{"id":12368925,"date":"2026-03-14T19:16:34","date_gmt":"2026-03-14T11:16:34","guid":{"rendered":"https:\/\/www.likacloud.com\/knowledge\/cdn-%e6%8a%80%e6%9c%af%e5%8e%9f%e7%90%86%e4%b8%8e%e9%80%89%e5%9e%8b%e6%8c%87%e5%8d%97%ef%bc%9a%e5%a6%82%e4%bd%95%e4%b8%ba%e4%bd%a0%e7%9a%84%e7%bd%91%e7%ab%99%e5%8a%a0%e9%80%9f%e5%92%8c%e8%b5%8b\/"},"modified":"2026-03-14T19:21:28","modified_gmt":"2026-03-14T11:21:28","slug":"cdn-technology-principles-and-selection-guide-accelerate-website","status":"publish","type":"knowledge_post","link":"https:\/\/www.likacloud.com\/vi\/knowledge\/cdn\/cdn-technology-principles-and-selection-guide-accelerate-website\/","title":{"rendered":"Nguy\u00ean l\u00fd v\u00e0 H\u01b0\u1edbng d\u1eabn L\u1ef1a ch\u1ecdn C\u00f4ng ngh\u1ec7 CDN: C\u00e1ch T\u0103ng t\u1ed1c v\u00e0 Trao quy\u1ec1n cho Website c\u1ee7a B\u1ea1n"},"content":{"rendered":"

Trong b\u1ed1i c\u1ea3nh l\u01b0u l\u01b0\u1ee3ng internet to\u00e0n c\u1ea7u kh\u00f4ng ng\u1eebng t\u0103ng tr\u01b0\u1edfng, t\u1ed1c \u0111\u1ed9 t\u1ea3i trang v\u00e0 kh\u1ea3 n\u0103ng s\u1eb5n c\u00f3 (availability) c\u1ee7a c\u00e1c trang web \u0111\u00e3 tr\u1edf th\u00e0nh nh\u1eefng y\u1ebfu t\u1ed1 then ch\u1ed1t quy\u1ebft \u0111\u1ecbnh tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng c\u0169ng nh\u01b0 s\u1ef1 th\u00e0nh b\u1ea1i c\u1ee7a doanh nghi\u1ec7p. \u0110\u1ed1i m\u1eb7t v\u1edbi t\u00ecnh tr\u1ea1ng truy c\u1eadp \u0111\u1ed3ng th\u1eddi l\u1edbn v\u00e0 s\u1ef1 ch\u1eadm tr\u1ec5 do kho\u1ea3ng c\u00e1ch \u0111\u1ecba l\u00fd, ph\u01b0\u01a1ng th\u1ee9c ph\u00e2n ph\u1ed1i n\u1ed9i dung t\u0129nh truy\u1ec1n th\u1ed1ng kh\u00f4ng c\u00f2n \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c n\u1eefa. M\u1ea1ng l\u01b0\u1edbi ph\u00e2n ph\u1ed1i n\u1ed9i dung (Content Delivery Network \u2013 CDN) ch\u00ednh l\u00e0 gi\u1ea3i ph\u00e1p \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n trong b\u1ed1i c\u1ea3nh n\u00e0y. B\u1eb1ng c\u00e1ch l\u01b0u tr\u1eef n\u1ed9i dung trang web v\u00e0o c\u00e1c m\u00e1y ch\u1ee7 \u1edf c\u00e1c \u0111i\u1ec3m g\u1ea7n ng\u01b0\u1eddi d\u00f9ng tr\u00ean to\u00e0n th\u1ebf gi\u1edbi, CDN gi\u00fap h\u1ecd nh\u1eadn \u0111\u01b0\u1ee3c d\u1eef li\u1ec7u t\u1eeb n\u00fat g\u1ea7n nh\u1ea5t v\u1ec1 m\u1eb7t \u0111\u1ecba l\u00fd, t\u1eeb \u0111\u00f3 \u0111\u00e1ng k\u1ec3 c\u1ea3i thi\u1ec7n t\u1ed1c \u0111\u1ed9 truy c\u1eadp, gi\u1ea3m b\u1edbt \u00e1p l\u1ef1c l\u00ean m\u00e1y ch\u1ee7 ngu\u1ed3n v\u00e0 n\u00e2ng cao m\u1ee9c \u0111\u1ed9 b\u1ea3o m\u1eadt. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd ph\u00e2n t\u00edch chi ti\u1ebft nguy\u00ean l\u00fd k\u1ef9 thu\u1eadt c\u1ee7a CDN v\u00e0 cung c\u1ea5p m\u1ed9t h\u01b0\u1edbng d\u1eabn to\u00e0n di\u1ec7n v\u1ec1 vi\u1ec7c l\u1ef1a ch\u1ecdn v\u00e0 tri\u1ec3n khai CDN, nh\u1eb1m h\u1ed7 tr\u1ee3 b\u1ea1n t\u0103ng t\u1ed1c \u0111\u1ed9 trang web m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3.<\/p>\n\n\n\n

Nguy\u00ean l\u00fd c\u1ed1t l\u00f5i c\u1ee7a c\u00f4ng ngh\u1ec7 CDN (Content Delivery Network)<\/h2>\n\n\n\n

CDN (Content Delivery Network) kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t c\u00f4ng ngh\u1ec7 \u0111\u01a1n l\u1ebb, m\u00e0 l\u00e0 m\u1ed9t h\u1ec7 th\u1ed1ng ph\u1ee9c t\u1ea1p \u0111\u01b0\u1ee3c t\u1ea1o th\u00e0nh t\u1eeb nhi\u1ec1u th\u00e0nh ph\u1ea7n k\u1ef9 thu\u1eadt ch\u00ednh ho\u1ea1t \u0111\u1ed9ng ph\u1ed1i h\u1ee3p v\u1edbi nhau. M\u1ee5c ti\u00eau ch\u00ednh c\u1ee7a n\u00f3 l\u00e0 \u0111\u01b0a n\u1ed9i dung \u0111\u1ebfn g\u1ea7n ng\u01b0\u1eddi d\u00f9ng m\u1ed9t c\u00e1ch th\u00f4ng minh h\u01a1n. C\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng c\u1ee7a CDN c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u00f3m t\u1eaft qua hai kh\u00eda c\u1ea1nh ch\u00ednh: \u201cl\u01b0u tr\u1eef \u0111\u1ec7m\u201d (caching) v\u00e0 \u201cs\u1eafp x\u1ebfp ph\u00e2n ph\u1ed1i n<\/p>\n\n\n\n

C\u01a1 ch\u1ebf b\u1ed9 nh\u1edb \u0111\u1ec7m v\u00e0 ph\u00e2n ph\u1ed1i n\u1ed9i dung<\/h3>\n\n\n\n

