{"id":12377873,"date":"2026-03-19T14:02:45","date_gmt":"2026-03-19T06:02:45","guid":{"rendered":"https:\/\/www.likacloud.com\/knowledge\/%e6%b7%b1%e5%ba%a6%e8%a7%a3%e6%9e%90cdn%ef%bc%9a%e4%bb%8e%e5%8e%9f%e7%90%86%e5%88%b0%e5%ae%9e%e8%b7%b5%ef%bc%8c%e5%8a%a0%e9%80%9f%e4%bd%a0%e7%9a%84%e7%bd%91%e7%ab%99%e4%b8%8e%e5%ba%94%e7%94%a8\/"},"modified":"2026-03-19T14:07:56","modified_gmt":"2026-03-19T06:07:56","slug":"deep-cdn-guide-principles-practice-website-application-acceleration","status":"publish","type":"knowledge_post","link":"https:\/\/www.likacloud.com\/vi\/knowledge\/cdn\/deep-cdn-guide-principles-practice-website-application-acceleration\/","title":{"rendered":"Ph\u00e2n t\u00edch s\u00e2u v\u1ec1 CDN: T\u1eeb nguy\u00ean l\u00fd \u0111\u1ebfn th\u1ef1c ti\u1ec5n \u2013 H\u01b0\u1edbng d\u1eabn cu\u1ed1i c\u00f9ng \u0111\u1ec3 t\u0103ng t\u1ed1c trang web v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n"},"content":{"rendered":"

Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ed1t l\u00f5i c\u1ee7a CDN<\/h2>\n\n\n\n

CDN (Content Delivery Network) kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t d\u1ecbch v\u1ee5 hay thi\u1ebft b\u1ecb \u0111\u01a1n l\u1ebb, m\u00e0 l\u00e0 m\u1ed9t m\u1ea1ng l\u01b0\u1edbi th\u00f4ng minh \u0111\u01b0\u1ee3c t\u1ea1o th\u00e0nh t\u1eeb nhi\u1ec1u m\u00e1y ch\u1ee7 \u0111\u01b0\u1ee3c \u0111\u1eb7t t\u1ea1i c\u00e1c v\u1ecb tr\u00ed \u0111\u1ecba l\u00fd kh\u00e1c nhau. M\u1ee5c ti\u00eau ch\u00ednh c\u1ee7a CDN l\u00e0 l\u01b0u tr\u1eef c\u00e1c t\u00e0i nguy\u00ean t\u0129nh c\u1ee7a trang web ho\u1eb7c \u1ee9ng d\u1ee5ng (nh\u01b0 h\u00ecnh \u1ea3nh, CSS, JavaScript, t\u1ec7p video) c\u0169ng nh\u01b0 c\u00e1c n\u1ed9i dung \u0111\u1ed9ng tr\u00ean nh\u1eefng m\u00e1y ch\u1ee7 g\u1ea7n ng\u01b0\u1eddi d\u00f9ng h\u01a1n, nh\u1eb1m gi\u1ea3m b\u1edbt t\u1ea3i cho m\u00e1y ch\u1ee7 g\u1ed1c v\u00e0 gi\u1ea3m \u0111\u00e1ng k\u1ec3 th\u1eddi gian truy\u1ec1n t\u1ea3i n\u1ed9i dung.<\/p>\n\n\n\n

Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a n\u00f3 d\u1ef1a tr\u00ean m\u1ed9t h\u1ec7 th\u1ed1ng th\u00f4ng minh c\u00f3 kh\u1ea3 n\u0103ng \u201c\u0111\u1ecbnh tuy\u1ebfn l\u1ea1i y\u00eau c\u1ea7u\u201d (request redirection). Khi ng\u01b0\u1eddi d\u00f9ng c\u1ed1 g\u1eafng truy c\u1eadp m\u1ed9t trang web \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi d\u1ecbch v\u1ee5 CDN (Content Delivery Network), qu\u00e1 tr\u00ecnh truy c\u1eadp s\u1ebd thay \u0111\u1ed5i ho\u00e0n to\u00e0n. Ng\u01b0\u1eddi d\u00f9ng kh\u00f4ng c\u00f2n g\u1eedi y\u00eau c\u1ea7u tr\u1ef1c ti\u1ebfp \u0111\u1ebfn m\u00e1y ch\u1ee7 ch\u00ednh (server ngu\u1ed3n) c\u1ee7a trang web n\u1eefa. Thay v\u00e0o \u0111\u00f3, qu\u00e1 tr\u00ecnh gi\u1ea3i m\u00e3 \u0111\u1ecba ch\u1ec9 DNS (Domain Name System) s\u1ebd \u0111\u01b0\u1ee3c h\u1ec7 th\u1ed1ng \u0111i\u1ec1u ph\u1ed1i th\u00f4ng minh c\u1ee7a nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 CDN ti\u1ebfp qu\u1ea3n. H\u1ec7 th\u1ed1ng n\u00e0y s\u1ebd ph\u00e2n t\u00edch theo th\u1eddi gian th\u1ef1c v\u1ecb tr\u00ed \u0111\u1ecba l\u00fd c\u1ee7a ng\u01b0\u1eddi d\u00f9ng, t\u00ecnh tr\u1ea1ng m\u1ea1ng c\u1ee7a nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 m\u1ea1ng, c\u0169ng nh\u01b0 t\u1ea3i v\u00e0 tr\u1ea1ng th\u00e1i ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u00e1c n\u00fat l\u01b0u tr\u1eef (cache nodes), sau \u0111\u00f3 x\u00e1c \u0111\u1ecbnh n\u00fat truy c\u1eadp t\u1ed1i \u01b0u nh\u1ea5t \u0111\u1ed1i v\u1edbi ng\u01b0\u1eddi d\u00f9ng v\u00e0 tr\u1ea3 v\u1ec1 \u0111\u1ecba ch\u1ec9 IP t\u01b0\u01a1ng \u1ee9ng cho h\u1ecd.<\/p>\n\n\n\n

Sau \u0111\u00f3, tr\u00ecnh duy\u1ec7t c\u1ee7a ng\u01b0\u1eddi d\u00f9ng s\u1ebd g\u1eedi y\u00eau c\u1ea7u \u0111\u1ebfn n\u00fat c\u1ea1nh (edge node) \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh, n\u1eb1m g\u1ea7n nh\u1ea5t so v\u1edbi v\u1ecb tr\u00ed c\u1ee7a h\u1ecd. N\u1ebfu n\u00fat c\u1ea1nh c\u00f3 n\u1ed9i dung c\u1ea7n thi\u1ebft trong b\u1ed9 \u0111\u1ec7m v\u00e0 n\u1ed9i dung \u0111\u00f3 ch\u01b0a h\u1ebft h\u1ea1n, n\u00fat c\u1ea1nh s\u1ebd tr\u1ea3 v\u1ec1 n\u1ed9i dung \u0111\u00f3 cho ng\u01b0\u1eddi d\u00f9ng ngay l\u1eadp t\u1ee9c; qu\u00e1 tr\u00ecnh n\u00e0y th\u1eadm ch\u00ed kh\u00f4ng c\u1ea7n ph\u1ea3i truy c\u1eadp v\u00e0o m\u00e1y ch\u1ee7 g\u1ed1c (source server), do \u0111\u00f3 t\u1ed1c \u0111\u1ed9 r\u1ea5t nhanh. N\u1ebfu n\u00fat c\u1ea1nh kh\u00f4ng c\u00f3 n\u1ed9i dung c\u1ea7n thi\u1ebft trong b\u1ed9 \u0111\u1ec7m ho\u1eb7c n\u1ed9i dung \u0111\u00e3 h\u1ebft h\u1ea1n, n\u00f3 s\u1ebd truy c\u1eadp m\u00e1y ch\u1ee7 g\u1ed1c \u0111\u1ec3 l\u1ea5y n\u1ed9i dung m\u1edbi, \u0111\u1ed3ng th\u1eddi l\u01b0u tr\u1eef n\u1ed9i dung \u0111\u00f3 v\u00e0o b\u1ed9 \u0111\u1ec7m \u0111\u1ec3 s\u1eed d\u1ee5ng cho c\u00e1c y\u00eau c\u1ea7u sau n\u00e0y. Qu\u00e1 tr\u00ecnh n\u00e0y ho\u00e0n to\u00e0n trong su\u1ed1t \u0111\u1ed1i v\u1edbi ng\u01b0\u1eddi d\u00f9ng; h\u1ecd ch\u1ec9 c\u1ea3m nh\u1eadn \u0111\u01b0\u1ee3c r\u1eb1ng trang web \u0111\u01b0\u1ee3c t\u1ea3i r\u1ea5t nhanh.<\/p>\n\n\n\n

