\u00ednh c\u1ee7a ng\u01b0\u1eddi d\u00f9ng v\u00e0 che gi\u1ea5u \u0111\u1ecba ch\u1ec9 IP th\u1ef1c v\u00e0 c\u00f3 kh\u1ea3 n\u0103ng truy c\u1eadp nh\u1eefng n\u1ed9i dung h\u1ea1n ch\u1ebf.<\/p>\n<p><a href=\"https:\/\/dncloud.net\/blog\/server-la-gi\/\"><em><strong>\u0110\u1ecdc th\u00eam: Server l\u00e0 g\u00ec? Nh\u1eefng \u0111i\u1ec1u c\u1ea7n bi\u1ebft v\u1ec1 m\u00e1y ch\u1ee7<\/strong><\/em><\/a><\/p>\n<h2>C\u1ea5u tr\u00fac c\u1ee7a \u0111\u1ecba ch\u1ec9 IPv4<\/h2>\n<p>C\u1ea5u tr\u00fac c\u1ee7a \u0111\u1ecba ch\u1ec9 IP bao g\u1ed3m 4 nh\u00f3m s\u1ed1, m\u1ed7i nh\u00f3m th\u01b0\u1eddng c\u00f3 gi\u00e1 tr\u1ecb t\u1eeb 0 \u0111\u1ebfn 255 v\u1edbi \u0111\u01b0\u1ee3c ph\u00e2n c\u00e1ch v\u1edbi nhau b\u1edfi d\u1ea5u <strong>(.)<\/strong> v\u00e0 ch\u00fang s\u1ebd \u0111\u01b0\u1ee3c chia th\u00e0nh 4 c\u1ee5m m\u1ed7i c\u1ee5m c\u00f3 8 bit (\u0110\u01b0\u1ee3c g\u1ecdi l\u00e0 octet) v\u00e0 to\u00e0n b\u1ed9 \u0111\u1ecba ch\u1ec9 IPv4 c\u00f3 \u0111\u1ed9 d\u00e0i 32-bit.<\/p>\n<div id=\"attachment_3908\" style=\"width: 1210px\" class=\"wp-caption alignnone\"><img decoding=\"async\" aria-describedby=\"caption-attachment-3908\" class=\"wp-image-3908 size-full\" src=\"https:\/\/dncloud.net\/blog\/wp-content\/uploads\/cau-truc-dia-chi-ipv4.png\" alt=\"C\u1ea5u tr\u00fac c\u1ee7a \u0111\u1ecba ch\u1ec9 IPv4\" width=\"1200\" height=\"630\" srcset=\"https:\/\/dncloud.net\/blog\/wp-content\/uploads\/cau-truc-dia-chi-ipv4.png 1200w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/cau-truc-dia-chi-ipv4-300x158.png.webp 300w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/cau-truc-dia-chi-ipv4-1024x538.png.webp 1024w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/cau-truc-dia-chi-ipv4-150x79.png.webp 150w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/cau-truc-dia-chi-ipv4-768x403.png.webp 768w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/cau-truc-dia-chi-ipv4-1170x614.png.webp 1170w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/cau-truc-dia-chi-ipv4-585x307.png.webp 585w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" loading=\"lazy\" data-smush-webp-fallback=\"{&quot;srcset&quot;:&quot;https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/cau-truc-dia-chi-ipv4.png 1200w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/cau-truc-dia-chi-ipv4-300x158.png 300w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/cau-truc-dia-chi-ipv4-1024x538.png 1024w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/cau-truc-dia-chi-ipv4-150x79.png 150w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/cau-truc-dia-chi-ipv4-768x403.png 768w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/cau-truc-dia-chi-ipv4-1170x614.png 1170w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/cau-truc-dia-chi-ipv4-585x307.png 585w&quot;}\" \/><p id=\"caption-attachment-3908\" class=\"wp-caption-text\">C\u1ea5u tr\u00fac c\u1ee7a \u0111\u1ecba ch\u1ec9 IPv4<\/p><\/div>\n<p>\u0110\u1ecba ch\u1ec9 IP \u0111\u01b0\u1ee3c chia th\u00e0nh 2 ph\u1ea7n:<\/p>\n<ul>\n<li>Ph\u1ea7n m\u1ea1ng: (Network Part): L\u00e0 ph\u1ea7n x\u00e1c \u0111\u1ecbnh m\u00e0 thi\u1ebft b\u1ecb thu\u1ed9c v\u1ec1.<\/li>\n<li>Ph\u1ea7n m\u00e1y (<a href=\"https:\/\/dncloud.net\/blog\/hosting-la-gi-tong-hop-kien-thuc-ve-hosting\/\">Host<\/a> Part): N\u00f3 gi\u00fap x\u00e1c \u0111\u1ecbnh thi\u1ebft b\u1ecb c\u1ee5 th\u1ec3 trong m\u1ea1ng \u0111\u00f3.V\u00ed d\u1ee5 minh h\u1ecda:<\/li>\n<\/ul>\n<blockquote><p>Ph\u1ea7n network kh\u00f4ng \u0111\u01b0\u1ee3c ph\u00e9p \u0111\u1ed3ng th\u1eddi b\u1eb1ng<strong> 0<\/strong>:<\/p>\n<ul>\n<li>N\u1ebfu \u0111\u1ecba ch\u1ec9 <strong>0.0.0.0<\/strong> v\u00e0 ph\u1ea7n m\u1ea1ng l\u00e0 <strong>0.0.0<\/strong> v\u00e0 ph\u1ea7n <a href=\"https:\/\/dncloud.net\/cloud-hosting\/\">host<\/a> l\u00e0 <strong>1<\/strong> th\u00ec l\u00fac n\u00e0y \u0111\u1ecba ch\u1ec9 l\u00e0 kh\u00f4ng h\u1ee3p l\u1ec7, v\u00ec \u0111\u1ecba ch\u1ec9 n\u00e0y kh\u00f4ng x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c m\u1ed9t m\u1ea1ng h\u1ee3p l\u1ec7 n\u00e0o.<\/li>\n<\/ul>\n<p>N\u1ebfu ph\u1ea7n host ta c\u00f3 t\u1ea5t c\u1ea3 \u0111\u1ecba ch\u1ec9 b\u1eb1ng <strong>0<\/strong>, th\u00ec l\u00fac \u0111\u00f3 ta c\u00f3 m\u1ed9t \u0111\u1ecba ch\u1ec9 m\u1ea1ng, \u0111\u1ecba ch\u1ec9 n\u00e0y d\u00f9ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh cho ch\u00ednh m\u1ed9t m\u1ea1ng \u0111\u00f3 v\u00e0 kh\u00f4ng th\u1ec3 g\u00e1n cho b\u1ea5t k\u00ec thi\u1ebft b\u1ecb n\u00e0o.