B\u1ed9 nh\u1edb \u0111\u1ec7m (cache) l\u00e0 n\u1ec1n t\u1ea3ng c\u01a1 b\u1ea3n c\u1ee7a CDN (Content Delivery Network). Khi ng\u01b0\u1eddi d\u00f9ng y\u00eau c\u1ea7u m\u1ed9t t\u00e0i nguy\u00ean l\u1ea7n \u0111\u1ea7u ti\u00ean (ch\u1eb3ng h\u1ea1n nh\u01b0 h\u00ecnh \u1ea3nh, t\u1ec7p CSS, t\u1ec7p JavaScript ho\u1eb7c video), y\u00eau c\u1ea7u \u0111\u00f3 s\u1ebd \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ebfn m\u1ea1ng CDN. N\u1ebfu n\u00fat c\u1ea1nh (edge node) c\u1ee7a CDN kh\u00f4ng c\u00f3 b\u1ea3n sao c\u1ee7a t\u00e0i nguy\u00ean \u0111\u00f3 (t\u1ee9c l\u00e0 b\u1ed9 nh\u1edb \u0111\u1ec7m kh\u00f4ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng), n\u00fat \u0111\u00f3 s\u1ebd truy c\u1eadp tr\u1ef1c ti\u1ebfp v\u00e0o m\u00e1y ch\u1ee7 g\u1ed1c (origin server) \u0111\u1ec3 l\u1ea5y t\u00e0i nguy\u00ean v\u00e0 l\u01b0u n\u00f3 v\u00e0o b\u1ed9 nh\u1edb \u0111\u1ec7m. Sau \u0111\u00f3, khi ng\u01b0\u1eddi d\u00f9ng trong c\u00f9ng khu v\u1ef1c ho\u1eb7c c\u00e1c khu v\u1ef1c l\u00e2n c\u1eadn y\u00eau c\u1ea7u l\u1ea1i c\u00f9ng t\u00e0i nguy\u00ean \u0111\u00f3, n\u00fat c\u1ea1nh CDN s\u1ebd tr\u1ef1c ti\u1ebfp cung c\u1ea5p b\u1ea3n sao \u0111\u00e3 \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong b\u1ed9 nh\u1edb \u0111\u1ec7m, m\u00e0 kh\u00f4ng c\u1ea7n ph\u1ea3i truy c\u1eadp l\u1ea1i m\u00e1y ch\u1ee7 g\u1ed1c. \u0110i\u1ec1u n\u00e0y kh\u00f4ng ch\u1ec9 gi\u00fap t\u0103ng t\u1ed1c \u0111\u1ed9 ph\u1ea3n h\u1ed3i m\u1ed9t c\u00e1ch \u0111\u00e1ng k\u1ec3 m\u00e0 c\u00f2n gi\u00fap b\u1ea3o v\u1ec7 m\u00e1y ch\u1ee7 g\u1ed1c kh\u1ecfi \u00e1p l\u1ef1c v\u00e0 ti\u1ebft ki\u1ec7m l\u01b0u l\u01b0\u1ee3ng b\u0103ng th\u00f4ng.<\/p>\n\n\n\n

\u0110\u1ec3 \u0111\u1ea3m b\u1ea3o n\u1ed9i dung m\u00e0 ng\u01b0\u1eddi d\u00f9ng nh\u1eadn \u0111\u01b0\u1ee3c l\u00e0 m\u1edbi nh\u1ea5t, c\u00e1c nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 CDN (Content Delivery Network) \u0111\u00e3 tri\u1ec3n khai nhi\u1ec1u c\u01a1 ch\u1ebf l\u00e0m m\u1edbi v\u00e0 l\u00e0m \u1ea5m b\u1ed9 nh\u1edb \u0111\u1ec7m (cache). B\u1ea1n c\u00f3 th\u1ec3 t\u1ef1 \u0111\u1ed9ng x\u00f3a c\u00e1c b\u1ed9 nh\u1edb \u0111\u1ec7m \u0111\u00e3 h\u1ebft h\u1ea1n th\u00f4ng qua giao di\u1ec7n \u0111i\u1ec1u khi\u1ec3n ho\u1eb7c API, ho\u1eb7c tr\u01b0\u1edbc khi l\u01b0\u1ee3ng l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp t\u0103ng cao, b\u1ea1n c\u00f3 th\u1ec3 \u0111\u1ea9y c\u00e1c n\u1ed9i dung quan tr\u1ecdng l\u00ean c\u00e1c node ngo\u1ea1i vi (edge nodes) \u0111\u1ec3 l\u00e0m \u1ea5m b\u1ed9 nh\u1edb \u0111\u1ec7m, nh\u1eb1m \u0111\u1ea1t \u0111\u01b0\u1ee3c hi\u1ec7u su\u1ea5t t\u1ed1t nh\u1ea5t.<\/p>\n\n\n\n

\u0110i\u1ec1u ph\u1ed1i th\u00f4ng minh v\u00e0 c\u00e2n b\u1eb1ng t\u1ea3i<\/h3>\n\n\n\n

L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 \u0111\u1ecbnh h\u01b0\u1edbng ch\u00ednh x\u00e1c y\u00eau c\u1ea7u c\u1ee7a ng\u01b0\u1eddi d\u00f9ng \u0111\u1ebfn n\u00fat CDN t\u1ed1i \u01b0u nh\u1ea5t? \u0110i\u1ec1u n\u00e0y ph\u1ee5 thu\u1ed9c v\u00e0o m\u1ed9t h\u1ec7 th\u1ed1ng \u0111i\u1ec1u ph\u1ed1i DNS th\u00f4ng minh. C\u00e1ch gi\u1ea3i quy\u1ebft truy\u1ec1n th\u1ed1ng l\u00e0 DNS s\u1ebd gi\u1ea3i m\u00e3 t\u00ean mi\u1ec1n tr\u1ef1c ti\u1ebfp th\u00e0nh \u0111\u1ecba ch\u1ec9 IP c\u1ee7a m\u00e1y ch\u1ee7 ngu\u1ed3n; tuy nhi\u00ean, sau khi b\u1eadt ch\u1ee9c n\u0103ng CDN, t\u00ean mi\u1ec1n c\u1ee7a b\u1ea1n s\u1ebd \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh b\u1eb1ng b\u1ea3n ghi CNAME \u0111\u1ebfn t\u00ean mi\u1ec1n c\u1ee7a b\u1ed9 ph\u00e2n ph\u1ed1i t\u1ea3i to\u00e0n c\u1ea7u (GSLB) do nh\u00e0 cung c\u1ea5p CDN cung c\u1ea5p.<\/p>\n\n

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\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
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\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
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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
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\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
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\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
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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

Khi ng\u01b0\u1eddi d\u00f9ng g\u1eedi m\u1ed9t y\u00eau c\u1ea7u, h\u1ec7 th\u1ed1ng DNS \u0111\u1ecba ph\u01b0\u01a1ng s\u1ebd th\u1ef1c hi\u1ec7n cu\u1ed9c truy v\u1ea5n \u0111\u1ebfn GSLB (Global Server Load Balancer). GSLB s\u1ebd s\u1eed d\u1ee5ng m\u1ed9t algoritme ph\u1ee9c t\u1ea1p \u0111\u1ec3 xem x\u00e9t nhi\u1ec1u y\u1ebfu t\u1ed1 nh\u01b0 v\u1ecb tr\u00ed \u0111\u1ecba l\u00fd c\u1ee7a IP ng\u01b0\u1eddi d\u00f9ng, t\u1ea3i c\u00f4ng vi\u1ec7c th\u1ef1c t\u1ebf c\u1ee7a c\u00e1c node CDN, t\u00ecnh tr\u1ea1ng ho\u1ea1t \u0111\u1ed9ng c\u1ee7a ch\u00fang, c\u0169ng nh\u01b0 ch\u1ea5t l\u01b0\u1ee3ng k\u1ebft n\u1ed1i m\u1ea1ng (nh\u01b0 \u0111\u1ed9 tr\u1ec5, t\u1ef7 l\u1ec7 m\u1ea5t g\u00f3i tin), t\u1eeb \u0111\u00f3 x\u00e1c \u0111\u1ecbnh \u0111\u1ecba ch\u1ec9 IP c\u1ee7a node edge (node c\u1eadn c\u1ea5p) ph\u00f9 h\u1ee3p nh\u1ea5t v\u1edbi ng\u01b0\u1eddi d\u00f9ng \u0111\u00f3 v\u00e0 tr\u1ea3 v\u1ec1 k\u1ebft qu\u1ea3. Qu\u00e1 tr\u00ecnh n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n trong v\u00e0i miligi\u00e2y, ho\u00e0n to\u00e0n trong su\u1ed1t \u0111\u1ed1i v\u1edbi ng\u01b0\u1eddi d\u00f9ng, \u0111\u1ea3m b\u1ea3o r\u1eb1ng y\u00eau c\u1ea7u lu\u00f4n \u0111\u01b0\u1ee3c ph\u00e2n ph\u1ed1i \u0111\u1ebfn node nhanh nh\u1ea5t v\u00e0 \u1ed5n \u0111\u1ecbnh nh\u1ea5t.<\/p>\n\n\n\n