Vai tr\u00f2 quan tr\u1ecdng c\u1ee7a DNS trong CDN<\/h4>\n\n\n\n

DNS (Domain Name System) \u0111\u00f3ng vai tr\u00f2 nh\u01b0 \u201ctrung t\u00e2m \u0111i\u1ec1u ti\u1ebft giao th\u00f4ng\u201d trong ho\u1ea1t \u0111\u1ed9ng c\u1ee7a CDN (Content Delivery Network). Trong h\u1ec7 th\u1ed1ng DNS truy\u1ec1n th\u1ed1ng, t\u00ean mi\u1ec1n ch\u1ec9 \u0111\u01b0\u1ee3c gi\u1ea3i m\u00e3 th\u00e0nh m\u1ed9t \u0111\u1ecba ch\u1ec9 IP c\u1ed1 \u0111\u1ecbnh. Ng\u01b0\u1ee3c l\u1ea1i, CDN s\u1eed d\u1ee5ng c\u00f4ng ngh\u1ec7 DNS th\u00f4ng minh ho\u1eb7c c\u00e1c c\u00f4ng ngh\u1ec7 ph\u00e2n b\u1ed5 t\u1ea3i d\u1ef1a tr\u00ean DNS. Khi ng\u01b0\u1eddi d\u00f9ng th\u1ef1c hi\u1ec7n y\u00eau c\u1ea7u truy v\u1ea5n DNS, m\u00e1y ch\u1ee7 DNS c\u1ee7a CDN s\u1ebd kh\u00f4ng cung c\u1ea5p \u0111\u1ecba ch\u1ec9 IP c\u1ee7a m\u00e1y ch\u1ee7 ngu\u1ed3n, m\u00e0 thay v\u00e0o \u0111\u00f3 s\u1ebd tr\u1ea3 v\u1ec1 \u0111\u1ecba ch\u1ec9 IP c\u1ee7a n\u00fat c\u1ea1nh (edge node) ph\u00f9 h\u1ee3p nh\u1ea5t d\u1ef1a tr\u00ean m\u1ed9t b\u1ed9 quy t\u1eafc ph\u00e2n ph\u1ed1i ph\u1ee9c t\u1ea1p. Qu\u00e1 tr\u00ecnh n\u00e0y \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n trong v\u00f2ng v\u00e0i miligi\u00e2y, v\u00e0 \u0111\u00e2y ch\u00ednh l\u00e0 b\u01b0\u1edbc \u0111\u1ea7u ti\u00ean \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o vi\u1ec7c ph\u00e2n ph\u1ed1i n\u1ed9i dung m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c v\u00e0 nhanh ch\u00f3ng.<\/p>\n\n\n\n

Chi\u1ebfn l\u01b0\u1ee3c l\u01b0u tr\u1eef \u0111\u1ec7m (Cache Strategy) v\u00e0 Vi\u1ec7c C\u1eadp nh\u1eadt N\u1ed9i dung (Content Refresh)<\/h4>\n\n\n\n

Cache l\u00e0 n\u1ec1n t\u1ea3ng c\u01a1 b\u1ea3n cho vi\u1ec7c t\u0103ng t\u1ed1c hi\u1ec7u su\u1ea5t truy\u1ec1n t\u1ea3i n\u1ed9i dung b\u1eb1ng c\u00f4ng ngh\u1ec7 CDN (Content Delivery Network). Chi\u1ebfn l\u01b0\u1ee3c l\u01b0u tr\u1eef cache quy\u1ebft \u0111\u1ecbnh th\u1eddi gian m\u00e0 n\u1ed9i dung s\u1ebd \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef tr\u00ean c\u00e1c node (n\u00fat) \u1edf g\u1ea7n ng\u01b0\u1eddi d\u00f9ng. M\u1ed9t s\u1ed1 chi\u1ebfn l\u01b0\u1ee3c ph\u1ed5 bi\u1ebfn bao g\u1ed3m vi\u1ec7c thi\u1ebft l\u1eadp c\u00e1c th\u00f4ng tin header Cache-Control<\/code>(T\u1ed1i \u0111a th\u1eddi h\u1ea1n hi\u1ec7u l\u1ef1c) v\u00e0 Expires<\/code>(Th\u1eddi gian h\u1ebft h\u1ea1n tuy\u1ec7t \u0111\u1ed1i.) C\u00e1c k\u1ef9 s\u01b0 c\u00f3 th\u1ec3 thi\u1ebft l\u1eadp th\u1eddi gian l\u01b0u tr\u1eef \u0111\u1ec7m (cache) kh\u00e1c nhau cho c\u00e1c lo\u1ea1i t\u00e0i nguy\u00ean kh\u00e1c nhau; v\u00ed d\u1ee5, h\u00ecnh \u1ea3nh c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong v\u00e0i tu\u1ea7n, trong khi d\u1eef li\u1ec7u JSON th\u01b0\u1eddng xuy\u00ean \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt c\u00f3 th\u1ec3 ch\u1ec9 \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong v\u00e0i ph\u00fat.
\nKhi n\u1ed9i dung tr\u00ean m\u00e1y ch\u1ee7 ngu\u1ed3n \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt, CDN cung c\u1ea5p hai c\u01a1 ch\u1ebf l\u00e0m m\u1edbi ch\u00ednh: l\u00e0m m\u1edbi c\u01b0\u1ee1ng ch\u1ebf (Purge) v\u00e0 t\u1ea3i tr\u01b0\u1edbc (Prefetch). C\u01a1 ch\u1ebf l\u00e0m m\u1edbi c\u01b0\u1ee1ng ch\u1ebf s\u1ebd x\u00f3a ngay l\u1eadp t\u1ee9c d\u1eef li\u1ec7u \u0111\u00e3 \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong b\u1ed9 nh\u1edb \u0111\u1ec7m t\u1ea1i c\u00e1c node bi\u00ean (edge nodes), bu\u1ed9c ng\u01b0\u1eddi d\u00f9ng ti\u1ebfp theo ph\u1ea3i y\u00eau c\u1ea7u truy xu\u1ea5t n\u1ed9i dung t\u1eeb m\u00e1y ch\u1ee7 ngu\u1ed3n \u0111\u1ec3 l\u1ea5y d\u1eef li\u1ec7u m\u1edbi. C\u01a1 ch\u1ebf t\u1ea3i tr\u01b0\u1edbc th\u00ec s\u1ebd t\u1ef1 \u0111\u1ed9ng \u0111\u1ea9y n\u1ed9i dung \u0111\u00e3 \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt \u0111\u1ebfn c\u00e1c node bi\u00ean, \u0111\u1ea3m b\u1ea3o r\u1eb1ng ng\u01b0\u1eddi d\u00f9ng s\u1ebd nh\u1eadn \u0111\u01b0\u1ee3c d\u1eef li\u1ec7u m\u1edbi ngay t\u1eeb l\u1ea7n y\u00eau c\u1ea7u \u0111\u1ea7u ti\u00ean, t\u1eeb \u0111\u00f3 tr\u1ea3i nghi\u1ec7m t\u1ed1t nh\u1ea5t.<\/p>\n\n