<\/p>\n<ul>\n<li>V\u00ed d\u1ee5: ta c\u00f3 \u0111\u1ecba ch\u1ec9 m\u1ea1ng l\u00e0 <strong>193.167.1.0<\/strong> (th\u00ec \u0111\u1ecba ch\u1ec9 n\u00e0y ch\u1ec9 \u0111\u01b0\u1ee3c g\u00e1n cho m\u1ea1ng con <strong>193.167.1.0<\/strong> n\u00f3 kh\u00f4ng th\u1ec3 g\u00e1n \u0111\u01b0\u1ee3c cho m\u1ed9t host<\/li>\n<\/ul>\n<p>Tr\u01b0\u1eddng h\u1ee3p n\u1ebfu ph\u1ea7n host c\u00f3 t\u1ea5t c\u1ea3 gi\u00e1 tr\u1ecb b\u1eb1ng <strong>1<\/strong> th\u00ec ta c\u00f3 m\u1ed9t \u0111\u1ecba ch\u1ec9 <strong> broadcast <\/strong>(\u0110\u1ecba ch\u1ec9 n\u00e0y d\u00f9ng \u0111\u1ec3 g\u1eedi d\u1eef li\u1ec7u \u0111\u1ebfn t\u1ea5t c\u1ea3 c\u00e1c thi\u1ebft b\u1ecb trong m\u1ea1ng).<\/p>\n<ul>\n<li>V\u00ed d\u1ee5: Broadcast c\u00f3 \u0111\u1ecba ch\u1ec9 l\u00e0 <strong>193.167.1.255<\/strong> (\u0110\u1ecba ch\u1ec9 n\u00e0y l\u00e0 broadcast cho m\u1ea1ng <strong>193.167.1.0<\/strong>).<\/li>\n<\/ul>\n<\/blockquote>\n<p><a href=\"https:\/\/dncloud.net\/blog\/hosting-doanh-nghiep-la-gi\/\"><em><strong>\u0110\u1ecdc th\u00eam: Hosting doanh nghi\u1ec7p l\u00e0 g\u00ec?<\/strong><\/em><\/a><\/p>\n<h2>\u0110\u1ecba ch\u1ec9 IPv4 c\u00f3 bao nhi\u00eau l\u1edbp?<\/h2>\n<p>\u0110\u1ecba ch\u1ec9 IPv4 c\u00f3 bao g\u1ed3m 5 l\u1edbp, bao g\u1ed3m <strong>(L\u1edbp A,B,C,D,E)<\/strong> d\u01b0\u1edbi \u0111\u00e2y l\u00e0 chi ti\u1ebft 5 l\u1edbp c\u1ee7a IPv4:<\/p>\n\n<div class=\"pcrstb-wrap\"><table id=\"tablepress-20\" class=\"tablepress tablepress-id-20\">\n<tbody class=\"row-striping row-hover\">\n<tr class=\"row-1\">\n\t<td class=\"column-1\">IP c\u1ee7a l\u1edbp A<\/td><td class=\"column-2\">T\u1eeb 1 -> 126<\/td>\n<\/tr>\n<tr class=\"row-2\">\n\t<td class=\"column-1\">IP c\u1ee7a l\u1edbp B<\/td><td class=\"column-2\">T\u1eeb 128 -> 191<\/td>\n<\/tr>\n<tr class=\"row-3\">\n\t<td class=\"column-1\">IP c\u1ee7a l\u1edbp C<\/td><td class=\"column-2\">T\u1eeb 192 -> 223<\/td>\n<\/tr>\n<tr class=\"row-4\">\n\t<td class=\"column-1\">IP c\u1ee7a l\u1edbp D<\/td><td class=\"column-2\">T\u1eeb 240 -> 239<\/td>\n<\/tr>\n<tr class=\"row-5\">\n\t<td class=\"column-1\">IP c\u1ee7a l\u1edbp E<\/td><td class=\"column-2\">T\u1eeb 240 -> 255<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n\n<p>Trong \u0111\u00f3:<\/p>\n<ul>\n<li>L\u1edbp A, B v\u00e0 C \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 g\u00e1n cho c\u00e1c host.<\/li>\n<li>L\u1edbp C l\u00e0 l\u1edbp \u0111\u1ecba ch\u1ec9 Multicast<\/li>\n<li>L\u1edbp E th\u01b0\u1eddng s\u1ebd kh\u00f4ng s\u1eed d\u1ee5ng t\u1edbi.<\/li>\n<\/ul>\n<p><a href=\"https:\/\/dncloud.net\/blog\/hosting-la-gi-tong-hop-kien-thuc-ve-hosting\/\"><em><strong>\u0110\u1ecdc th\u00eam: Hosting l\u00e0 g\u00ec? T\u1ed1ng h\u1ee3p ki\u1ebfn th\u1ee9c hosting cho ng\u01b0\u1eddi m\u1edbi<\/strong><\/em><\/a><\/p>\n<h3>1. L\u1edbp A<\/h2>\n<div id=\"attachment_3909\" style=\"width: 1210px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-3909\" class=\"wp-image-3909 size-full\" src=\"https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/lop-a-dia-chi-ipv4.jpg.webp\" alt=\"L\u1edbp A IPv4\" width=\"1200\" height=\"630\" srcset=\"https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/lop-a-dia-chi-ipv4.jpg.webp 1200w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/lop-a-dia-chi-ipv4-300x158.jpg.webp 300w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/lop-a-dia-chi-ipv4-1024x538.jpg.webp 1024w, https:\/\/dncloud.net\/blog\/wp-content\/uploads\/lop-a-dia-chi-ipv4-150x79.jpg 150w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/lop-a-dia-chi-ipv4-768x403.jpg.webp 768w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/lop-a-dia-chi-ipv4-1170x614.jpg.webp 1170w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/lop-a-dia-chi-ipv4-585x307.jpg.webp 585w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" data-smush-webp-fallback=\"{&quot;src&quot;:&quot;https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/lop-a-dia-chi-ipv4.jpg&quot;,&quot;srcset&quot;:&quot;https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/lop-a-dia-chi-ipv4.jpg 1200w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/lop-a-dia-chi-ipv4-300x158.jpg 300w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/lop-a-dia-chi-ipv4-1024x538.jpg 1024w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/lop-a-dia-chi-ipv4-150x79.jpg 150w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/lop-a-dia-chi-ipv4-768x403.jpg 768w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/lop-a-dia-chi-ipv4-1170x614.jpg 1170w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/lop-a-dia-chi-ipv4-585x307.jpg 585w&quot;}\" \/><p id=\"caption-attachment-3909\" class=\"wp-caption-text\">L\u1edbp A IPv4<\/p><\/div>\n<ul>\n<li>\u0110\u1ecba ch\u1ec9 IP c\u1ee7a l\u1edbp A c\u00f3 ph\u1ea7n m\u1ea1ng l\u00e0 ph\u1ea7n octet \u0111\u1ea7u, c\u00f2n 4 ph\u1ea7n sau l\u00e0 ph\u1ea7n host.