Nh\u1eefng l\u1ee3i th\u1ebf ch\u00ednh c\u1ee7a vi\u1ec7c tri\u1ec3n khai CDN (Content Delivery Network):<\/h2>\n\n\n\n

Vi\u1ec7c tri\u1ec3n khai CDN (Content Delivery Network) cho trang web mang l\u1ea1i nhi\u1ec1u l\u1ee3i \u00edch, kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 t\u0103ng t\u1ed1c \u0111\u1ed9 truy c\u1eadp. CDN n\u00e2ng cao hi\u1ec7u su\u1ea5t, gi\u1ea3m chi ph\u00ed v\u00e0 c\u1ea3i thi\u1ec7n t\u00ednh b\u1ea3o m\u1eadt cho trang web t\u1eeb ba kh\u00eda c\u1ea1nh ch\u00ednh: hi\u1ec7u n\u0103ng, chi ph\u00ed v\u00e0 b\u1ea3o m\u1eadt.<\/p>\n\n\n\n

N\u00e2ng cao t\u1ed1c \u0111\u1ed9 truy c\u1eadp to\u00e0n c\u1ea7u v\u00e0 tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng: \u0110\u00e2y l\u00e0 l\u1ee3i \u00edch tr\u1ef1c ti\u1ebfp nh\u1ea5t. B\u1eb1ng c\u00e1ch ph\u00e2n ph\u1ed1i n\u1ed9i dung th\u00f4ng qua c\u00e1c node ngo\u1ea1i vi (edge nodes), vi\u1ec7c truy\u1ec1n d\u1eef li\u1ec7u qua m\u1ea1ng \u0111\u01b0\u1ee3c gi\u1ea3m \u0111\u00e1ng k\u1ec3, gi\u00fap gi\u1ea3m \u0111\u1ed9 tr\u1ec5 v\u00e0 t\u1ef7 l\u1ec7 m\u1ea5t g\u00f3i tin, t\u1eeb \u0111\u00f3 r\u00fat ng\u1eafn th\u1eddi gian t\u1ea3i trang web v\u00e0 l\u00e0m cho vi\u1ec7c ph\u00e1t video tr\u1edf n\u00ean m\u01b0\u1ee3t m\u00e0 h\u01a1n. T\u1ed1c \u0111\u1ed9 cao h\u01a1n tr\u1ef1c ti\u1ebfp d\u1eabn \u0111\u1ebfn t\u1ef7 l\u1ec7 ng\u01b0\u1eddi d\u00f9ng r\u1eddi trang th\u1ea5p h\u01a1n, th\u1eddi gian \u1edf l\u1ea1i trang d\u00e0i h\u01a1n, v\u00e0 t\u1ef7 l\u1ec7 chuy\u1ec3n \u0111\u1ed5i cao h\u01a1n \u2013 \u0111i\u1ec1u n\u00e0y c\u1ef1c k\u1ef3 quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c ng\u00e0nh nh\u01b0 th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed, truy\u1ec1n th\u00f4ng, v\u00e0 gi\u00e1o<\/p>\n\n\n\n

\u0110\u1ea3m b\u1ea3o \u0111\u1ed9 s\u1eb5n s\u00e0ng cao v\u00e0 t\u00ednh li\u00ean t\u1ee5c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a d\u1ecbch v\u1ee5: CDN x\u00e2y d\u1ef1ng m\u1ed9t ki\u1ebfn tr\u00fac m\u1ea1ng ph\u00e2n t\u00e1n. Khi m\u1ed9t node ho\u1eb7c m\u1ea1ng khu v\u1ef1c g\u1eb7p s\u1ef1 c\u1ed1, h\u1ec7 th\u1ed1ng \u0111i\u1ec1u ph\u1ed1i th\u00f4ng minh s\u1ebd t\u1ef1 \u0111\u1ed9ng chuy\u1ec3n l\u01b0u l\u01b0\u1ee3ng sang c\u00e1c node kh\u00e1c \u0111ang ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng, gi\u00fap ng\u0103n ch\u1eb7n t\u00e1c \u0111\u1ed9ng c\u1ee7a c\u00e1c s\u1ef1 c\u1ed1 \u0111\u1ecba ph\u01b0\u01a1ng v\u00e0 c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng DDoS l\u00ean m\u00e1y ch\u1ee7 ngu\u1ed3n, t\u1eeb \u0111\u00f3 \u0111\u1ea3m b\u1ea3o d\u1ecbch v\u1ee5 lu\u00f4n c\u00f3 s\u1eb5n cho ng\u01b0\u1eddi d\u00f9ng v\u00e0 n\u00e2ng cao \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh c\u1ee7a trang web.<\/p>\n\n\n\n

Gi\u1ea3m b\u0103ng th\u00f4ng ngu\u1ed3n v\u00e0 chi ph\u00ed m\u00e1y ch\u1ee7: H\u1ea7u h\u1ebft c\u00e1c y\u00eau c\u1ea7u t\u1eeb ng\u01b0\u1eddi d\u00f9ng \u0111\u1ec1u \u0111\u01b0\u1ee3c x\u1eed l\u00fd b\u1edfi c\u00e1c n\u00fat c\u1ea1nh (edge nodes); ngu\u1ed3n (origin server) ch\u1ec9 c\u1ea7n x\u1eed l\u00fd c\u00e1c y\u00eau c\u1ea7u truy xu\u1ea5t n\u1ed9i dung t\u1eeb ngu\u1ed3n (back-to-source requests) v\u00e0 n\u1ed9i dung \u0111\u1ed9ng (dynamic content). \u0110i\u1ec1u n\u00e0y gi\u00fap ti\u1ebft ki\u1ec7m \u0111\u00e1ng k\u1ec3 b\u0103ng th\u00f4ng v\u00e0 t\u00e0i nguy\u00ean t\u00ednh to\u00e1n c\u1ee7a m\u00e1y ch\u1ee7, t\u1eeb \u0111\u00f3 gi\u1ea3m chi ph\u00ed c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng.<\/p>\n\n\n\n

N\u00e2ng cao t\u00ednh b\u1ea3o m\u1eadt c\u1ee7a trang web: C\u00e1c d\u1ecbch v\u1ee5 CDN ph\u1ed5 bi\u1ebfn \u0111\u1ec1u t\u00edch h\u1ee3p nhi\u1ec1u t\u00ednh n\u0103ng b\u1ea3o m\u1eadt nh\u01b0 ch\u1ed1ng l\u1ea1i c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng DDoS, cung c\u1ea5p b\u1ea3o v\u1ec7 b\u1eb1ng t\u01b0\u1eddng l\u1eeda \u1ee9ng d\u1ee5ng web (WAF), c\u1ea5u h\u00ecnh ch\u1ee9ng ch\u1ec9 SSL\/TLS \u0111\u1ec3 th\u1ef1c hi\u1ec7n m\u00e3 h\u00f3a HTTPS, v\u00e0 ch\u1ed1ng vi\u1ec7c sao ch\u00e9p tr\u00e1i ph\u00e9p n\u1ed9i dung trang web (hotlinking). L\u00e0 \u201ct\u01b0\u1eddng th\u00e0nh\u201d b\u1ea3o v\u1ec7 tr\u01b0\u1edbc m\u00e1y ch\u1ee7 ngu\u1ed3n, CDN c\u00f3 th\u1ec3 l\u1ecdc c\u00e1c l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp \u0111\u1ed9c h\u1ea1i, gi\u00fap b\u1ea3o v\u1ec7 m\u00e1y ch\u1ee7 ngu\u1ed3n kh\u1ecfi c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng tr\u1ef1c ti\u1ebfp.<\/p>\n\n\n\n