\r\n\t\r\n\t\t\r\n\t\r\n\t
\r\n\t\t
\r\n\t\t\t\r\n\t\t\t
\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"\\nbunny.net\r\n\t\t\t\t\t\t\t\t\t\r\n\t\t\t<\/div>\r\n\t\t\t\r\n\t\t\t\r\n\t\t\t
\r\n\t\t\t\t
\r\n\t\t\t\t\t\\nbunny.net CDN<\/strong>\r\n\t\t\t\t\t\t\t\t\t<\/div>\r\n\t\t\t<\/div>\r\n\t\t<\/div>\r\n\t\t\t\tChi ph\u00ed ch\u1ec9 t\u1eeb 1 \u0111\u00f4 la m\u1ed7i th\u00e1ng, v\u1edbi m\u1ee9c ph\u00ed r\u00f5 r\u00e0ng v\u00e0 kh\u00f4ng c\u00f3 chi ph\u00ed \u1ea9n. C\u00e1c t\u00ednh n\u0103ng bao g\u1ed3m l\u01b0u tr\u1eef v\u0129nh vi\u1ec5n, gi\u00e1m s\u00e1t theo th\u1eddi gian th\u1ef1c, b\u1ea3o v\u1ec7 DDoS v\u00e0 ch\u1ee9ng ch\u1ec9 SSL mi\u1ec5n ph\u00ed. \u0110\u1eb7c bi\u1ec7t, n\u00f3 c\u00f2n \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a cho ph\u00e1t tr\u1ef1c tuy\u1ebfn video v\u00e0 cung c\u1ea5p m\u1ed9t m\u00f4 h\u00ecnh thanh to\u00e1n linh ho\u1ea1t theo m\u1ee9c s\u1eed d\u1ee5ng.<\/span>\r\n\t\t\t\t
\r\n\t\t\t\r\n\t\t\t\t\t\t\r\n\t\t\t \r\n\t\t\t
\r\n\t\t\t\t\t\t\t\t
Kh\u00f4ng c\u1ea7n th\u1ebb t\u00edn d\u1ee5ng, d\u00f9ng th\u1eed mi\u1ec5n ph\u00ed trong 14 ng\u00e0y<\/div>\r\n\t\t\t\t\t\t\t\t\t\t\t\tTruy c\u1eadp m\u1ea1ng l\u01b0\u1edbi ph\u00e2n ph\u1ed1i n\u1ed9i dung (CDN) c\u1ee7a bunny.net \u2192<\/a>\r\n\t\t\t\t\t\t\t<\/div> \r\n\t\t<\/div>\r\n\t<\/div>\r\n\t\t\r\n\t\r\n\t
\r\n\t\t
\r\n\t\t\t\r\n\t\t\t
\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"\u0110\u00e1m\r\n\t\t\t\t\t\t\t\t\t\r\n\t\t\t<\/div>\r\n\t\t\t\r\n\t\t\t\r\n\t\t\t
\r\n\t\t\t\t
\r\n\t\t\t\t\t\u0110\u00e1m m\u00e2y Cloudways Cloudflare Enterprise<\/strong>\r\n\t\t\t\t\t\t\t\t\t<\/div>\r\n\t\t\t<\/div>\r\n\t\t<\/div>\r\n\t\t\t\tG\u00f3i gi\u00e1 d\u1ecbch v\u1ee5 CDN\/WAF c\u1ea5p doanh nghi\u1ec7p c\u1ee7a Cloudflare c\u00f3 c\u00e1c m\u1ee9c ph\u00ed nh\u01b0 sau: t\u1ed1i \u0111a 5 t\u00ean mi\u1ec1n, m\u1ed7i t\u00ean mi\u1ec1n c\u00f3 gi\u00e1 4,99 USD\/th\u00e1ng, bao g\u1ed3m 100GB b\u0103ng th\u00f4ng, v\u00e0 ph\u1ea7n v\u01b0\u1ee3t qu\u00e1 s\u1ebd \u0111\u01b0\u1ee3c t\u00ednh ph\u00ed theo m\u1ee9c ph\u00ed 0,02 USD\/GB.<\/span>\r\n\t\t\t\t
\r\n\t\t\t\r\n\t\t\t\t\t\t\r\n\t\t\t \r\n\t\t\t
\r\n\t\t\t\t\t\t\t\t
M\u1ed7i t\u00ean mi\u1ec1n \u0111\u01b0\u1ee3c t\u1eb7ng 100GB l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp<\/div>\r\n\t\t\t\t\t\t\t\t\t\t\t\tTruy c\u1eadp Cloudways Cloudflare Enterprise \u2192<\/a>\r\n\t\t\t\t\t\t\t<\/div> \r\n\t\t<\/div>\r\n\t<\/div>\r\n\t\t\r\n<\/div>\r\n\r\n\r\n\n\n\n\n\n\n\n

T\u1ea1i sao c\u00e1c \u1ee9ng d\u1ee5ng hi\u1ec7n \u0111\u1ea1i kh\u00f4ng th\u1ec3 thi\u1ebfu CDN (Content Delivery Network \u2013 M\u1ea1ng Ph\u00e2n ph\u1ed1i N\u1ed9i dung)?<\/h2>\n\n\n\n

Trong m\u00f4i tr\u01b0\u1eddng internet ng\u00e0y nay, hi\u1ec7u su\u1ea5t c\u1ee7a c\u00e1c trang web v\u00e0 \u1ee9ng d\u1ee5ng c\u00f3 m\u1ed1i li\u00ean h\u1ec7 tr\u1ef1c ti\u1ebfp \u0111\u1ebfn tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng, t\u1ef7 l\u1ec7 chuy\u1ec3n \u0111\u1ed5i v\u00e0 th\u1eadm ch\u00ed th\u1ee9 h\u1ea1ng tr\u00ean c\u00e1c c\u00f4ng c\u1ee5 t\u00ecm ki\u1ebfm. CDN (Content Delivery Network) \u0111\u00e3 t\u1eeb m\u1ed9t c\u00f4ng ngh\u1ec7 t\u1ed1i \u01b0u h\u00f3a \u201ct\u0103ng th\u00eam gi\u00e1 tr\u1ecb\u201d tr\u1edf th\u00e0nh m\u1ed9t ph\u1ea7n c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng \u201ckh\u00f4ng th\u1ec3 thi\u1ebfu\u201d. Gi\u00e1 tr\u1ecb c\u1ee7a CDN th\u1ec3 hi\u1ec7n \u1edf nhi\u1ec1u kh\u00eda c\u1ea1nh, v\u01b0\u1ee3t xa vi\u1ec7c \u0111\u01a1n gi\u1ea3n l\u00e0 \u201ct\u0103ng t\u1ed1c \u0111\u1ed9 truy c\u1eadp\u201d.<\/p>\n\n\n\n

Tr\u01b0\u1edbc h\u1ebft, CDN (Content Delivery Network) l\u00e0 tuy\u1ebfn ph\u00f2ng th\u1ee7 \u0111\u1ea7u ti\u00ean \u0111\u1ec3 \u0111\u1ed1i ph\u00f3 v\u1edbi t\u00ecnh tr\u1ea1ng truy c\u1eadp \u0111\u1ed3ng th\u1eddi cao v\u00e0 l\u01b0u l\u01b0\u1ee3ng d\u1eef li\u1ec7u \u0111\u1ed9t ng\u1ed9t. D\u00f9 l\u00e0 c\u00e1c s\u1ef1 ki\u1ec7n gi\u1ea3m gi\u00e1 \u0111\u1eb7c bi\u1ec7t tr\u00ean n\u1ec1n t\u1ea3ng th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed, vi\u1ec7c ph\u00e1t h\u00e0nh tr\u00f2 ch\u01a1i m\u1edbi, hay c\u00e1c tin t\u1ee9c n\u00f3ng h\u1ed5i, t\u1ea5t c\u1ea3 \u0111\u1ec1u c\u00f3 th\u1ec3 g\u00e2y ra l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp v\u01b0\u1ee3t xa kh\u1ea3 n\u0103ng x\u1eed l\u00fd c\u1ee7a m\u00e1y ch\u1ee7 ngu\u1ed3n. C\u1ea5u tr\u00fac ph\u00e2n t\u00e1n c\u1ee7a CDN gi\u00fap ph\u00e2n t\u00e1n l\u01b0\u1ee3ng l\u1edbn y\u00eau c\u1ea7u truy c\u1eadp \u0111\u1ebfn h\u00e0ng tr\u0103m n\u00fat tr\u00ean to\u00e0n th\u1ebf gi\u1edbi; c\u00e1c n\u00fat \u1edf periphery (g\u1ea7n ng\u01b0\u1eddi d\u00f9ng) s\u1ebd tr\u1ef1c ti\u1ebfp x\u1eed l\u00fd ph\u1ea7n l\u1edbn c\u00e1c y\u00eau c\u1ea7u \u0111\u00f3, t\u1eeb \u0111\u00f3 b\u1ea3o v\u1ec7 m\u00e1y ch\u1ee7 ngu\u1ed3n kh\u1ecfi t\u00ecnh tr\u1ea1ng qu\u00e1 t\u1ea3i v\u00e0 s\u1eadp h\u1ec7 th\u1ed1ng, \u0111\u1ea3m b\u1ea3o t\u00ednh \u1ed5n \u0111\u1ecbnh v\u00e0 kh\u1ea3 d\u1ee5ng c\u1ee7a d\u1ecbch v\u1ee5.<\/p>\n\n\n\n

Th\u1ee9 hai, n\u00f3 \u0111\u00e3 gi\u00fap c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3 tr\u1ea3i nghi\u1ec7m truy c\u1eadp c\u1ee7a ng\u01b0\u1eddi d\u00f9ng tr\u00ean to\u00e0n th\u1ebf gi\u1edbi. Kho\u1ea3ng c\u00e1ch v\u1eadt l\u00fd l\u00e0 nguy\u00ean nh\u00e2n ch\u00ednh g\u00e2y ra \u0111\u1ed9 tr\u1ec5 m\u1ea1ng. B\u1eb1ng c\u00e1ch ph\u00e2n ph\u1ed1i n\u1ed9i dung \u0111\u1ebfn c\u00e1c node (\u0111i\u1ec3m truy c\u1eadp) \u1edf kh\u1eafp n\u01a1i tr\u00ean th\u1ebf gi\u1edbi, CDN \u0111\u1ea3m b\u1ea3o r\u1eb1ng d\u00f9 ng\u01b0\u1eddi d\u00f9ng \u1edf \u0111\u00e2u, h\u1ecd v\u1eabn c\u00f3 th\u1ec3 l\u1ea5y d\u1eef li\u1ec7u t\u1eeb c\u00e1c m\u00e1y ch\u1ee7 n\u1eb1m trong ph\u1ea1m vi v\u00e0i ch\u1ee5c kil\u00f4m\u00e9t, gi\u00fap r\u00fat ng\u1eafn th\u1eddi gian t\u1ea3i trang t\u1eeb v\u00e0i gi\u00e2y xu\u1ed1ng c\u00f2n v\u00e0i mili gi\u00e2y. Hi\u1ec7u qu\u1ea3 t\u0103ng t\u1ed1c n\u00e0y \u0111\u1eb7c bi\u1ec7t r\u00f5 r\u1ec7t \u0111\u1ed1i v\u1edbi c\u00e1c trang web hi\u1ec7n \u0111\u1ea1i ch\u1ee9a nhi\u1ec1u n\u1ed9i dung \u0111a ph\u01b0\u01a1ng ti\u1ec7n (rich media).<\/p>\n\n\n\n