<\/li>\n<li>Bit \u0111\u1ea7u c\u1ee7a l\u1edbp \u0111\u1ecba ch\u1ec9 IP l\u1edbp A lu\u00f4n m\u1eb7c \u0111\u1ecbnh l\u00e0 b\u1eb1ng 0.<\/li>\n<li>C\u00e1c \u0111\u1ecba ch\u1ec9 IP c\u1ee7a l\u1edbp A d\u1ea3i m\u1ea1ng t\u1eeb: 1.0.0.0 t\u1edbi 126.0.0.0.<\/li>\n<li>\u0110\u1ecba ch\u1ec9 127.0.0.0 \u0111\u01b0\u1ee3c d\u00e0nh ri\u00eang cho m\u1ea1ng loopback.<\/li>\n<li>S\u1ed1 l\u01b0\u1ee3ng \u0111\u1ecba ch\u1ec9 host kh\u1ea3 d\u1ee5ng l\u00e0 24 bit\u00a0trong m\u1ed7i m\u1ea1ng l\u1edbp A l\u00e0 2^24 &#8211; 2<\/li>\n<\/ul>\n<h3>2. L\u1edbp B<\/h2>\n<div id=\"attachment_3910\" style=\"width: 1210px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-3910\" class=\"wp-image-3910 size-full\" src=\"https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/lop-b-dia-chi-ipv4.jpg.webp\" alt=\"L\u1edbp B IPv4\" width=\"1200\" height=\"630\" srcset=\"https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/lop-b-dia-chi-ipv4.jpg.webp 1200w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/lop-b-dia-chi-ipv4-300x158.jpg.webp 300w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/lop-b-dia-chi-ipv4-1024x538.jpg.webp 1024w, https:\/\/dncloud.net\/blog\/wp-content\/uploads\/lop-b-dia-chi-ipv4-150x79.jpg 150w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/lop-b-dia-chi-ipv4-768x403.jpg.webp 768w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/lop-b-dia-chi-ipv4-1170x614.jpg.webp 1170w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/lop-b-dia-chi-ipv4-585x307.jpg.webp 585w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" data-smush-webp-fallback=\"{&quot;src&quot;:&quot;https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/lop-b-dia-chi-ipv4.jpg&quot;,&quot;srcset&quot;:&quot;https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/lop-b-dia-chi-ipv4.jpg 1200w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/lop-b-dia-chi-ipv4-300x158.jpg 300w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/lop-b-dia-chi-ipv4-1024x538.jpg 1024w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/lop-b-dia-chi-ipv4-150x79.jpg 150w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/lop-b-dia-chi-ipv4-768x403.jpg 768w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/lop-b-dia-chi-ipv4-1170x614.jpg 1170w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/lop-b-dia-chi-ipv4-585x307.jpg 585w&quot;}\" \/><p id=\"caption-attachment-3910\" class=\"wp-caption-text\">L\u1edbp B IPv4<\/p><\/div>\n<ul>\n<li>\u0110\u1ecba ch\u1ec9 IP c\u1ee7a l\u1edbp B c\u00f3 ph\u1ea7n m\u1ea1ng l\u00e0 2 ph\u1ea7n octet \u0111\u1ea7u, c\u00f2n 2 ph\u1ea7n sau l\u00e0 ph\u1ea7n host.<\/li>\n<li>2 bit \u0111\u1ea7u c\u1ee7a \u0111\u1ecba ch\u1ec9 IP l\u1edbp B \u0111\u01b0\u1ee3c m\u1eb7c \u0111\u1ecbnh l\u00e0 10.<\/li>\n<li>\u0110\u1ecba ch\u1ec9 IP c\u1ee7a l\u1edbp B c\u00f3 d\u1ea3i m\u1ea1ng t\u1eeb: 128.0.0.0 \u0111\u1ebfn 191.255.0.0.<\/li>\n<li>Ph\u1ea7n host c\u1ee7a l\u1edbp B c\u00f3 2^16 &#8211; 2.<\/li>\n<\/ul>\n<h3>3. L\u1edbp C<\/h2>\n<div id=\"attachment_3911\" style=\"width: 1210px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-3911\" class=\"wp-image-3911 size-full\" src=\"https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/lop-c-dia-chi-ipv4.jpg.webp\" alt=\"L\u1edbp C IPv4\" width=\"1200\" height=\"630\" srcset=\"https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/lop-c-dia-chi-ipv4.jpg.webp 1200w, https:\/\/dncloud.net\/blog\/wp-content\/uploads\/lop-c-dia-chi-ipv4-300x158.jpg 300w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/lop-c-dia-chi-ipv4-1024x538.jpg.webp 1024w, https:\/\/dncloud.net\/blog\/wp-content\/uploads\/lop-c-dia-chi-ipv4-150x79.jpg 150w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/lop-c-dia-chi-ipv4-768x403.jpg.webp 768w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/lop-c-dia-chi-ipv4-1170x614.jpg.webp 