L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 ch\u1ecdn \u0111\u01b0\u1ee3c nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 CDN (Content Delivery Network) ph\u00f9 h\u1ee3p?<\/h2>\n\n\n\n

Tr\u01b0\u1edbc s\u1ef1 xu\u1ea5t hi\u1ec7n c\u1ee7a r\u1ea5t nhi\u1ec1u nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 CDN tr\u00ean th\u1ecb tr\u01b0\u1eddng, l\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 \u0111\u01b0a ra l\u1ef1a ch\u1ecdn \u0111\u00fang \u0111\u1eafn? B\u1ea1n c\u1ea7n \u0111\u00e1nh gi\u00e1 to\u00e0n di\u1ec7n t\u1eeb nhi\u1ec1u kh\u00eda c\u1ea1nh nh\u01b0 hi\u1ec7u su\u1ea5t, t\u00ednh n\u0103ng, \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh v\u00e0 chi ph\u00ed.<\/p>\n\n\n\n

\u0110\u00e1nh gi\u00e1 ph\u1ea1m vi ph\u1ee7 s\u00f3ng m\u1ea1ng v\u00e0 hi\u1ec7u su\u1ea5t<\/h3>\n\n\n\n

Quy m\u00f4 m\u1ea1ng l\u00e0 y\u1ebfu t\u1ed1 c\u01a1 b\u1ea3n. B\u1ea1n c\u1ea7n xem x\u00e9t s\u1ed1 l\u01b0\u1ee3ng node (n\u00fat truy\u1ec1n th\u00f4ng) c\u1ee7a nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 v\u00e0 xem li\u1ec7u ph\u00e2n b\u1ed1 \u0111\u1ecba l\u00fd c\u1ee7a ch\u00fang c\u00f3 ph\u1ee7 s\u00f3ng \u0111\u01b0\u1ee3c nh\u00f3m ng\u01b0\u1eddi d\u00f9ng m\u1ee5c ti\u00eau c\u1ee7a b\u1ea1n hay kh\u00f4ng. V\u00ed d\u1ee5, n\u1ebfu ng\u01b0\u1eddi d\u00f9ng c\u1ee7a b\u1ea1n ch\u1ee7 y\u1ebfu \u1edf trong n\u01b0\u1edbc, th\u00ec vi\u1ec7c ch\u1ecdn nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 trong n\u01b0\u1edbc c\u00f3 nhi\u1ec1u node \u1edf c\u1ea5p t\u1ec9nh v\u00e0 c\u00e1c nh\u00e0 khai th\u00e1c m\u1ea1ng l\u1edbn c\u00f3 th\u1ec3 s\u1ebd mang l\u1ea1i l\u1ee3i th\u1ebf h\u01a1n so v\u1edbi nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 qu\u1ed1c t\u1ebf; ng\u01b0\u1ee3c l\u1ea1i, n\u1ebfu doanh nghi\u1ec7p c\u1ee7a b\u1ea1n ho\u1ea1t \u0111\u1ed9ng tr\u00ean to\u00e0n c\u1ea7u, b\u1ea1n c\u1ea7n ch\u1ecdn nh\u00e0 cung c\u1ea5p c\u00f3 node ch\u1ea5t l\u01b0\u1ee3ng t\u1ed1t \u1edf c\u00e1c khu v\u1ef1c quan tr\u1ecdng nh\u01b0 Ch\u00e2u \u00c2u, B\u1eafc M\u1ef9, \u0110\u00f4ng<\/p>\n\n\n\n

C\u00e1c ch\u1ec9 s\u1ed1 hi\u1ec7u n\u0103ng c\u1ea7n \u0111\u01b0\u1ee3c \u0111o l\u01b0\u1eddng th\u1ef1c t\u1ebf. B\u1ea1n c\u00f3 th\u1ec3 theo d\u00f5i d\u1eef li\u1ec7u ki\u1ec3m th\u1eed chu\u1ea9n m\u00e0 nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 cung c\u1ea5p, nh\u01b0ng quan tr\u1ecdng h\u01a1n l\u00e0 h\u00e3y t\u1eadn d\u1ee5ng d\u1ecbch v\u1ee5 th\u1eed nghi\u1ec7m mi\u1ec5n ph\u00ed c\u1ee7a h\u1ecd \u0111\u1ec3 \u0111o t\u1ed1c \u0111\u1ed9 truy c\u1eadp v\u00e0o n\u1ed9i dung th\u1ef1c s\u1ef1 c\u1ee7a trang web c\u1ee7a b\u1ea1n. S\u1eed d\u1ee5ng c\u00e1c c\u00f4ng c\u1ee5 \u0111o t\u1ed1c \u0111\u1ed9 c\u1ee7a b\u00ean th\u1ee9 ba (nh\u01b0 WebPageTest, Dotcom-Tools) \u0111\u1ec3 ki\u1ec3m tra c\u00e1c ch\u1ec9 s\u1ed1 quan tr\u1ecdng nh\u01b0 th\u1eddi gian t\u1ea3i byte \u0111\u1ea7u ti\u00ean, th\u1eddi gian t\u1ea3i to\u00e0n b\u1ed9 trang web, t\u1eeb nhi\u1ec1u \u0111\u1ecba \u0111i\u1ec3m kh\u00e1c nhau tr\u00ean to\u00e0n c\u1ea7u.<\/p>\n\n\n\n

\u0110\u00e1nh gi\u00e1 c\u00e1c ch\u1ee9c n\u0103ng v\u00e0 kh\u1ea3 n\u0103ng h\u1ed7 tr\u1ee3 d\u1ecbch v\u1ee5<\/h3>\n\n\n\n

Ngo\u00e0i vi\u1ec7c t\u0103ng t\u1ed1c \u0111\u1ed9 truy\u1ec1n t\u1ea3i n\u1ed9i dung c\u01a1 b\u1ea3n, c\u00e1c h\u1ec7 th\u1ed1ng CDN (Content Delivery Network) hi\u1ec7n \u0111\u1ea1i c\u00f2n cung c\u1ea5p nhi\u1ec1u t\u00ednh n\u0103ng b\u1ed5 sung h\u1eefu \u00edch. V\u00ed d\u1ee5: li\u1ec7u ch\u00fang c\u00f3 h\u1ed7 tr\u1ee3 t\u0103ng t\u1ed1c \u0111\u1ed9 truy\u1ec1n t\u1ea3i video theo y\u00eau c\u1ea7u (video on-demand) v\u00e0 video tr\u1ef1c ti\u1ebfp (live streaming) hay kh\u00f4ng; li\u1ec7u ch\u00fang c\u00f3 cung c\u1ea5p c\u00e1c c\u00f4ng c\u1ee5 x\u1eed l\u00fd h\u00ecnh \u1ea3nh m\u1ea1nh m\u1ebd nh\u01b0 thu nh\u1ecf h\u00ecnh \u1ea3nh theo th\u1eddi gian th\u1ef1c, chuy\u1ec3n \u0111\u1ed5i \u0111\u1ecbnh d\u1ea1ng h\u00ecnh \u1ea3nh, th\u00eam watermark v\u00e0o h\u00ecnh \u1ea3nh hay kh\u00f4ng; li\u1ec7u ch\u00fang c\u00f3 h\u1ed7 tr\u1ee3 t\u0103ng t\u1ed1c \u0111\u1ed9 truy\u1ec1n t\u1ea3i n\u1ed9i dung \u0111\u1ed9ng m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 th\u00f4ng qua vi\u1ec7c t\u1ed1i \u01b0u h<\/p>\n\n\n\n