Ngo\u00e0i ra, CDN c\u00f2n t\u00edch h\u1ee3p nhi\u1ec1u t\u00ednh n\u0103ng b\u1ea3o m\u1eadt quan tr\u1ecdng. Nhi\u1ec1u nh\u00e0 cung c\u1ea5p CDN cung c\u1ea5p d\u1ecbch v\u1ee5 gi\u1ea3m b\u1edbt c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng ki\u1ec3u DDoS (Distributed Denial of Service). Nh\u1edd v\u00e0o m\u1ea1ng l\u01b0\u1edbi ph\u00e2n t\u00e1n v\u00e0 c\u00e1c trung t\u00e2m l\u1ecdc l\u01b0u l\u01b0\u1ee3ng th\u00f4ng minh, CDN c\u00f3 th\u1ec3 nh\u1eadn di\u1ec7n v\u00e0 ch\u1eb7n c\u00e1c l\u01b0u l\u01b0\u1ee3ng \u0111\u1ed9c h\u1ea1i, ch\u1ec9 chuy\u1ec3n c\u00e1c y\u00eau c\u1ea7u h\u1ee3p l\u1ec7 c\u1ee7a ng\u01b0\u1eddi d\u00f9ng \u0111\u1ebfn m\u00e1y ch\u1ee7 ngu\u1ed3n. \u0110\u1ed3ng th\u1eddi, CDN c\u0169ng h\u1ed7 tr\u1ee3 c\u1ea5u h\u00ecnh ch\u1ee9ng ch\u1ec9 SSL\/TLS, \u0111\u1ea3m b\u1ea3o vi\u1ec7c m\u00e3 h\u00f3a to\u00e0n b\u1ed9 d\u1eef li\u1ec7u t\u1eeb ng\u01b0\u1eddi d\u00f9ng \u0111\u1ebfn c\u00e1c node bi\u00ean (edge nodes) v\u00e0 cu\u1ed1i c\u00f9ng l\u00e0 \u0111\u1ebfn m\u00e1y ch\u1ee7 ngu\u1ed3n, nh\u1eb1m b\u1ea3o v\u1ec7 an to\u00e0n qu\u00e1 tr\u00ecnh truy\u1ec1n d\u1eef li\u1ec7u.<\/p>\n\n\n\n

C\u00e1c nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 CDN (Content Delivery Network) ph\u1ed5 bi\u1ebfn v\u00e0 l\u1ef1a ch\u1ecdn c\u00f4ng ngh\u1ec7 ph\u00f9 h\u1ee3p<\/h2>\n\n\n\n

Vi\u1ec7c l\u1ef1a ch\u1ecdn nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 CDN (Content Delivery Network) ph\u00f9 h\u1ee3p l\u00e0 m\u1ed9t quy\u1ebft \u0111\u1ecbnh quan tr\u1ecdng trong thi\u1ebft k\u1ebf ki\u1ebfn tr\u00fac c\u00f4ng ngh\u1ec7. Tr\u00ean th\u1ecb tr\u01b0\u1eddng, c\u00f3 ba nh\u00f3m ch\u00ednh: c\u00e1c nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 \u0111\u00e1m m\u00e2y to\u00e0n c\u1ea7u, c\u00e1c nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 CDN chuy\u00ean nghi\u1ec7p, v\u00e0 c\u00e1c n\u1ec1n t\u1ea3ng t\u00ednh to\u00e1n t\u1ea1i r\u00eca (edge computing) m\u1edbi n\u1ed5i; m\u1ed7i nh\u00f3m \u0111\u1ec1<\/p>\n\n\n\n

C\u00e1c nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 \u0111\u00e1m m\u00e2y to\u00e0n c\u1ea7u nh\u01b0 Amazon CloudFront c\u1ee7a Amazon, Azure CDN c\u1ee7a Microsoft v\u00e0 Google Cloud CDN c\u00f3 \u01b0u th\u1ebf n\u1eb1m \u1edf vi\u1ec7c \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p s\u00e2u v\u00e0o h\u1ec7 sinh th\u00e1i \u0111\u00e1m m\u00e2y r\u1ed9ng l\u1edbn c\u1ee7a h\u1ecd (bao g\u1ed3m c\u00e1c d\u1ecbch v\u1ee5 nh\u01b0 t\u00ednh to\u00e1n, l\u01b0u tr\u1eef, c\u01a1 s\u1edf d\u1eef li\u1ec7u, v.v.). N\u1ebfu \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng ho\u00e0n to\u00e0n tr\u00ean m\u1ed9t n\u1ec1n t\u1ea3ng \u0111\u00e1m m\u00e2y c\u1ee5 th\u1ec3, vi\u1ec7c s\u1eed d\u1ee5ng d\u1ecbch v\u1ee5 CDN c\u1ee7a ch\u00ednh nh\u00e0 cung c\u1ea5p \u0111\u00e1m m\u00e2y \u0111\u00f3 th\u01b0\u1eddng mang l\u1ea1i nh\u1eefng l\u1ee3i \u00edch nh\u01b0 quy tr\u00ecnh c\u1ea5u h\u00ecnh \u0111\u01a1n gi\u1ea3n h\u01a1n, giao di\u1ec7n qu\u1ea3n l\u00fd th\u1ed1ng nh\u1ea5t v\u00e0 chi ph\u00ed truy\u1ec1n d\u1eef li\u1ec7u n\u1ed9i b\u1ed9 th\u1ea5p h\u01a1n (t\u1eeb m\u00e1y ch\u1ee7 ngu\u1ed3n \u0111\u1ebfn m\u00e1y ch\u1ee7 CDN).<\/p>\n\n\n\n

C\u00e1c nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 CDN chuy\u00ean nghi\u1ec7p nh\u01b0 Akamai, Cloudflare v\u00e0 Fastly n\u1ed5i ti\u1ebfng v\u1edbi hi\u1ec7u su\u1ea5t m\u1ea1ng v\u01b0\u1ee3t tr\u1ed9i, nhi\u1ec1u t\u00ednh n\u0103ng n\u00e2ng cao h\u1eefu \u00edch v\u00e0 kh\u1ea3 n\u0103ng b\u1ea3o m\u1eadt m\u1ea1nh m\u1ebd. C\u00e1c c\u00f4ng ty n\u00e0y th\u01b0\u1eddng s\u1edf h\u1eefu m\u1ea1ng l\u01b0\u1edbi ri\u00eang quy m\u00f4 l\u1edbn c\u00f9ng b\u1ed9 giao th\u1ee9c \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a m\u1ed9t c\u00e1ch tinh vi. V\u00ed d\u1ee5, Cloudflare \u0111\u01b0\u1ee3c \u01b0a chu\u1ed9ng nh\u1edd b\u1ed9 c\u00f4ng c\u1ee5 b\u1ea3o m\u1eadt m\u1ea1nh m\u1ebd v\u00e0 g\u00f3i d\u1ecbch v\u1ee5 d\u00e0nh cho ng\u01b0\u1eddi m\u1edbi s\u1eed d\u1ee5ng mi\u1ec5n ph\u00ed; trong khi Fastly \u0111\u01b0\u1ee3c c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n \u01b0a chu\u1ed9ng nh\u1edd kh\u1ea3 n\u0103ng x\u00f3a d\u1eef li\u1ec7u \u0111\u1ec7m (cache) theo th\u1eddi gian th\u1ef1c v\u00e0 s\u1ef1 h\u1ed7 tr\u1ee3 nhanh ch\u00f3ng \u0111\u1ed1i v\u1edbi c\u00e1c giao th\u1ee9c hi\u1ec7n \u0111\u1ea1i nh\u01b0 HTTP\/3.<\/p>\n\n\n\n