1170w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/lop-c-dia-chi-ipv4-585x307.jpg.webp 585w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" data-smush-webp-fallback=\"{&quot;src&quot;:&quot;https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/lop-c-dia-chi-ipv4.jpg&quot;,&quot;srcset&quot;:&quot;https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/lop-c-dia-chi-ipv4.jpg 1200w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/lop-c-dia-chi-ipv4-300x158.jpg 300w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/lop-c-dia-chi-ipv4-1024x538.jpg 1024w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/lop-c-dia-chi-ipv4-150x79.jpg 150w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/lop-c-dia-chi-ipv4-768x403.jpg 768w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/lop-c-dia-chi-ipv4-1170x614.jpg 1170w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/lop-c-dia-chi-ipv4-585x307.jpg 585w&quot;}\" \/><p id=\"caption-attachment-3911\" class=\"wp-caption-text\">L\u1edbp C IPv4<\/p><\/div>\n<ul>\n<li>\u0110\u1ecba ch\u1ec9 IP l\u1edbp C s\u1eed d\u1ee5ng 3 ph\u1ea7n octet \u0111\u1ea7u l\u00e0 ph\u1ea7n network, 1 ph\u1ea7n octet cu\u1ed1i l\u00e0 ph\u1ea7n <a href=\"https:\/\/dncloud.net\/blog\/hosting-nvme-la-gi\/\">host<\/a>.<\/li>\n<li>3 bit \u0111\u1ea7u ti\u00ean c\u1ee7a l\u1edbp C \u0111\u01b0\u1ee3c m\u1eb7c \u0111\u1ecbnh l\u00e0 110.<\/li>\n<li>C\u00e1c \u0111\u1ecba ch\u1ec9 IP c\u1ee7a l\u1edbp C c\u00f3 d\u1ea3i m\u1ea1ng t\u1eeb 192.0.0.0 \u0111\u1ebfn 223.255.255.0.<\/li>\n<li>Ph\u1ea7n host c\u1ee7a l\u1edbp C c\u00f3 8 bit v\u00ec v\u1eady m\u1ed7i m\u1ea1ng l\u1edbp C 2^8 &#8211; 2.<\/li>\n<\/ul>\n<h3>4. L\u1edbp D<\/h2>\n<ul>\n<li>L\u1edbp D kh\u00f4ng s\u1eed d\u1ee5ng network v\u00e0 ph\u1ea7n host ri\u00eang bi\u1ec7t m\u00e0 d\u00e0nh cho <strong>multicast<\/strong> (\u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 ph\u00e1t s\u00f3ng nh\u00f3m).<\/li>\n<li>4 bit \u0111\u1ea7u ti\u00ean c\u1ee7a \u0111\u1ecba ch\u1ec9 IPv4 l\u1edbp D l\u00e0 1110.<\/li>\n<li>\u0110\u1ecba ch\u1ec9 l\u1edbp D n\u1eb1m trong d\u00e3i 224.0.0.0 \u0111\u1ebfn 239.255.255.255.<\/li>\n<li>\u0110\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 <strong>multicast<\/strong>, kh\u00f4ng d\u00e0nh cho c\u00e1c m\u1ea1ng th\u00f4ng th\u01b0\u1eddng.<\/li>\n<\/ul>\n<h3>5. L\u1edbp E<\/h2>\n<ul>\n<li>L\u1edbp E \u0111\u01b0\u1ee3c d\u00e0nh ri\u00eang cho c\u00e1c th\u1eed nghi\u1ec7m v\u00e0 nghi\u00ean c\u1ee9u.<\/li>\n<li>V\u00e0 b\u1eaft \u0111\u1ea7u t\u1eeb 240.0.0.0 tr\u1edf \u0111i.<\/li>\n<li>\u0110\u1eb7c bi\u1ec7t kh\u00f4ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00e1c m\u1ea1ng th\u1ef1c t\u1ebf n\u00f3 d\u00f9ng trong c\u00e1c cu\u1ed9c th\u1eed nghi\u1ec7m ho\u1eb7c nghi\u00ean c\u1ee9u.<\/li>\n<\/ul>\n<h2>IPv4 c\u00f3 nh\u1eefng \u01b0u v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m g\u00ec?<\/h2>\n<h3>1. \u01afu \u0111i\u1ec3m c\u1ee7a IPv4 l\u00e0 g\u00ec?<\/h2>\n<div id=\"attachment_3912\" style=\"width: 1210px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-3912\" class=\"wp-image-3912 size-full\" src=\"https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/uu-diem-cua-ipv4.jpg.webp\" alt=\"\u01afu \u0111i\u1ec3m c\u1ee7a IPv4\" width=\"1200\" height=\"630\" srcset=\"https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/uu-diem-cua-ipv4.jpg.webp 1200w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/uu-diem-cua-ipv4-300x158.jpg.webp 300w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/uu-diem-cua-ipv4-1024x538.jpg.webp 1024w, https:\/\/dncloud.net\/blog\/wp-content\/uploads\/uu-diem-cua-ipv4-150x79.jpg 150w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/uu-diem-cua-ipv4-768x403.jpg.webp 768w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/uu-diem-cua-ipv4-1170x614.jpg.webp 1170w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/uu-diem-cua-ipv4-585x307.jpg.webp 585w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" data-smush-webp-fallback=\"{&quot;src&quot;:&quot;https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/uu-diem-cua-ipv4.jpg&quot;,&quot;srcset&quot;:&quot;https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/uu-diem-cua-ipv4.jpg 1200w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/uu-diem-cua-ipv4-300x158.jpg 300w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/uu-diem-cua-ipv4-1024x538.jpg 1024w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/uu-diem-cua-ipv4-150x79.jpg 150w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/uu-diem-cua-ipv4-768x403.jpg 768w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/uu-diem-cua-ipv4-1170x614.jpg 1170w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/uu-diem-cua-ipv4-585x307.jpg 585w&quot;}\" \/><p id=\"caption-attachment-3912\" class=\"wp-caption-text\">\u01afu \u0111i\u1ec3m c\u1ee7a IPv4<\/p><\/div>\n<ul>\n<li><strong>\u0110\u1ecbnh tuy\u1ebfn \u0111\u01a1n gi\u1ea3n:<\/strong> IPv4 gi\u00fap h\u1ed7 tr\u1ee3 \u0111\u1ecbnh tuy\u1ebfn d\u1ec5 d\u00e0ng v\u00e0 \u0111\u1ea3m b\u1ea3o c\u00e1c kh\u1ea3 n\u0103ng k\u1ebft n\u1ed1i linh ho\u1ea1t.