C\u00e1c d\u1ecbch v\u1ee5 h\u1ed7 tr\u1ee3 k\u1ef9 thu\u1eadt v\u00e0 t\u00e0i li\u1ec7u c\u0169ng quan tr\u1ecdng kh\u00f4ng k\u00e9m. H\u00e3y ki\u1ec3m tra xem h\u1ecd c\u00f3 cung c\u1ea5p d\u1ecbch v\u1ee5 h\u1ed7 tr\u1ee3 k\u1ef9 thu\u1eadt b\u1eb1ng ti\u1ebfng Trung 24\/7 kh\u00f4ng, t\u1ed1c \u0111\u1ed9 ph\u1ea3n h\u1ed3i c\u00e1c y\u00eau c\u1ea7u s\u1eeda ch\u1eefa (ticket) nh\u01b0 th\u1ebf n\u00e0o, v\u00e0 li\u1ec7u c\u00e1c t\u00e0i li\u1ec7u tr\u1ef1c tuy\u1ebfn c\u00f9ng kho ki\u1ebfn th\u1ee9c c\u00f3 \u0111\u01b0\u1ee3c tr\u00ecnh b\u00e0y m\u1ed9t c\u00e1ch \u0111\u1ea7y \u0111\u1ee7 v\u00e0 r\u00f5 r\u00e0ng hay kh\u00f4ng. M\u1ed9t d\u1ecbch v\u1ee5 h\u1ed7 tr\u1ee3 t\u1ed1t s\u1ebd gi\u00fap b\u1ea1n nhanh ch\u00f3ng x\u00e1c \u0111\u1ecbnh v\u00e0<\/p>\n\n\n\n

Ph\u00e2n t\u00edch m\u00f4 h\u00ecnh t\u00ednh ph\u00ed v\u00e0 hi\u1ec7u qu\u1ea3 chi ph\u00ed<\/h3>\n\n\n\n

C\u00e1c m\u00f4 h\u00ecnh t\u00ednh ph\u00ed c\u1ee7a CDN th\u01b0\u1eddng bao g\u1ed3m vi\u1ec7c t\u00ednh ph\u00ed theo l\u01b0\u1ee3ng d\u1eef li\u1ec7u truy\u1ec1n t\u1ea3i (traffic) v\u00e0 theo m\u1ee9c \u0111\u1ed9 s\u1eed d\u1ee5ng b\u0103ng th\u00f4ng (bandwidth peak). B\u1ea1n c\u1ea7n l\u1ef1a ch\u1ecdn ph\u01b0\u01a1ng th\u1ee9c t\u00ednh ph\u00ed ph\u00f9 h\u1ee3p nh\u1ea5t d\u1ef1a tr\u00ean m\u00f4 h\u00ecnh l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp c\u1ee7a doanh nghi\u1ec7p m\u00ecnh (l\u00e0 \u1ed5n \u0111\u1ecbnh hay th\u1ea5t th\u01b0\u1eddng). \u0110\u1ed3ng th\u1eddi, h\u00e3y so s\u00e1nh k\u1ef9 l\u01b0\u1ee1ng gi\u00e1 c\u1ea3 c\u1ee7a c\u00e1c nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 kh\u00e1c nhau, c\u0169ng nh\u01b0 s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 gi\u00e1 c\u1ea3 t\u1ea1i c\u00e1c khu v\u1ef1c kh\u00e1c nhau (nh\u01b0 Trung Qu\u1ed1c \u0110\u1ea1i l\u1ee5c, n\u01b0\u1edbc ngo\u00e0i), v\u00e0 ch\u00fa \u00fd \u0111\u1ebfn c\u00e1c chi ti\u1ebft nh\u01b0 ph\u00ed theo s\u1ed1 l\u01b0\u1ee3ng y\u00eau c\u1ea7u (request count) ho\u1eb7c li\u1ec7u c\u00e1c y\u00eau c\u1ea7u HTTPS c\u00f3 b\u1ecb t\u00ednh ph\u00ed th\u00eam hay kh\u00f4ng.<\/p>\n\n\n\n

C\u0169ng c\u1ea7n xem x\u00e9t \u0111\u1ebfn c\u00e1c \u01b0u \u0111\u00e3i nh\u01b0 chi\u1ebft kh\u1ea5u khi k\u00fd k\u1ebft h\u1ee3p \u0111\u1ed3ng d\u00e0i h\u1ea1n, c\u0169ng nh\u01b0 vi\u1ec7c c\u00f3 cung c\u1ea5p c\u00e1c g\u00f3i t\u00e0i nguy\u00ean (resource packs) hay kh\u00f4ng. T\u1ed5ng chi ph\u00ed s\u1edf h\u1eefu (Total Cost of Ownership \u2013 TCO) n\u00ean bao g\u1ed3m c\u1ea3 chi ph\u00ed b\u0103ng th\u00f4ng, chi ph\u00ed cho c\u00e1c t\u00ednh n\u0103ng b\u1ed5 sung v\u00e0 chi ph\u00ed h\u1ed7 tr\u1ee3.<\/p>\n\n\n\n

C\u00e1c ph\u01b0\u01a1ng ph\u00e1p th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t \u0111\u1ec3 tri\u1ec3n khai v\u00e0 t\u1ed1i \u01b0u h\u00f3a CDN<\/h2>\n\n\n\n

Sau khi l\u1ef1a ch\u1ecdn \u0111\u01b0\u1ee3c gi\u1ea3i ph\u00e1p ph\u00f9 h\u1ee3p, vi\u1ec7c c\u1ea5u h\u00ecnh \u0111\u00fang c\u00e1ch v\u00e0 li\u00ean t\u1ee5c t\u1ed1i \u01b0u h\u00f3a l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t \u0111\u1ec3 ph\u00e1t huy h\u1ebft ti\u1ec1m n\u0103ng c\u1ee7a CDN.<\/p>\n\n\n\n

C\u1ea5u h\u00ecnh chi\u1ebfn l\u01b0\u1ee3c l\u01b0u tr\u1eef \u0111\u1ec7m (cache) m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c<\/h3>\n\n\n\n

\u0110\u00e2y ch\u00ednh l\u00e0 tr\u1ecdng t\u00e2m c\u1ee7a vi\u1ec7c t\u1ed1i \u01b0u h\u00f3a. B\u1ea1n c\u1ea7n thi\u1ebft l\u1eadp th\u1eddi gian l\u01b0u tr\u1eef trong b\u1ed9 \u0111\u1ec7m (header Cache-Control\/Expires) kh\u00e1c nhau cho c\u00e1c lo\u1ea1i t\u00e0i nguy\u00ean kh\u00e1c nhau. \u0110\u1ed1i v\u1edbi c\u00e1c t\u00e0i nguy\u00ean t\u0129nh kh\u00f4ng bao gi\u1edd thay \u0111\u1ed5i (ch\u1eb3ng h\u1ea1n nh\u01b0 c\u00e1c t\u1ec7p c\u00f3 phi\u00ean b\u1ea3n \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a b\u1eb1ng hash), b\u1ea1n c\u00f3 th\u1ec3 thi\u1ebft l\u1eadp th\u1eddi gian l\u01b0u tr\u1eef trong b\u1ed9 \u0111\u1ec7m l\u00e0 m\u1ed9t n\u0103m; \u0111\u1ed1i v\u1edbi c\u00e1c t\u00e0i nguy\u00ean t\u0129nh c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt, b\u1ea1n c\u00f3 th\u1ec3 thi\u1ebft l\u1eadp th\u1eddi gian l\u01b0u tr\u1eef l\u00e0 v\u00e0i gi\u1edd ho\u1eb7c v\u00e0i ng\u00e0y; c\u00f2n \u0111\u1ed1i v\u1edbi c\u00e1c trang HTML \u0111\u01b0\u1ee3c t\u1ea1o ra m\u1ed9t c\u00e1ch \u0111\u1ed9ng, th\u00f4ng th\u01b0\u1eddng b\u1ea1n n\u00ean thi\u1ebft l\u1eadp th\u1eddi gian l\u01b0u tr\u1eef ng\u1eafn h\u01a1n ho\u1eb7c kh\u00f4ng l\u01b0u tr\u1eef ch\u00fang trong b\u1ed9 \u0111\u1ec7m.<\/p>\n\n\n\n