C\u00e1c n\u1ec1n t\u1ea3ng t\u00ednh to\u00e1n t\u1ea1i r\u00eca (edge computing) m\u1edbi n\u1ed5i \u0111\u00e3 m\u1edf r\u1ed9ng th\u00eam kh\u00e1i ni\u1ec7m CDN (Content Delivery Network). Ch\u00fang kh\u00f4ng ch\u1ec9 l\u01b0u tr\u1eef n\u1ed9i dung m\u00e0 c\u00f2n cho ph\u00e9p c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n tri\u1ec3n khai m\u1ed9t ph\u1ea7n logic \u1ee9ng d\u1ee5ng (d\u01b0\u1edbi d\u1ea1ng c\u00e1c h\u00e0m Serverless) \u0111\u1ec3 ch\u1ea1y tr\u1ef1c ti\u1ebfp tr\u00ean c\u00e1c node t\u1ea1i r\u00eca. \u0110i\u1ec1u n\u00e0y gi\u00fap th\u1ef1c hi\u1ec7n c\u00e1c thao t\u00e1c nh\u01b0 x\u00e1c th\u1ef1c ng\u01b0\u1eddi d\u00f9ng, ki\u1ec3m th\u1eed A\/B, t\u1ed5ng h\u1ee3p d\u1eef li\u1ec7u t\u1eeb c\u00e1c API\u2026 m\u1ed9t c\u00e1ch c\u00e1 nh\u00e2n h\u00f3a, ngay g\u1ea7n h\u01a1n v\u1edbi ng\u01b0\u1eddi d\u00f9ng, t\u1eeb \u0111\u00f3 gi\u1ea3m thi\u1ec3u \u0111\u00e1ng k\u1ec3 \u0111\u1ed9 tr\u1ec5 trong qu\u00e1 tr\u00ecnh truy c\u1eadp.<\/p>\n\n\n\n

C\u00e1c y\u1ebfu t\u1ed1 then ch\u1ed1t c\u1ea7n xem x\u00e9t khi l\u1ef1a ch\u1ecdn s\u1ea3n ph\u1ea9m<\/h4>\n\n\n\n

Khi l\u1ef1a ch\u1ecdn c\u00f4ng ngh\u1ec7, c\u1ea7n \u0111\u00e1nh gi\u00e1 \u0111\u1ed3ng th\u1eddi c\u00e1c y\u1ebfu t\u1ed1 sau: ph\u1ea1m vi ph\u1ee7 s\u00f3ng m\u1ea1ng v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng c\u00e1c node (\u0111\u1eb7c bi\u1ec7t l\u00e0 trong khu v\u1ef1c ng\u01b0\u1eddi d\u00f9ng m\u1ee5c ti\u00eau), t\u00ednh n\u0103ng c\u1ee7a c\u00f4ng ngh\u1ec7 (nh\u01b0 t\u1ed1i \u01b0u h\u00f3a h\u00ecnh \u1ea3nh, h\u1ed7 tr\u1ee3 xem video theo y\u00eau c\u1ea7u\/tr\u1ef1c ti\u1ebfp, quy t\u1eafc b\u1ea3o m\u1eadt cho \u1ee9ng d\u1ee5ng web), \u0111\u1ed9 d\u1ec5 s\u1eed d\u1ee5ng v\u00e0 m\u1ee9c \u0111\u1ed9 tr\u01b0\u1edfng th\u00e0nh c\u1ee7a API, m\u00f4 h\u00ecnh gi\u00e1 c\u1ea3 (t\u00ednh ph\u00ed theo l\u01b0u l\u01b0\u1ee3ng, s\u1ed1 l\u01b0\u1ee3ng y\u00eau c\u1ea7u ho\u1eb7c b\u0103ng th\u00f4ng), c\u0169ng nh\u01b0 m\u1ee9c \u0111\u1ed9 h\u1ed7 tr\u1ee3 k\u1ef9 thu\u1eadt v\u00e0 s\u1ef1 \u0111\u1ea7y \u0111\u1ee7 c\u1ee7a t\u00e0i li\u1ec7u h\u01b0\u1edbng d\u1eabn. Th\u00f4ng th\u01b0\u1eddng, vi\u1ec7c th\u1ef1c hi\u1ec7n c\u00e1c b\u00e0i ki\u1ec3m th\u1eed th\u1ef1c t\u1ebf (PoC \u2013 Proof of Concept) \u0111\u1ec3 \u0111o l\u01b0\u1eddng hi\u1ec7u su\u1ea5t th\u1ef1c t\u1ebf c\u1ee7a c\u00e1c nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 trong m\u00f4i tr\u01b0\u1eddng kinh doanh c\u1ee7a b\u1ea1n l\u00e0 c\u00e1ch hi\u1ec7u qu\u1ea3 nh\u1ea5t \u0111\u1ec3 \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh \u0111\u00fang \u0111\u1eafn.<\/p>\n\n\n\n

H\u01b0\u1edbng d\u1eabn th\u1ef1c h\u00e0nh: C\u1ea5u h\u00ecnh CDN cho trang web c\u1ee7a b\u1ea1n<\/h2>\n\n\n\n

Vi\u1ec7c t\u00edch h\u1ee3p CDN (Content Delivery Network) v\u00e0o trang web ho\u1eb7c \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n th\u01b0\u1eddng y\u00eau c\u1ea7u th\u1ef1c hi\u1ec7n m\u1ed9t lo\u1ea1t c\u00e1c b\u01b0\u1edbc chu\u1ea9n h\u00f3a. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 quy tr\u00ecnh th\u1ef1c h\u00e0nh chung gi\u00fap b\u1ea1n b\u1eaft \u0111\u1ea7u s\u1eed d\u1ee5ng d\u1ecbch v\u1ee5 CDN \u0111\u1ec3 t\u0103ng t\u1ed1c \u0111\u1ed9 truy\u1ec1n t\u1ea3i n\u1ed9i dung t\u1eeb \u0111\u1ea7u.<\/p>\n\n\n\n

B\u01b0\u1edbc \u0111\u1ea7u ti\u00ean l\u00e0 ch\u1ecdn v\u00e0 \u0111\u0103ng k\u00fd m\u1ed9t nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 CDN (Content Delivery Network). D\u1ef1a tr\u00ean ph\u00e2n t\u00edch \u1edf ch\u01b0\u01a1ng tr\u01b0\u1edbc, k\u1ebft h\u1ee3p v\u1edbi nhu c\u1ea7u kinh doanh, ng\u00e2n s\u00e1ch v\u00e0 c\u00f4ng ngh\u1ec7 m\u00e0 b\u1ea1n s\u1eed d\u1ee5ng, h\u00e3y \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh ph\u00f9 h\u1ee3p. Sau khi ho\u00e0n t\u1ea5t vi\u1ec7c \u0111\u0103ng k\u00fd, b\u1ea1n c\u1ea7n th\u00eam trang web c\u1ee7a m\u00ecnh (trang web ngu\u1ed3n) v\u00e0o h\u1ec7 th\u1ed1ng qu\u1ea3n tr\u1ecb c\u1ee7a nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 CDN. Qu\u00e1 tr\u00ecnh n\u00e0y th\u01b0\u1eddng y\u00eau c\u1ea7u b\u1ea1n ch\u1ec9 \u0111\u1ecbnh \u0111\u1ecba ch\u1ec9 IP th\u1ef1c t\u1ebf ho\u1eb7c t\u00ean mi\u1ec1n c\u1ee7a m\u00e1y ch\u1ee7 ngu\u1ed3n, v\u00e0 c\u00f3 th\u1ec3 c\u1ea7n c\u1ea5u h\u00ecnh c\u00e1c c\u1ed5ng v\u00e0 giao th\u1ee9c t\u00f9y ch\u1ec9nh.<\/p>\n\n\n\n

B\u01b0\u1edbc th\u1ee9 hai l\u00e0 c\u1ea5u h\u00ecnh DNS. \u0110\u00e2y l\u00e0 b\u01b0\u1edbc quan tr\u1ecdng nh\u1ea5t. B\u1ea1n c\u1ea7n \u0111\u1ecbnh tuy\u1ebfn c\u00e1c b\u1ea3n ghi DNS (th\u01b0\u1eddng l\u00e0 b\u1ea3n ghi CNAME) c\u1ee7a t\u00ean mi\u1ec1n c\u1ee7a m\u00ecnh sang t\u00ean mi\u1ec1n \u1ea3o m\u00e0 nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 CDN cung c\u1ea5p cho b\u1ea1n. V\u00ed d\u1ee5, h\u00e3y \u0111\u1ecbnh tuy\u1ebfn\u2026 www.yourdomain.com<\/code> CNAME (Canonical Name) record c\u1ee7a\u2026 tr\u1ecf \u0111\u1ebfn\u2026 yourdomain.cdnprovider.net<\/code>\u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 t\u1ea5t c\u1ea3 nh\u1eefng g\u00ec li\u00ean quan \u0111\u1ebfn\u2026 www.yourdomain.com<\/code> M\u1ecdi y\u00eau c\u1ea7u truy c\u1eadp s\u1ebd \u0111\u01b0\u1ee3c x\u1eed l\u00fd tr\u01b0\u1edbc b\u1edfi h\u1ec7 th\u1ed1ng DNS th\u00f4ng minh c\u1ee7a nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 CDN. Sau khi th\u1ef1c hi\u1ec7n thay \u0111\u1ed5i n\u00e0y, DNS s\u1ebd m\u1ea5t m\u1ed9t kho\u1ea3ng th\u1eddi gian nh\u1ea5t \u0111\u1ecbnh (th\u01b0\u1eddng t\u1eeb v\u00e0i ph\u00fat \u0111\u1ebfn v\u00e0i gi\u1edd) \u0111\u1ec3 c\u00f3 hi\u1ec7u l\u1ef1c.<\/p>\n\n\n\n