<\/li>\n<li><strong>\u0110\u01b0\u1ee3c t\u00edch h\u1ee3p v\u00e0 h\u1ed7 tr\u1ee3 r\u1ed9ng r\u00e3i tr\u00ean nhi\u1ec1u thi\u1ebft b\u1ecb:<\/strong> IPv4 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i tr\u00ean h\u00e0ng tri\u1ec7u thi\u1ebft b\u1ecb trong qu\u00e1 kh\u1ee9 c\u0169ng nh\u01b0 hi\u1ec7n t\u1ea1i. Cho th\u1ea5y n\u00f3 c\u00f3 t\u00ednh t\u01b0\u01a1ng th\u00edch cao v\u00e0 h\u1ed7 tr\u1ee3 r\u1ea5t nhi\u1ec1u h\u1ec7 \u0111i\u1ec1u h\u00e0nh c\u0169ng nh\u01b0 \u1ee9ng d\u1ee5ng v\u00e0 c\u00e1c thi\u1ebft b\u1ecb m\u1ea1ng.<\/li>\n<li><strong>D\u1ec5 d\u00e0ng ghi nh\u1edb:<\/strong> IPv4 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i nh\u1edd kh\u1ea3 n\u0103ng d\u1ec5 d\u00e0ng ghi nh\u1edb v\u00ec ch\u00fang \u0111\u01b0\u1ee3c bi\u1ec3u d\u1ea1ng d\u01b0\u1edbi 4 ch\u1eef s\u1ed1 th\u1eadp ph\u00e2n v\u00e0 \u0111\u01b0\u1ee3c ng\u0103n c\u00e1ch b\u1edfi d\u1ea5u ch\u1ea5m so v\u1edbi IPv6.<\/li>\n<li><strong>IPv4 l\u00e0 m\u1ed9t giao th\u1ee9c connectionless: <\/strong>\u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 n\u00f3 kh\u00f4ng c\u1ea7n y\u00eau c\u1ea7u thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i gi\u1eefa 2 thi\u1ebft b\u1ecb tr\u01b0\u1edbc khi truy\u1ec1n t\u1ea3i d\u1eef li\u1ec7u \u0111i. N\u00f3 kh\u00e1 thu\u1eadn cho vi\u1ec7c truy\u1ec1n d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c g\u1eedi \u0111i nhanh ch\u00f3ng.<\/li>\n<li><strong>Quy\u1ec1n ri\u00eang t\u01b0 v\u00e0 b\u1ea3o m\u1eadt:<\/strong> L\u1ee3i \u00edch c\u1ee7a IPv4 l\u00e0 kh\u1ea3 n\u0103ng k\u1ebft h\u1ee3p c\u00e1c giao th\u1ee9c b\u1ea3o m\u1eadt ph\u1ed5 bi\u1ebfn nh\u01b0 <strong>IPsec<\/strong>, <strong>NAT<\/strong>, v\u00e0 <strong>TLS\/<a href=\"https:\/\/dncloud.net\/chung-chi-ssl\/\">SSL<\/a><\/strong> \u0111\u1ec3 b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u v\u00e0 \u1ea9n \u0111\u1ecba ch\u1ec9 IP th\u1ef1c, n\u00f3 c\u00f2n \u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n khi truy\u1ec1n th\u00f4ng tin qua m\u1ea1ng.<\/li>\n<li>Ngo\u00e0i ra IPv4 c\u00f2n h\u1ed7 tr\u1ee3 t\u1ea1o l\u1edbp giao ti\u1ebfp \u1ea3o \u0111\u01a1n gi\u1ea3n tr\u00ean nhi\u1ec1u thi\u1ebft b\u1ecb gi\u00fap t\u1ea1o k\u1ebft n\u1ed1i truy\u1ec1n th\u00f4ng d\u1ec5 d\u00e0ng gi\u1eefa c\u00e1c thi\u1ec7t b\u1ecb trong internet.<\/li>\n<\/ul>\n<p><a href=\"https:\/\/dncloud.net\/blog\/ssl-la-gi\/\"><em><strong>\u0110\u1ecdc th\u00eam: SSL l\u00e0 g\u00ec? T\u1ea1i sao n\u00f3i SSL quan tr\u1ecdng cho website<\/strong><\/em><\/a><\/p>\n<h3>2. Nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a IPv4 l\u00e0 g\u00ec?<\/h2>\n<div id=\"attachment_3913\" style=\"width: 1210px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-3913\" class=\"wp-image-3913 size-full\" src=\"https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/nhuoc-diem-cua-ipv4.jpg.webp\" alt=\"Nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a IPv4\" width=\"1200\" height=\"630\" srcset=\"https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/nhuoc-diem-cua-ipv4.jpg.webp 1200w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/nhuoc-diem-cua-ipv4-300x158.jpg.webp 300w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/nhuoc-diem-cua-ipv4-1024x538.jpg.webp 1024w, https:\/\/dncloud.net\/blog\/wp-content\/uploads\/nhuoc-diem-cua-ipv4-150x79.jpg 150w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/nhuoc-diem-cua-ipv4-768x403.jpg.webp 768w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/nhuoc-diem-cua-ipv4-1170x614.jpg.webp 1170w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/nhuoc-diem-cua-ipv4-585x307.jpg.webp 