\u0110\u1ed3ng th\u1eddi, h\u00e3y t\u1eadn d\u1ee5ng t\u1ed1i \u0111a t\u00ednh n\u0103ng \u201cB\u1ecf qua b\u1ed9 \u0111\u1ec7m chu\u1ed7i truy v\u1ea5n\u201d (Ignore Query String Cache). \u0110\u1ed1i v\u1edbi c\u00e1c t\u00e0i nguy\u00ean c\u00f3 c\u00f9ng n\u1ed9i dung nh\u01b0ng ch\u1ee9a c\u00e1c tham s\u1ed1 truy v\u1ea5n kh\u00e1c nhau, vi\u1ec7c k\u00edch ho\u1ea1t t\u00ednh n\u0103ng n\u00e0y c\u00f3 th\u1ec3 gi\u00fap t\u0103ng \u0111\u00e1ng k\u1ec3 t\u1ef7 l\u1ec7 truy c\u1eadp v\u00e0o b\u1ed9 \u0111\u1ec7m. Ngo\u00e0i ra, vi\u1ec7c thi\u1ebft l\u1eadp \u0111\u00fang c\u00e1ch c\u00e1c quy t\u1eafc theo d\u00f5i ngu\u1ed3n d\u1eef li\u1ec7u (origin-pull) v\u00e0 c\u1ea5u h\u00ecnh \u0111\u1ea7u ti\u00eau \u0111\u1ec1 HOST ph\u00f9 h\u1ee3p c\u0169ng l\u00e0 nh\u1eefng b\u01b0\u1edbc c\u1ea7n thi\u1ebft \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o qu\u00e1 tr\u00ecnh truy c\u1eadp ngu\u1ed3n d\u1eef li\u1ec7u<\/p>\n\n\n\n

K\u00edch ho\u1ea1t c\u00e1c t\u00ednh n\u0103ng n\u00e2ng cao v\u1ec1 hi\u1ec7u su\u1ea5t v\u00e0 b\u1ea3o m\u1eadt<\/h3>\n\n\n\n

B\u1ea1n nh\u1ea5t \u0111\u1ecbnh ph\u1ea3i k\u00edch ho\u1ea1t v\u00e0 c\u1ea5u h\u00ecnh giao th\u1ee9c HTTPS cho t\u00ean mi\u1ec1n c\u1ee7a m\u00ecnh, s\u1eed d\u1ee5ng ch\u1ee9ng ch\u1ec9 SSL mi\u1ec5n ph\u00ed ho\u1eb7c \u0111\u01b0\u1ee3c cung c\u1ea5p b\u1edfi nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 CDN. \u0110i\u1ec1u n\u00e0y kh\u00f4ng ch\u1ec9 l\u00e0 y\u00eau c\u1ea7u v\u1ec1 b\u1ea3o m\u1eadt m\u00e0 c\u00f2n c\u00f3 t\u00e1c \u0111\u1ed9ng t\u00edch c\u1ef1c \u0111\u1ebfn hi\u1ec7u su\u1ea5t t\u00ecm ki\u1ebfm tr\u00ean trang web (SEO). Vi\u1ec7c k\u00edch ho\u1ea1t giao th\u1ee9c HTTP\/2 ho\u1eb7c HTTP\/3 (QUIC) c\u0169ng c\u00f3 th\u1ec3 gi\u00fap n\u00e2ng cao \u0111\u00e1ng k\u1ec3 t\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eef li\u1ec7u.<\/p>\n\n\n\n

B\u1eadt ch\u1ee9c n\u0103ng n\u00e9n th\u00f4ng minh (nh\u01b0 Gzip, Brotli) \u0111\u1ec3 gi\u1ea3m k\u00edch th\u01b0\u1edbc d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c truy\u1ec1n. C\u1ea5u h\u00ecnh c\u00e1c quy t\u1eafc c\u1ee7a B\u1ed9 l\u1ecdc Web (Web Application Firewall \u2013 WAF) theo nhu c\u1ea7u \u0111\u1ec3 b\u1ea3o v\u1ec7 trang web kh\u1ecfi c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng ph\u1ed5 bi\u1ebfn nh\u01b0 SQL injection, XSS, v.v. Thi\u1ebft l\u1eadp ch\u1ee9c n\u0103ng ch\u1ed1ng sao ch\u00e9p li\u00ean k\u1ebft (hotlink protection) \u0111\u1ec3 ng\u0103n c\u00e1c trang web kh\u00e1c s\u1eed d\u1ee5ng tr\u00e1i ph\u00e9p h\u00ecnh \u1ea3nh, video v\u00e0 c\u00e1c t\u00e0i nguy\u00ean kh\u00e1c c\u1ee7a b\u1ea1n, t\u1eeb \u0111\u00f3 ti\u1ebft ki\u1ec7m l\u01b0u l\u01b0\u1ee3ng d\u1eef li\u1ec7u kh\u00f4ng c\u1ea7n thi\u1ebft.<\/p>\n\n\n\n

Gi\u00e1m s\u00e1t li\u00ean t\u1ee5c v\u00e0 ph\u00e2n t\u00edch d\u1eef li\u1ec7u<\/h3>\n\n\n\n

\u0110\u1eebng ch\u1ec9 \u201cthi\u1ebft l\u1eadp xong r\u1ed3i b\u1ecf m\u1eb7c\u201d. H\u00e3y s\u1eed d\u1ee5ng c\u00e1c bi\u1ec3u \u0111\u1ed3 gi\u00e1m s\u00e1t \u0111\u01b0\u1ee3c cung c\u1ea5p b\u1edfi console c\u1ee7a nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 CDN \u0111\u1ec3 theo d\u00f5i li\u00ean t\u1ee5c c\u00e1c ch\u1ec9 s\u1ed1 quan tr\u1ecdng nh\u01b0 b\u0103ng th\u00f4ng, l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp, s\u1ed1 l\u01b0\u1ee3ng y\u00eau c\u1ea7u, t\u1ef7 l\u1ec7 truy c\u1eadp v\u00e0o b\u1ed9 nh\u1edb \u0111\u1ec7m (cache hit rate), v\u00e0 ph\u00e2n b\u1ed1 m\u00e3 tr\u1ea1ng th\u00e1i (status code distribution). T\u1ef7 l\u1ec7 truy c\u1eadp v\u00e0o b\u1ed9 nh\u1edb \u0111\u1ec7m l\u00e0 ch\u1ec9 s\u1ed1 then ch\u1ed1t \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 hi\u1ec7u qu\u1ea3 c\u1ee7a CDN; n\u1ebfu t\u1ef7 l\u1ec7 n\u00e0y qu\u00e1 th\u1ea5p, \u0111i\u1ec1u \u0111\u00f3 c\u00f3 ngh\u0129a l\u00e0 c\u00f3 qu\u00e1 nhi\u1ec1u y\u00eau c\u1ea7u \u0111\u01b0\u1ee3c g\u1eedi tr\u1ef1c ti\u1ebfp<\/p>\n\n\n\n