B\u01b0\u1edbc th\u1ee9 ba l\u00e0 t\u1ed1i \u01b0u h\u00f3a c\u00e1c quy t\u1eafc l\u01b0u tr\u1eef \u0111\u1ec7m (cache rules). H\u1ea7u h\u1ebft c\u00e1c nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 CDN (Content Delivery Network) \u0111\u1ec1u cung c\u1ea5p giao di\u1ec7n \u0111\u1ec3 c\u1ea5u h\u00ecnh c\u00e1c quy t\u1eafc l\u01b0u tr\u1eef \u0111\u1ec7m m\u1ed9t c\u00e1ch linh ho\u1ea1t. B\u1ea1n c\u1ea7n x\u00e2y d\u1ef1ng c\u00e1c chi\u1ebfn l\u01b0\u1ee3c ph\u00f9 h\u1ee3p d\u1ef1a tr\u00ean lo\u1ea1i t\u00e0i nguy *.jpg, *.png, *.css, *.js<\/code> \u0110\u1ed1i v\u1edbi c\u00e1c t\u00e0i nguy\u00ean t\u0129nh, h\u00e3y thi\u1ebft l\u1eadp th\u1eddi gian l\u01b0u tr\u1eef trong b\u1ed9 \u0111\u1ec7m d\u00e0i h\u01a1n (v\u00ed d\u1ee5: 30 ng\u00e0y); \u0111\u1ed1i v\u1edbi c\u00e1c trang HTML, h\u00e3y thi\u1ebft l\u1eadp th\u1eddi gian l\u01b0u tr\u1eef trong b\u1ed9 \u0111\u1ec7m ng\u1eafn h\u01a1n ho\u1eb7c k\u00edch ho\u1ea1t c\u00e1c quy t\u1eafc ph\u1ee9c t\u1ea1p nh\u01b0 \u201cb\u1ecf qua chu\u1ed7i truy v\u1ea5n\u201d; \u0111\u1ed1i v\u1edbi c\u00e1c trang \u0111\u1ed9ng kh\u00f4ng th\u1ec3 \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong b\u1ed9 \u0111\u1ec7m (v\u00ed d\u1ee5: trang c\u00e1 nh\u00e2n c\u1ee7a ng\u01b0\u1eddi d\u00f9ng), h\u00e3y c\u1ea5u h\u00ecnh ch\u00fang th\u00e0nh \u201ckh\u00f4ng l\u01b0u tr\u1eef\u201d ho\u1eb7c ch\u1ec9 l\u01b0u tr\u1eef trong th\u1eddi gian r\u1ea5t ng\u1eafn.<\/p>\n\n\n\n

B\u01b0\u1edbc th\u1ee9 t\u01b0 l\u00e0 ki\u1ec3m th\u1eed v\u00e0 x\u00e1c nh\u1eadn. Sau khi DNS ho\u1ea1t \u0111\u1ed9ng ho\u00e0n to\u00e0n, b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng nhi\u1ec1u ph\u01b0\u01a1ng ph\u00e1p kh\u00e1c nhau \u0111\u1ec3 x\u00e1c minh xem CDN c\u00f3 ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng hay kh\u00f4ng. H\u00e3y s\u1eed d\u1ee5ng c\u00e1c c\u00f4ng c\u1ee5 d\u00f2ng l\u1ec7nh nh\u01b0\u2026 curl -I<\/code> H\u00e3y ki\u1ec3m tra c\u00e1c ti\u00eau \u0111\u1ec1 HTTP \u0111\u01b0\u1ee3c tr\u1ea3 v\u1ec1 \u0111\u1ec3 xem li\u1ec7u ch\u00fang c\u00f3 ch\u1ee9a th\u00f4ng tin \u0111\u1eb7c tr\u01b0ng c\u1ee7a nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 CDN (nh\u01b0\u2026) hay kh\u00f4ng. Server: cloudflare<\/code>, X-Cache: HIT<\/code> S\u1eed d\u1ee5ng c\u00e1c c\u00f4ng c\u1ee5 \u0111o t\u1ed1c \u0111\u1ed9 tr\u1ef1c tuy\u1ebfn, truy c\u1eadp trang web c\u1ee7a b\u1ea1n t\u1eeb nhi\u1ec1u \u0111\u1ecba \u0111i\u1ec3m kh\u00e1c nhau tr\u00ean to\u00e0n th\u1ebf gi\u1edbi \u0111\u1ec3 so s\u00e1nh t\u1ed1c \u0111\u1ed9 t\u1ea3i trang v\u00e0 ngu\u1ed3n g\u1ed1c c\u00e1c t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng. \u0110\u1ed3ng th\u1eddi, h\u00e3y ki\u1ec3m tra xem c\u00e1c t\u00ednh n\u0103ng c\u1ee7a trang web c\u00f3 ho\u1ea1t \u0111\u1ed9ng \u0111\u1ea7y \u0111\u1ee7 hay kh\u00f4ng, \u0111\u1eb7c bi\u1ec7t l\u00e0 c\u00e1c ph\u1ea7n t\u01b0\u01a1ng t\u00e1c \u0111\u1ed9ng (dynamic interactions), v\u00e0 \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u1ea5u h\u00ecnh b\u1ed9 \u0111\u1ec7m (cache) kh\u00f4ng g<\/p>\n\n\n\n

C\u1ea5u h\u00ecnh b\u1ea3o m\u1eadt HTTPS<\/h4>\n\n\n\n

Trong m\u00f4i tr\u01b0\u1eddng Web hi\u1ec7n \u0111\u1ea1i, vi\u1ec7c k\u00edch ho\u1ea1t giao th\u1ee9c HTTPS l\u00e0 \u0111i\u1ec1u b\u1eaft bu\u1ed9c. C\u00e1c nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 CDN (Content Delivery Network) \u0111\u00e3 gi\u00fap qu\u00e1 tr\u00ecnh n\u00e0y tr\u1edf n\u00ean \u0111\u01a1n gi\u1ea3n h\u00f3a \u0111\u00e1ng k\u1ec3. B\u1ea1n c\u00f3 th\u1ec3 t\u1ea3i ch\u1ee9ng ch\u1ec9 SSL c\u1ee7a ri\u00eang m\u00ecnh l\u00ean n\u1ec1n t\u1ea3ng CDN, ho\u1eb7c s\u1eed d\u1ee5ng nh\u1eefng ch\u1ee9ng ch\u1ec9 mi\u1ec5n ph\u00ed \u0111\u01b0\u1ee3c cung c\u1ea5p b\u1edfi nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5, ho\u1eb7c c\u00e1c d\u1ecbch v\u1ee5 qu\u1ea3n l\u00fd ch\u1ee9ng ch\u1ec9 t\u1ef1 \u0111\u1ed9ng. Sau khi c\u1ea5u h\u00ecnh xong, CDN s\u1ebd ch\u1ecbu tr\u00e1ch nhi\u1ec7m th\u1ef1c hi\u1ec7n vi\u1ec7c m\u00e3 h\u00f3a d\u1eef li\u1ec7u b\u1eb1ng giao th\u1ee9c HTTPS khi ng\u01b0\u1eddi d\u00f9ng k\u1ebft n\u1ed1i v\u1edbi c\u00e1c node edge (c\u00e1c m\u00e1y ch\u1ee7 \u0111\u1eb7t \u1edf g\u1ea7n ng\u01b0\u1eddi d\u00f9ng). \u0110\u1ed1i v\u1edbi d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c truy\u1ec1n t\u1eeb c\u00e1c node edge v\u1ec1 m\u00e1y ch\u1ee7 ngu\u1ed3n c\u1ee7a b\u1ea1n, b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng giao th\u1ee9c HTTPS ho\u1eb7c HTTP, t\u00f9y theo nhu c\u1ea7u b\u1ea3o m\u1eadt. \u0110i\u1ec1u n\u00e0y kh\u00f4ng ch\u1ec9 gi\u00fap gi\u1ea3m b\u1edbt g\u00e1nh n\u1eb7ng t\u00ednh to\u00e1n li\u00ean quan \u0111\u1ebfn vi\u1ec7c m\u00e3 h\u00f3a\/d\u1ecbch m\u00e3 d\u1eef li\u1ec7u cho m\u00e1y ch\u1ee7 ngu\u1ed3n m\u00e0 c\u00f2n \u0111\u1ea3m b\u1ea3o an to\u00e0n cho to\u00e0n b\u1ed9 qu\u00e1 tr\u00ecnh truy\u1ec1n th\u00f4ng.<\/p>\n\n\n\n