585w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" data-smush-webp-fallback=\"{&quot;src&quot;:&quot;https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/nhuoc-diem-cua-ipv4.jpg&quot;,&quot;srcset&quot;:&quot;https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/nhuoc-diem-cua-ipv4.jpg 1200w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/nhuoc-diem-cua-ipv4-300x158.jpg 300w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/nhuoc-diem-cua-ipv4-1024x538.jpg 1024w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/nhuoc-diem-cua-ipv4-150x79.jpg 150w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/nhuoc-diem-cua-ipv4-768x403.jpg 768w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/nhuoc-diem-cua-ipv4-1170x614.jpg 1170w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/nhuoc-diem-cua-ipv4-585x307.jpg 585w&quot;}\" \/><p id=\"caption-attachment-3913\" class=\"wp-caption-text\">Nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a IPv4<\/p><\/div>\n<p>Ngo\u00e0i r\u1ea5t nhi\u1ec1u nh\u1eefng \u01b0u \u0111i\u1ec3m m\u00e0 <a href=\"https:\/\/dncloud.net\/\">DNCLOUD<\/a> \u0111\u00e3 k\u1ec3 \u0111\u1ebfn th\u00ec IPv4 v\u1eabn c\u00f2n c\u00f3 m\u1ed9t s\u1ed1 nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ea7n \u0111\u01b0\u1ee3c n\u00f3i \u0111\u1ebfn nh\u01b0:<\/p>\n<ul>\n<li><strong>Qu\u00e1 t\u1ea3i \u0111\u1ecba ch\u1ec9 IP:<\/strong> V\u1edbi kho\u1ea3ng 4,3 t\u1ec9 \u0111\u1ecba ch\u1ec9 IP, IPv4 ng\u00e0y kh\u00f4ng \u0111\u00e1p \u1ee9ng \u0111\u1ee7 nhu c\u1ea7u c\u00e0ng t\u0103ng c\u1ee7a c\u00e1c thi\u1ebft b\u1ecb k\u1ebft n\u1ed1i.<\/li>\n<li><strong>H\u1ea1n ch\u1ebf c\u00e1c kh\u1ea3 n\u0103ng b\u1ea3o m\u1eadt t\u00edch h\u1ee3p:<\/strong> IPv4 kh\u00f4ng c\u00f3 c\u00f3 ch\u1ebf b\u1ea3o m\u1eadt t\u00edch h\u1ee3p n\u00f3 ph\u1ea3i t\u1ef1 c\u1ea5u h\u00ecnh b\u1eb1ng tay n\u00ean d\u1eabn \u0111\u1ebfn h\u1eadu qu\u1ea3 l\u00e0m d\u1eef li\u1ec7u d\u1ec5 b\u1ecb t\u1ea5n c\u00f4ng.<\/li>\n<\/ul>\n<h2>So s\u00e1nh \u0111\u1ecba ch\u1ec9 IPv4 v\u00e0 \u0111\u1ecba ch\u1ec9 IPv6 c\u00f3 g\u00ec kh\u00e1c nhau tr\u00ean internet<\/h2>\n<div id=\"attachment_3914\" style=\"width: 1210px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-3914\" class=\"wp-image-3914 size-full\" src=\"https:\/\/dncloud.net\/blog\/wp-content\/uploads\/so-sanh-ipv4-va-ipv6.png\" alt=\"So s\u00e1nh \u0111\u1ecba ch\u1ec9 IPv4 v\u00e0 \u0111\u1ecba ch\u1ec9 IPv6 c\u00f3 g\u00ec kh\u00e1c nhau tr\u00ean internet\" width=\"1200\" height=\"630\" srcset=\"https:\/\/dncloud.net\/blog\/wp-content\/uploads\/so-sanh-ipv4-va-ipv6.png 1200w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/so-sanh-ipv4-va-ipv6-300x158.png.webp 300w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/so-sanh-ipv4-va-ipv6-1024x538.png.webp 1024w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/so-sanh-ipv4-va-ipv6-150x79.png.webp 150w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/so-sanh-ipv4-va-ipv6-768x403.png.webp 768w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/so-sanh-ipv4-va-ipv6-1170x614.png.webp 1170w, https:\/\/dncloud.net\/blog\/wp-content\/smush-webp\/so-sanh-ipv4-va-ipv6-585x307.png.webp 585w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" data-smush-webp-fallback=\"{&quot;srcset&quot;:&quot;https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/so-sanh-ipv4-va-ipv6.png 1200w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/so-sanh-ipv4-va-ipv6-300x158.png 300w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/so-sanh-ipv4-va-ipv6-1024x538.png 1024w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/so-sanh-ipv4-va-ipv6-150x79.png 150w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/so-sanh-ipv4-va-ipv6-768x403.png 768w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/so-sanh-ipv4-va-ipv6-1170x614.png 1170w, https:\\\/\\\/dncloud.net\\\/blog\\\/wp-content\\\/uploads\\\/so-sanh-ipv4-va-ipv6-585x307.png 585w&quot;}\" \/><p id=\"caption-attachment-3914\" class=\"wp-caption-text\">So s\u00e1nh \u0111\u1ecba ch\u1ec9 IPv4 v\u00e0 \u0111\u1ecba ch\u1ec9 IPv6 c\u00f3 g\u00ec kh\u00e1c nhau tr\u00ean internet<\/p><\/div>\n<p>Ngo\u00e0i \u0111\u1ecba ch\u1ec9 IPv4, c\u00f2n c\u00f3 m\u1ed9t lo\u1ea1i \u0111\u1ecba ch\u1ec9 IPv6 n\u00f3 \u0111\u01b0\u1ee3c t\u1ea1o ra \u0111\u1ec3 gi\u00fap gi\u1ea3i quy\u1ebft c\u00e1c m\u1ed1i lo ng\u1ea1i v\u1ec1 t\u00ecnh tr\u1ea1ng thi\u1ebfu h\u1ee5t IP. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 b\u1ea3ng so s\u00e1nh gi\u1eefa \u0111\u1ecba ch\u1ec9 IPv4 v\u00e0 \u0111\u1ecba ch\u1ec9 IPv6 tr\u00ean internet.