H\u00e3y th\u01b0\u1eddng xuy\u00ean ph\u00e2n t\u00edch nh\u1eadt k\u00fd truy c\u1eadp \u0111\u1ec3 n\u1eafm r\u00f5 th\u00f4ng tin v\u1ec1 c\u00e1c t\u1ec7p tin ph\u1ed5 bi\u1ebfn nh\u1ea5t, s\u1ef1 ph\u00e2n b\u1ed1 \u0111\u1ecba l\u00fd c\u1ee7a ng\u01b0\u1eddi d\u00f9ng v\u00e0 lo\u1ea1i thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng. Nh\u1eefng d\u1eef li\u1ec7u n\u00e0y s\u1ebd gi\u00fap b\u1ea1n t\u1ed1i \u01b0u h\u00f3a chi\u1ebfn l\u01b0\u1ee3c l\u01b0u tr\u1eef \u0111\u1ec7m (cache) m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 h\u01a1n, \u0111\u1ed3ng th\u1eddi cung c\u1ea5p c\u01a1 s\u1edf cho c\u00e1c quy\u1ebft \u0111\u1ecbnh kinh doanh quan tr\u1ecdng (ch\u1eb3ng h\u1ea1n nh\u01b0 t\u0103ng c<\/p>\n\n\n\n

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

CDN (Content Delivery Network) \u0111\u00e3 t\u1eeb m\u1ed9t d\u1ecbch v\u1ee5 n\u00e2ng cao t\u00f9y ch\u1ecdn, tr\u1edf th\u00e0nh c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng kh\u00f4ng th\u1ec3 thi\u1ebfu \u0111\u1ed1i v\u1edbi c\u00e1c trang web v\u00e0 \u1ee9ng d\u1ee5ng hi\u1ec7n \u0111\u1ea1i. B\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c n\u00fat \u0111\u1ecba l\u00fd \u0111\u01b0\u1ee3c ph\u00e2n b\u1ed1 tr\u00ean to\u00e0n th\u1ebf gi\u1edbi, c\u01a1 ch\u1ebf ph\u00e2n ph\u1ed1i l\u01b0u l\u01b0\u1ee3ng th\u00f4ng minh v\u00e0 h\u1ec7 th\u1ed1ng l\u01b0u tr\u1eef \u0111\u1ec7m (cache) hi\u1ec7u qu\u1ea3, CDN gi\u00fap gi\u1ea3i quy\u1ebft c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 \u0111\u1ed9 tr\u1ec5 k\u1ebft n\u1ed1i m\u1ea1ng, t\u1ea3i qu\u00e1 t\u1ea3i m\u00e1y ch\u1ee7 ngu\u1ed3n (server) v\u00e0 n\u00e2ng cao m\u1ee9c \u0111\u1ed9 s\u1eb5n s\u00e0ng ho\u1ea1t \u0111\u1ed9ng (high availability) m\u1ed9t c\u00e1ch c\u00f3 h\u1ec7 th\u1ed1ng. Vi\u1ec7c hi\u1ec3u r\u00f5 nguy\u00ean l\u00fd c\u1ed1t l\u00f5i c\u1ee7a s\u1ef1 k\u1ebft h\u1ee3p gi\u1eefa c\u00e1c ch\u1ee9c n\u0103ng l\u01b0u tr\u1eef \u0111\u1ec7m v\u00e0 ph\u00e2n ph\u1ed1i l\u01b0u l\u01b0\u1ee3ng l\u00e0 \u0111i\u1ec1u ki\u1ec7n ti\u00ean quy\u1ebft \u0111\u1ec3 t\u1eadn d\u1ee5ng t\u1ed1i \u0111a hi\u1ec7u qu\u1ea3 c\u1ee7a c\u00f4ng ngh\u1ec7 n\u00e0y. Khi l\u1ef1a ch\u1ecdn nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 CDN, b\u1ea1n c\u1ea7n c\u00e2n nh\u1eafc k\u1ef9 l\u01b0\u1ee1ng c\u00e1c y\u1ebfu t\u1ed1 nh\u01b0 hi\u1ec7u su\u1ea5t m\u1ea1ng, t\u00ednh ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u s\u1eed d\u1ee5ng, ch\u1ea5t l\u01b0\u1ee3ng h\u1ed7 tr\u1ee3 kh\u00e1ch h\u00e0ng v\u00e0 c\u1ea5u tr\u00fac chi ph\u00ed. Sau khi tri\u1ec3n khai th\u00e0nh c\u00f4ng, vi\u1ec7c c\u1ea5u h\u00ecnh chi\u1ebfn l\u01b0\u1ee3c l\u01b0u tr\u1eef \u0111\u1ec7m m\u1ed9t c\u00e1ch c\u1ea9n th\u1eadn, k\u00edch ho\u1ea1t c\u00e1c t\u00ednh n\u0103ng v\u1ec1 hi\u1ec7u su\u1ea5t v\u00e0 b\u1ea3o m\u1eadt, c\u00f9ng v\u1edbi vi\u1ec7c theo d\u00f5i v\u00e0 t\u1ed1i \u01b0u h\u00f3a d\u1eef li\u1ec7u li\u00ean t\u1ee5c, s\u1ebd gi\u00fap b\u1ea1n t\u1ed1i \u0111a h\u00f3a l\u1ee3i \u00edch t\u1eeb \u0111\u1ea7u t\u01b0 v\u00e0o CDN, t\u1eeb \u0111\u00f3 mang l\u1ea1i tr\u1ea3i nghi\u1ec7m truy c\u1eadp nhanh ch\u00f3ng, \u1ed5n \u0111\u1ecbnh v\u00e0 an to<\/p>\n\n\n\n

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

CDN c\u00f3 th\u1ec3 gi\u00fap t\u0103ng t\u1ed1c \u0111\u1ed9 truy c\u1eadp c\u00e1c n\u1ed9i dung \u0111\u1ed9ng (dynamic content) kh\u00f4ng?<\/h3>\n\n\n\n

Truy\u1ec1n th\u1ed1ng, CDN ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u0103ng t\u1ed1c \u0111\u1ed9 truy c\u1eadp c\u00e1c n\u1ed9i dung t\u0129nh. Tuy nhi\u00ean, \u0111\u1ed1i v\u1edbi c\u00e1c n\u1ed9i dung \u0111\u1ed9ng (ch\u1eb3ng h\u1ea1n nh\u01b0 c\u00e1c giao di\u1ec7n API, trang web \u0111\u01b0\u1ee3c c\u00e1 nh\u00e2n h\u00f3a), c\u00e1c c\u00f4ng ngh\u1ec7 CDN hi\u1ec7n \u0111\u1ea1i c\u0169ng c\u00f3 th\u1ec3 cung c\u1ea5p hi\u1ec7u qu\u1ea3 t\u0103ng t\u1ed1c th\u00f4ng qua vi\u1ec7c \u0111\u1ecbnh tuy\u1ebfn th\u00f4ng minh. C\u00e1c c\u00f4ng ngh\u1ec7 nh\u01b0 \u201ct\u0103ng t\u1ed1c \u0111\u1ed9ng\u201d (dynamic acceleration) ho\u1eb7c \u201ct\u0103ng t\u1ed1c to\u00e0n trang web\u201d (full-site acceleration) s\u1ebd t\u1ed1i \u01b0u h\u00f3a \u0111\u01b0\u1eddng truy\u1ec1n d\u1eef li\u1ec7u gi\u1eefa ng\u01b0\u1eddi d\u00f9ng v\u00e0 m\u00e1y ch\u1ee7 ngu\u1ed3n b\u1eb1ng c\u00e1ch ch\u1ecdn c\u00e1c k\u00eanh truy\u1ec1n d\u1eef li\u1ec7u \u1ed5n \u0111\u1ecbnh h\u01a1n, c\u00f3 \u0111\u1ed9 tr\u1ec5 th\u1ea5p h\u01a1n, v\u00e0 c\u00f3 th\u1ec3 c\u0169ng t\u1ed1i \u01b0u h\u00f3a giao th\u1ee9c TCP nh\u1eb1m gi\u1ea3m th\u1eddi gian truy\u1ec1n c\u00e1c y\u00eau c\u1ea7u \u0111\u1ed9ng. Tuy nhi\u00ean, c\u00e1c n\u1ed9i dung \u0111\u1ed9ng n\u00e0y th\u01b0\u1eddng kh\u00f4ng \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong b\u1ed9 nh\u1edb \u0111\u1ec7m (cache) tr\u1eeb khi \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh ri\u00eang bi\u1ec7t. Do \u0111\u00f3, hi\u1ec7u qu\u1ea3 t\u0103ng t\u1ed1c c\u1ee7a CDN \u0111\u1ed1i v\u1edbi n\u1ed9i dung \u0111\u1ed9ng ch\u1ee7 y\u1ebfu th\u1ec3 hi\u1ec7n \u1edf vi\u1ec7c t\u1ed1i \u01b0u h\u00f3a qu\u00e1 tr\u00ecnh truy\u1ec1n d\u1eef li\u1ec7u tr\u00ean m\u1ea1ng, ch\u1ee9 kh\u00f4ng ph\u1ea3i \u1edf vi\u1ec7c l\u01b0u tr\u1eef d\u1eef li\u1ec7u trong b\u1ed9 nh\u1edb \u0111\u1ec7m.<\/p>\n\n\n\n