T\u00f3m l\u1ea1i<\/h2>\n\n\n\n

CDN (Content Delivery Network) \u0111\u01b0\u1ee3c coi l\u00e0 \u201cm\u1ea1ng l\u01b0\u1edbi \u0111\u01b0\u1eddng cao t\u1ed1c\u201d cho n\u1ed9i dung tr\u00ean Internet. B\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c h\u1ec7 th\u1ed1ng l\u01b0u tr\u1eef d\u1eef li\u1ec7u ph\u00e2n t\u00e1n (distributed caching) v\u00e0 kh\u1ea3 n\u0103ng \u0111i\u1ec1u ph\u1ed1i th\u00f4ng minh (intelligent scheduling), CDN gi\u00fap gi\u1ea3i quy\u1ebft hi\u1ec7u qu\u1ea3 c\u00e1c v\u1ea5n \u0111\u1ec1 c\u1ed1t l\u00f5i nh\u01b0 \u0111\u1ed9 tr\u1ec5 k\u1ebft n\u1ed1i, t\u1ea3i qu\u00e1 m\u1ee9c c\u1ee7a m\u00e1y ch\u1ee7, v\u00e0 h\u1ea1n ch\u1ebf b\u0103ng th\u00f4ng. B\u1eb1ng c\u00e1ch \u0111\u01b0a n\u1ed9i dung \u0111\u1ebfn g\u1ea7n ng\u01b0\u1eddi d\u00f9ng h\u01a1n, CDN cho ph\u00e9p h\u1ecd truy c\u1eadp nhanh ch\u00f3ng c\u00e1c t\u00e0i nguy\u00ean c\u1ea7n thi\u1ebft, t\u1eeb \u0111\u00f3 kh\u00f4ng ch\u1ec9 c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3 tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng m\u00e0 c\u00f2n \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh v\u00e0 b\u1ea3o m\u1eadt cho c\u00e1c trang web. T\u1eeb vi\u1ec7c hi\u1ec3u r\u00f5 c\u00e1c nguy\u00ean l\u00fd c\u01a1 b\u1ea3n c\u1ee7a CDN d\u1ef1a tr\u00ean DNS (Domain Name System) v\u00e0 h\u1ec7 th\u1ed1ng l\u01b0u tr\u1eef \u0111\u1ec7m, \u0111\u1ebfn nh\u1eadn th\u1ee9c v\u1ec1 gi\u00e1 tr\u1ecb \u0111a d\u1ea1ng c\u1ee7a n\u00f3 trong c\u00e1c \u1ee9ng d\u1ee5ng hi\u1ec7n \u0111\u1ea1i, cho \u0111\u1ebfn vi\u1ec7c l\u1ef1a ch\u1ecdn nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 ph\u00f9 h\u1ee3p v\u00e0 th\u1ef1c hi\u1ec7n c\u00e1c thi\u1ebft l\u1eadp c\u1ea7n thi\u1ebft, vi\u1ec7c n\u1eafm v\u1eefng c\u00f4ng ngh\u1ec7 CDN \u0111\u00e3 tr\u1edf th\u00e0nh k\u1ef9 n\u0103ng thi\u1ebft y\u1ebfu \u0111\u1ed1i v\u1edbi c\u00e1c k\u1ef9 s\u01b0 ph\u00e1t tri\u1ec3n \u1ee9ng d\u1ee5ng (front-end) v\u00e0 qu\u1ea3n tr\u1ecb h\u1ec7 th\u1ed1ng (ops engineers). V\u1edbi s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a c\u00e1c c\u00f4ng ngh\u1ec7 m\u1edbi nh\u01b0 \u0111i\u1ec7n to\u00e1n bi\u00ean (edge computing), CDN \u0111ang d\u1ea7n chuy\u1ec3n m\u00ecnh t\u1eeb m\u1ed9t h\u1ec7 th\u1ed1ng ph\u00e2n ph\u1ed1i n\u1ed9i dung \u0111\u01a1n thu\u1ea7n th\u00e0nh m\u1ed9t n\u1ec1n t\u1ea3ng d\u1ecbch v\u1ee5 bi\u00ean th\u00f4ng minh v\u00e0 c\u00f3 th\u1ec3 l\u1eadp tr\u00ecnh \u0111\u01b0\u1ee3c. Trong t\u01b0\u01a1ng lai, CDN s\u1ebd ti\u1ebfp t\u1ee5c \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t trong vi\u1ec7c x\u00e2y d\u1ef1ng n\u1ec1n t\u1ea3ng cho c\u00e1c doanh nghi\u1ec7p s\u1ed1 h\u00f3a.<\/p>\n\n\n\n

FAQ \u5e38\u89c1\u95ee\u9898<\/h2>\n\n\n\n

Sau khi s\u1eed d\u1ee5ng CDN, t\u1ed1c \u0111\u1ed9 t\u1ea3i trang c\u1ee7a trang web c\u1ee7a t\u00f4i ch\u1eafc ch\u1eafn s\u1ebd t\u0103ng l\u00ean kh\u00f4ng?<\/h3>\n\n\n\n

Trong h\u1ea7u h\u1ebft c\u00e1c tr\u01b0\u1eddng h\u1ee3p, \u0111\u1eb7c bi\u1ec7t l\u00e0 \u0111\u1ed1i v\u1edbi nh\u1eefng trang web c\u00f3 nhi\u1ec1u t\u00e0i nguy\u00ean t\u0129nh v\u00e0 ng\u01b0\u1eddi d\u00f9ng ph\u00e2n b\u1ed1 r\u1ed9ng r\u00e3i theo \u0111\u1ecba l\u00fd, CDN (Content Delivery Network) s\u1ebd gi\u00fap c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3 t\u1ed1c \u0111\u1ed9 t\u1ea3i trang. L\u1ea7n truy c\u1eadp \u0111\u1ea7u ti\u00ean c\u1ee7a ng\u01b0\u1eddi d\u00f9ng (khi b\u1ed9 \u0111\u1ec7m ch\u01b0a \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt \u2013 tr\u1ea1ng th\u00e1i \u201cl\u1ea1nh\u201d) c\u00f3 th\u1ec3 v\u1eabn ph\u1ea3i truy c\u1eadp tr\u1ef1c ti\u1ebfp t\u1eeb m\u00e1y ch\u1ee7 ngu\u1ed3n, do \u0111\u00f3 m\u1ee9c \u0111\u1ed9 c\u1ea3i thi\u1ec7n t\u1ed1c \u0111\u1ed9 s\u1ebd h\u1ea1n ch\u1ebf; tuy nhi\u00ean, c\u00e1c l\u1ea7n truy c\u1eadp ti\u1ebfp theo (khi b\u1ed9 \u0111\u1ec7m \u0111\u00e3 \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt \u2013 tr\u1ea1ng th\u00e1i \u201cn\u00f3ng\u201d) s\u1ebd mang l\u1ea1i tr\u1ea3i nghi\u1ec7m t\u1ea3i trang c\u1ef1c k\u1ef3 nhanh ch\u00f3ng. M\u1ee9c \u0111\u1ed9 c\u1ea3i thi\u1ec7n t\u1ed1c \u0111\u1ed9 ph\u1ee5 thu\u1ed9c v\u00e0o nhi\u1ec1u y\u1ebfu t\u1ed1 nh<\/p>\n\n\n\n

CDN c\u00f3 th\u1ec3 t\u0103ng t\u1ed1c n\u1ed9i dung \u0111\u1ed9ng kh\u00f4ng?<\/h3>\n\n\n\n