<\/p>\n\n<div class=\"pcrstb-wrap\"><table id=\"tablepress-21\" class=\"tablepress tablepress-id-21\">\n<tbody class=\"row-striping row-hover\">\n<tr class=\"row-1\">\n\t<td class=\"column-1\">Ti\u00eau ch\u00ed <\/td><td class=\"column-2\">IPv4<\/td><td class=\"column-3\">IPv6<\/td>\n<\/tr>\n<tr class=\"row-2\">\n\t<td class=\"column-1\">\u0110\u1ed9 d\u00e0i \u0111\u1ecba ch\u1ec9<\/td><td class=\"column-2\">32 bit (4 octet), 4 ph\u1ea7n t\u00e1ch bi\u1ec7t b\u1eb1ng d\u1ea5u ch\u1ea5m<\/td><td class=\"column-3\">128 bit (8 nh\u00f3m, m\u1ed7i nh\u00f3m 4 ch\u1eef s\u1ed1 hexa t\u00e1ch bi\u1ec7t b\u1eb1ng d\u1ea5u hai ch\u1ea5m<\/td>\n<\/tr>\n<tr class=\"row-3\">\n\t<td class=\"column-1\">\u0110\u1ecbnh d\u1ea1ng<\/td><td class=\"column-2\">S\u1eed d\u1ee5ng \u0111\u1ecba ch\u1ec9 s\u1ed1<\/td><td class=\"column-3\">S\u1eed d\u1ee5ng c\u1ea3 \u0111\u1ecba ch\u1ec9 ch\u1eef v\u00e0 \u0111\u1ecba ch\u1ec9 s\u1ed1<\/td>\n<\/tr>\n<tr class=\"row-4\">\n\t<td class=\"column-1\">S\u1ed1 l\u01b0\u1ee3ng<\/td><td class=\"column-2\">Kho\u1ea3ng 4,3 t\u1ec9 \u0111\u1ecba ch\u1ec9<\/td><td class=\"column-3\">Kho\u1ea3ng 340 undecillion (3.4 \u00d7 10^38) \u0111\u1ecba ch\u1ec9<\/td>\n<\/tr>\n<tr class=\"row-5\">\n\t<td class=\"column-1\">Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng<\/td><td class=\"column-2\">B\u1ecb gi\u1edbi h\u1ea1n s\u1ed1 l\u01b0\u1ee3ng \u0111\u1ecba ch\u1ec9, kh\u00f4ng \u0111\u1ee7 cho t\u1ea5t c\u1ea3 thi\u1ebft b\u1ecb k\u1ebft n\u1ed1i internet<\/td><td class=\"column-3\">D\u1ec5 d\u00e0ng m\u1edf r\u1ed9ng cho t\u1ea5t c\u1ea3 thi\u1ebft b\u1ecb k\u1ebft n\u1ed1i internet \u1edf hi\u1ec7n t\u1ea1i v\u00e0 t\u01b0\u01a1ng lai<\/td>\n<\/tr>\n<tr class=\"row-6\">\n\t<td class=\"column-1\">C\u1ea5u tr\u00fac<\/td><td class=\"column-2\">Chi th\u00e0nh 5 l\u1edbp (A,B,C,D,E)<\/td><td class=\"column-3\">Kh\u00f4ng chia theo l\u1edbp m\u00e0 s\u1eed d\u1ee5ng c\u00e1c nh\u00f3m \u0111\u1ecba ch\u1ec9 (lobal, Link-local, Multicast, etc.)<\/td>\n<\/tr>\n<tr class=\"row-7\">\n\t<td class=\"column-1\">Kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch<\/td><td class=\"column-2\">Kh\u00f4ng ph\u00f9 h\u1ee3p v\u1edbi m\u1ea1ng di \u0111\u1ed9ng v\u00ec \u0111\u1ecba ch\u1ec9 c\u1ee7a n\u00f3 d\u00f9ng k\u00ed hi\u1ec7u d\u1ea5u th\u1eadp ph\u00e2n<\/td><td class=\"column-3\">T\u01b0\u01a1ng th\u00edch t\u1ed1t h\u01a1n v\u1edbi m\u1ea1ng di \u0111\u1ed9ng v\u00ec t\u00edch h\u1ee3p v\u1edbi nhi\u1ec1u t\u00ednh n\u0103ng<\/td>\n<\/tr>\n<tr class=\"row-8\">\n\t<td class=\"column-1\">\u00c1nh x\u1ea1 \u0111\u1ebfn \u0111\u1ecba ch\u1ec9 MAC<\/td><td class=\"column-2\">D\u00f9ng Address Resolution Protocol (ARP)<\/td><td class=\"column-3\">D\u00f9ng Neighbor Discovery Protocol (NDP)<\/td>\n<\/tr>\n<tr class=\"row-9\">\n\t<td class=\"column-1\">C\u1ea5u h\u00ecnh<\/td><td class=\"column-2\">Th\u01b0\u1eddng l\u00e0m th\u1ee7 c\u00f4ng ho\u1eb7c qua DHCP<\/td><td class=\"column-3\">T\u1ef1 \u0111\u1ed9ng c\u1ea5u h\u00ecnh b\u1eb1ng ICMP ho\u1eb7c DHCPv6<\/td>\n<\/tr>\n<tr class=\"row-10\">\n\t<td class=\"column-1\">DNS Record<\/td><td class=\"column-2\">\u0110\u1ecba ch\u1ec9 A<\/td><td class=\"column-3\">\u0110\u1ecba ch\u1ec9 AAA<\/td>\n<\/tr>\n<tr class=\"row-11\">\n\t<td class=\"column-1\">B\u1ea3o m\u1eadt<\/td><td class=\"column-2\">Kh\u00f4ng t\u00edch h\u1ee3p s\u1eb5n b\u1ea3o m\u1eadt trong IPv4, c\u1ea7n \u0111\u01b0\u1ee3c tri\u1ec3n khai ri\u00eang v\u1edbi IPsec<\/td><td class=\"column-3\">B\u1ea3o m\u1eadt t\u00edch h\u1ee3p s\u1eb5n v\u1edbi IPsec<\/td>\n<\/tr>\n<tr class=\"row-12\">\n\t<td class=\"column-1\">Chi\u1ec1u d\u00e0i Header<\/td><td class=\"column-2\">20<\/td><td class=\"column-3\">40<\/td>\n<\/tr>\n<tr class=\"row-13\">\n\t<td class=\"column-1\">Header field\t<\/td><td class=\"column-2\">12<\/td><td class=\"column-3\">8<\/td>\n<\/tr>\n<tr class=\"row-14\">\n\t<td class=\"column-1\">Hi\u1ec7u su\u1ea5t<\/td><td class=\"column-2\">Th\u1ea5p h\u01a1n IPv6<\/td><td class=\"column-3\">Hi\u1ec7u su\u1ea5t cao h\u01a1n nh\u1edd v\u00e0o vi\u1ec7c t\u1ed1i \u01b0u h\u00f3a thi\u1ebft k\u1ebf \u0111\u1ecba ch\u1ec9<\/td>\n<\/tr>\n<tr class=\"row-15\">\n\t<td class=\"column-1\">Checksum<\/td><td class=\"column-2\">C\u00f3<\/td><td class=\"column-3\">Kh\u00f4ng<\/td>\n<\/tr>\n<tr class=\"row-16\">\n\t<td class=\"column-1\">H\u1ed7 tr\u1ee3 <\/td><td class=\"column-2\">H\u1ed7 tr\u1ee3 SNMP<\/td><td class=\"column-3\">Kh\u00f4ng h\u1ed7 tr\u1ee3 SNMP<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n\n<p><a href=\"https:\/\/dncloud.net\/blog\/ipv6-la-gi\/\"><em><strong>\u0110\u1ecdc th\u00eam b\u00e0i vi\u1ebft v\u1ec1 IPv6 l\u00e0 g\u00ec? T\u1ea5t t\u1ea7n t\u1eadt ki\u1ebfn th\u1ee9c t\u1eeb [A-Z] v\u1ec1 \u0111\u1ecba ch\u1ec9 IPv6<\/strong><\/em><\/a><\/p>\n<h2>Nh\u1eefng \u0111i\u1ec1u c\u1ea7n l\u01b0u \u00fd v\u1ec1 IPv4 Address<\/h2>\n<p>Nh\u1eefng l\u01b0u \u00fd m\u00e0 b\u1ea1n n\u00ean bi\u1ebft v\u1ec1 IPv4 Address:<\/p>\n<p>T\u00f9y theo quy m\u00f4 v\u00e0 c\u00e1c lo\u1ea1i m\u1ea1ng \u0111\u1ec3 c\u1ea5u h\u00ecnh host, ng\u01b0\u1eddi ta th\u01b0\u1eddng s\u1eed d\u1ee5ng c\u00e1c l\u1edbp A, B v\u00e0 l\u1edbp C.<\/p>\n<p>\u0110\u1ec3 x\u00e1c \u0111\u1ecbnh IP c\u1ee7a c\u00e1c l\u1edbp b\u1ea1n c\u1ea7n nh\u00ecn v\u00e0o octet \u0111\u1ea7u ti\u00ean c\u1ee7a \u0111\u1ecba ch\u1ec9 IPv4, v\u00ed d\u1ee5 nh\u01b0:<\/p>\n<ul>\n<li>L\u1edbp A b\u1ea1n c\u1ea7n nh\u00ecn v\u00e0o octet \u0111\u1ea7u ti\u00ean n\u1eb1m trong kho\u1ea3ng t\u1eeb 1-126.<\/li>\n<li>L\u1edbp B b\u1ea1n c\u1ea7n nh\u00ecn v\u00e0o octet \u0111\u1ea7u ti\u00ean n\u1eb1m trong kho\u1ea3ng t\u1eeb 128-191.<\/li>\n<li>L\u1edbp C b\u1ea1n c\u1ea7n nh\u00ecn v\u00e0o octet \u0111\u1ea7u ti\u00ean n\u1eb1m trong kho\u1ea3ng t\u1eeb 192-223.<\/li>\n<\/ul>\n<p>S\u1eed d\u1ee5ng <strong>NAT <\/strong>\u0111\u01b0\u1ee3c vi\u1ebft t\u1eaft c\u1ee7a t\u1eeb <strong>Network Address Translation: <\/strong>NAT gi\u00fap t\u1ed1i \u01b0u h\u00f3a v\u00e0 m\u1edf r\u1ed9ng s\u1ed1 l\u01b0\u1ee3ng thi\u1ebft b\u1ecb k\u1ebft n\u1ed1i b\u1eb1ng c\u00e1ch chia s\u1ebb \u0111\u1ecba ch\u1ec9 c\u1ed9ng \u0111\u1ed3ng.<\/p>\n<p><a href=\"https:\/\/dncloud.net\/cloud-vps\/\"><em><strong>Tham kh\u1ea3o ngay d\u1ecbch v\u1ee5 cloud VPS t\u1ea1i DNCLOUD v\u1edbi IPv4 public<\/strong><\/em><\/a><\/p>\n<h2>L\u1eddi k\u1ebft<\/h2>\n<p>M\u1eb7c d\u00f9 IPv6 \u0111\u00e3 ra m\u1eaft v\u00e0 l\u1ee3i \u00edch c\u1ee7a n\u00f3 h\u01a1n r\u1ea5t nhi\u1ec1u so v\u1edbi IPv4 nh\u01b0ng IPv4 v\u1eabn gi\u1eef vai tr\u00f2 quan tr\u1ecdng trong h\u1ec7 th\u1ed1ng internet hi\u1ec7n \u0111\u1ea1i, n\u00f3 cung c\u1ea5p n\u1ec1n t\u1ea3ng \u0111\u1ec3 k\u1ebft n\u1ed1i v\u00e0 truy\u1ec1n t\u1ea3i d\u1eef li\u1ec7u gi\u1eefa c\u00e1c thi\u1ebft b\u1ecb. Qua b\u00e0i vi\u1ebft tr\u00ean m\u00e0 DNCLOUD \u0111\u00e3 chia s\u1ebb cho b\u1ea1n hi v\u1ecdng b\u1ea1n n\u1eafm v\u00e0 hi\u1ec3u r\u00f5 c\u0169ng nh\u01b0 bi\u1ebft c\u00e1ch \u1ee9ng d\u1ee5ng c\u1ee7a IPv4 l\u00e0 g\u00ec? N\u1ebfu c\u00f3 th\u1eafc m\u1eafc xin vui l\u00f2ng \u0111\u1ec3 l\u1ea1i b\u00ecnh lu\u1eadn ph\u00eda b\u00ean d\u01b0\u1edbi \u0111\u1ed9i ng\u0169 DNCLOUD s\u1ebd h\u1ed7 tr\u1ee3 b\u1ea1n s\u1edbm nh\u1ea5t.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Trong th\u1eddi \u0111\u1ea1i internet hi\u1ec7n nay, m\u1ed7i thi\u1ebft b\u1ecb hay k\u1ebft n\u1ed1i m\u1ea1ng \u0111\u1ec1u c\u1ea7n \u0111\u1ecba&hellip;<\/p>\n","protected":false},"author":1,"featured_media":3905,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"no","_lmt_disable":"","footnotes":""},"categories":[320,132],"tags":[274,325,275,322,326,321,323,324],"class_list":["post-3889","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dia-chi-ip","category-kien-thuc","tag-dia-chi-ip","tag-dia-chi-ipv4","tag-ipv4","tag-ipv4-address","tag-ipv4-address-class","tag-ipv4-la-gi","tag-so-sanh-ipv4-va-ipv6","tag-uu-diem-cua-ipv4"],"_links":{"self":[{"href":"https:\/\/dncloud.net\/blog\/wp-json\/wp\/v2\/posts\/3889","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dncloud.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dncloud.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dncloud.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dncloud.net\/blog\/wp-json\/wp\/v2\/comments?post=3889"}],"version-history":[{"count":0,"href":"https:\/\/dncloud.net\/blog\/wp-json\/wp\/v2\/posts\/3889\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dncloud.net\/blog\/wp-json\/wp\/v2\/media\/3905"}],"wp:attachment":[{"href":"https:\/\/dncloud.net\/blog\/wp-json\/wp\/v2\/media?parent=3889"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dncloud.net\/blog\/wp-json\/wp\/v2\/categories?post=3889"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dncloud.net\/blog\/wp-json\/wp\/v2\/tags?post=3889"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}