\u0110\u01b0\u1ee3c, nh\u01b0ng nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a n\u00f3 kh\u00e1c v\u1edbi c\u00e1ch t\u0103ng t\u1ed1c c\u00e1c n\u1ed9i dung t\u0129nh. C\u00e1c h\u1ec7 th\u1ed1ng CDN truy\u1ec1n th\u1ed1ng ch\u1ee7 y\u1ebfu l\u01b0u tr\u1eef c\u00e1c t\u1ec7p tin t\u0129nh, trong khi c\u00e1c CDN hi\u1ec7n \u0111\u1ea1i s\u1eed d\u1ee5ng c\u00e1c k\u1ef9 thu\u1eadt t\u1ed1i \u01b0u h\u00f3a \u0111\u01b0\u1eddng truy\u1ec1n m\u1ea1ng \u0111\u1ec3 t\u0103ng t\u1ed1c c\u00e1c n\u1ed9i dung \u0111\u1ed9ng. V\u00ed d\u1ee5, th\u00f4ng qua c\u00e1c c\u00f4ng ngh\u1ec7 l\u1ef1a ch\u1ecdn \u0111\u01b0\u1eddng truy\u1ec1n th\u00f4ng minh, ch\u00fang s\u1ebd ch\u1ecdn con \u0111\u01b0\u1eddng TCP\/IP c\u00f3 ch\u1ea5t l\u01b0\u1ee3ng m\u1ea1ng t\u1ed1t nh\u1ea5t v\u00e0 th\u1eddi gian tr\u1ec5 th\u1ea5p nh\u1ea5t gi\u1eefa ng\u01b0\u1eddi d\u00f9ng v\u00e0 m\u00e1y ch\u1ee7 ngu\u1ed3n, nh\u1eb1m gi\u1ea3m thi\u1ec3u \u0111\u1ed9 tr\u1ec5 v\u00e0 t\u1ef7 l\u1ec7 m\u1ea5t g\u00f3i d\u1eef li\u1ec7u trong qu\u00e1 tr\u00ecnh truy\u1ec1n t\u1ea3i, t\u1eeb \u0111\u00f3 t\u0103ng t\u1ed1c hi\u1ec7u su\u1ea5t truy c\u1eadp c\u00e1c n\u1ed9i dung \u0111\u1ed9ng.<\/p>\n\n\n\n

CDN \u0111\u01b0\u1ee3c t\u00ednh ph\u00ed nh\u01b0 th\u1ebf n\u00e0o?<\/h3>\n\n\n\n

C\u00e1c m\u00f4 h\u00ecnh t\u00ednh ph\u00ed ph\u1ed5 bi\u1ebfn c\u1ee7a CDN th\u01b0\u1eddng d\u1ef1a tr\u00ean l\u01b0\u1ee3ng d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c truy\u1ec1n xu\u1ed1ng (t\u1ee9c l\u00e0 t\u1ed5ng l\u01b0\u1ee3ng d\u1eef li\u1ec7u t\u1eeb c\u00e1c n\u00fat CDN \u0111\u1ebfn ng\u01b0\u1eddi d\u00f9ng), \u0111\u01b0\u1ee3c \u0111o b\u1eb1ng \u0111\u01a1n v\u1ecb GB (Gigabyte) ho\u1eb7c TB (Terabyte). Ngo\u00e0i ra, s\u1ed1 l\u01b0\u1ee3ng y\u00eau c\u1ea7u HTTP\/HTTPS c\u0169ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0m ti\u00eau ch\u00ed \u0111\u1ec3 t\u00ednh ph\u00ed. M\u1ed9t s\u1ed1 nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 c\u00f2n cung c\u1ea5p d\u1ecbch v\u1ee5 t\u00ednh ph\u00ed theo m\u1ee9c \u0111\u1ed9 s\u1eed d\u1ee5ng b\u0103ng th\u00f4ng t\u1ed1i \u0111a ho\u1eb7c k\u1ebft h\u1ee3p nhi\u1ec1u ti\u00eau ch\u00ed kh\u00e1c nhau. Chi ti\u1ebft v\u1ec1 c\u00e1ch t\u00ednh ph\u00ed c\u00f3 th\u1ec3 kh\u00e1c nhau t\u00f9y theo nh\u00e0 cung c\u1ea5p v\u00e0 g\u00f3i d\u1ecbch v\u1ee5, v\u00ec v\u1eady b\u1ea1n c\u1ea7n \u0111\u1ecdc k\u1ef9 c\u00e1c t\u00e0i li\u1ec7u li\u00ean quan.<\/p>\n\n\n\n

Sau khi c\u1ea5u h\u00ecnh CDN, \u0111\u1ecba ch\u1ec9 IP c\u1ee7a m\u00e1y ch\u1ee7 ngu\u1ed3n (source server) c\u00f3 b\u1ecb ti\u1ebft l\u1ed9 kh\u00f4ng?<\/h3>\n\n\n\n

N\u1ebfu \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh \u0111\u00fang c\u00e1ch, \u0111\u1ecba ch\u1ec9 IP c\u1ee7a m\u00e1y ch\u1ee7 ngu\u1ed3n c\u1ee7a b\u1ea1n s\u1ebd \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 t\u1ed1t. \u0110i\u1ec1u quan tr\u1ecdng l\u00e0 b\u1ea1n ch\u1ec9 n\u00ean cho ph\u00e9p c\u00e1c \u0111\u1ecba ch\u1ec9 IP thu\u1ed9c nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 CDN m\u00e0 b\u1ea1n \u0111ang s\u1eed d\u1ee5ng truy c\u1eadp v\u00e0o m\u00e1y ch\u1ee7 ngu\u1ed3n (b\u1eb1ng c\u00e1ch thi\u1ebft l\u1eadp danh s\u00e1ch tr\u1eafng tr\u00ean t\u01b0\u1eddng l\u1eeda ho\u1eb7c nh\u00f3m b\u1ea3o m\u1eadt c\u1ee7a m\u00e1y ch\u1ee7), trong khi t\u1eeb ch\u1ed1i m\u1ecdi truy c\u1eadp tr\u1ef1c ti\u1ebfp t\u1eeb c\u00e1c \u0111\u1ecba ch\u1ec9 IP c\u00f4ng c\u1ed9ng kh\u00e1c. Nh\u1edd \u0111\u00f3, ng\u01b0\u1eddi d\u00f9ng v\u00e0 nh\u1eefng k\u1ebb t\u1ea5n c\u00f4ng ti\u1ec1m \u1ea9n ch\u1ec9 c\u00f3 th\u1ec3 ti\u1ebfp c\u1eadn \u0111\u01b0\u1ee3c \u0111\u1ecba ch\u1ec9 IP c\u1ee7a c\u00e1c n\u00fat CDN, ch\u1ee9 kh\u00f4ng th\u1ec3 bi\u1ebft \u0111\u01b0\u1ee3c \u0111\u1ecba ch\u1ec9 IP th\u1ef1c s\u1ef1 c\u1ee7a m\u00e1y ch\u1ee7 ngu\u1ed3n.<\/p>","protected":false},"excerpt":{"rendered":"

B\u00e0i vi\u1ebft n\u00e0y tr\u00ecnh b\u00e0y m\u1ed9t c\u00e1ch h\u1ec7 th\u1ed1ng nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ed1t l\u00f5i c\u1ee7a CDN (Content Delivery Network), bao g\u1ed3m c\u00e1ch CDN s\u1eed d\u1ee5ng h\u1ec7 th\u1ed1ng DNS th\u00f4ng minh \u0111\u1ec3 \u0111\u1ecbnh tuy\u1ebfn y\u00eau c\u1ea7u c\u1ee7a ng\u01b0\u1eddi d\u00f9ng \u0111\u1ebfn n\u00fat c\u1ea1nh (edge node) g\u1ea7n nh\u1ea5t, c\u01a1 ch\u1ebf l\u01b0u tr\u1eef d\u1eef li\u1ec7u trong b\u1ed9 nh\u1edb \u0111\u1ec7m (cache) v\u00e0 truy xu\u1ea5t d\u1eef li\u1ec7u t\u1eeb ngu\u1ed3n g\u1ed1c (origin server). B\u00e0i vi\u1ebft c\u0169ng ph\u00e2n t\u00edch gi\u00e1 tr\u1ecb quan tr\u1ecdng c\u1ee7a CDN trong vi\u1ec7c n\u00e2ng cao t\u1ed1c \u0111\u1ed9 truy c\u1eadp, x\u1eed l\u00fd l\u01b0\u1ee3ng l\u1edbn y\u00eau c\u1ea7u \u0111\u1ed3ng th\u1eddi (high concurrency), v\u00e0 t\u0103ng c\u01b0\u1eddng t\u00ednh b\u1ea3o m\u1eadt cho c\u00e1c trang web v\u00e0 \u1ee9<\/p>","protected":false},"author":7,"featured_media":0,"template":"","meta":{"_acf_changed":false,"footnotes":""},"tags":[],"knowledge_category":[278],"class_list":["post-12377873","knowledge_post","type-knowledge_post","status-publish","hentry","knowledge_category-cdn"],"acf":{"site_seo_keywords":"CDN,\u5185\u5bb9\u5206\u53d1\u7f51\u7edc,\u7f51\u7ad9\u52a0\u901f,DNS\u89e3\u6790,\u7f13\u5b58\u7b56\u7565,\u8fb9\u7f18\u8282\u70b9,CDN\u5de5\u4f5c\u539f\u7406,CDN\u5b9e\u8df5\u6307\u5357"},"_links":{"self":[{"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/knowledge_posts\/12377873","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/knowledge_posts"}],"about":[{"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/types\/knowledge_post"}],"author":[{"embeddable":true,"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/users\/7"}],"version-history":[{"count":0,"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/knowledge_posts\/12377873\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/media?parent=12377873"}],"wp:term":[{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/tags?post=12377873"},{"taxonomy":"knowledge_category","embeddable":true,"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/knowledge_category?post=12377873"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}