S\u1eed d\u1ee5ng CDN c\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn SEO c\u1ee7a website t\u00f4i kh\u00f4ng?<\/h3>\n\n\n\n

Vi\u1ec7c c\u1ea5u h\u00ecnh v\u00e0 s\u1eed d\u1ee5ng CDN (Content Delivery Network) \u0111\u00fang c\u00e1ch c\u00f3 t\u00e1c \u0111\u1ed9ng t\u00edch c\u1ef1c \u0111\u1ebfn vi\u1ec7c t\u1ed1i \u01b0u h\u00f3a c\u00f4ng c\u1ee5 t\u00ecm ki\u1ebfm (SEO \u2013 Search Engine Optimization). C\u00e1c c\u00f4ng c\u1ee5 t\u00ecm ki\u1ebfm l\u1edbn nh\u01b0 Google \u0111\u00e3 coi t\u1ed1c \u0111\u1ed9 trang web l\u00e0 m\u1ed9t trong nh\u1eefng y\u1ebfu t\u1ed1 quan tr\u1ecdng trong vi\u1ec7c x\u1ebfp h\u1ea1ng. CDN gi\u00fap c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t t\u00ecm ki\u1ebfm b\u1eb1ng c\u00e1ch n\u00e2ng cao t\u1ed1c \u0111\u1ed9 truy c\u1eadp tr\u00ean to\u00e0n th\u1ebf gi\u1edbi v\u00e0 gi\u1ea3m th\u1eddi gian t\u1ea3i trang. Ngo\u00e0i ra, t\u00ednh s\u1eb5n s\u00e0ng cao m\u00e0 CDN mang l\u1ea1i \u0111\u1ea3m b\u1ea3o r\u1eb1ng trang web c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c truy c\u1eadp d\u1ec5 d\u00e0ng khi c\u00e1c c\u00f4ng c\u1ee5 thu th\u1eadp d\u1eef li\u1ec7u (crawlers) \u0111ang thu th\u1eadp th\u00f4ng tin. \u0110i\u1ec1u quan tr\u1ecdng c\u1ea7n l\u01b0u \u00fd l\u00e0 b\u1ea1n ph\u1ea3i \u0111\u1ea3m b\u1ea3o r\u1eb1ng CDN \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh \u0111\u00fang c\u00e1ch: v\u00ed d\u1ee5, c\u1ea7n thi\u1ebft l\u1eadp \u0111\u00fang th\u1ebb canonical, tr\u00e1nh t\u00ecnh tr\u1ea1ng tr\u00ec ho\u00e3n c\u1eadp nh\u1eadt n\u1ed9i dung do l\u1ed7i l\u01b0u tr\u1eef (cache), v\u00e0 t\u1ed1t nh\u1ea5t n\u00ean s\u1eed d\u1ee5ng c\u00e1c giao th\u1ee9c an to\u00e0n nh\u01b0 HTTPS \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 b\u1edfi c\u00e1c c\u00f4ng c\u1ee5 t\u00ecm ki\u1ebfm.<\/p>\n\n\n\n

L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o n\u1ed9i dung tr\u00ean CDN lu\u00f4n l\u00e0 phi\u00ean b\u1ea3n m\u1edbi nh\u1ea5t?<\/h3>\n\n\n\n

Vi\u1ec7c \u0111\u1ea3m b\u1ea3o n\u1ed9i dung \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt th\u01b0\u1eddng ph\u1ee5 thu\u1ed9c v\u00e0o ch\u00ednh s\u00e1ch h\u1ebft h\u1ea1n c\u1ee7a b\u1ed9 \u0111\u1ec7m (cache expiration policy) v\u00e0 c\u01a1 ch\u1ebf l\u00e0m m\u1edbi t\u1ef1 \u0111\u1ed9ng (active refresh mechanism). \u0110\u1ea7u ti\u00ean, b\u1ea1n c\u00f3 th\u1ec3 thi\u1ebft l\u1eadp c\u00e1c ti\u00eau \u0111\u1ec1 HTTP cache (HTTP cache headers) ph\u00f9 h\u1ee3p tr\u00ean m\u00e1y ch\u1ee7 ngu\u1ed3n (source server) cho t\u1eebng lo\u1ea1i t\u00e0i nguy\u00ean kh\u00e1c nhau. Cache-Control<\/code> \u7684 max-age<\/code>CDN (Content Delivery Network) s\u1ebd tu\u00e2n theo nh\u1eefng h\u01b0\u1edbng d\u1eabn n\u00e0y. Th\u1ee9 hai, khi n\u1ed9i dung tr\u00ean m\u00e1y ch\u1ee7 ngu\u1ed3n \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt, b\u1ea1n c\u00f3 th\u1ec3 ngay l\u1eadp t\u1ee9c g\u1eedi y\u00eau c\u1ea7u \u201ct\u00e1i t\u1ea3i\u201d th\u00f4ng qua giao di\u1ec7n \u0111i\u1ec1u khi\u1ec3n ho\u1eb7c API do nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 CDN cung c\u1ea5p, \u0111\u1ec3 bu\u1ed9c ph\u1ea3i x\u00f3a b\u1ecf b\u1ea3n cache c\u0169 t\u1ea1i c\u00e1c node bi\u00ean (edge nodes) cho URL ho\u1eb7c th\u01b0 m\u1ee5c \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh. Sau \u0111\u00f3, c\u00e1c y\u00eau c\u1ea7u t\u1eeb ng\u01b0\u1eddi d\u00f9ng m\u1edbi s\u1ebd \u0111\u01b0\u1ee3c truy xu\u1ea5t n\u1ed9i dung m\u1edbi t\u1eeb m\u00e1y ch\u1ee7 ngu\u1ed3n v\u00e0 \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef l\u1ea1i d\u01b0\u1edbi d\u1ea1ng cache. M\u1ed9t s\u1ed1 nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 c\u00f2n h\u1ed7 tr\u1ee3 c\u00e1c t\u00ednh n\u0103ng nh\u01b0 \u201ct\u00e1i t\u1ea3i to\u00e0n b\u1ed9 th\u01b0 m\u1ee5c\u201d v\u00e0 \u201cl\u00e0m n\u00f3ng n\u1ed9i dung tr\u01b0\u1edbc\u201d (preloading) \u0111\u1ec3 \u0111\u00e1p \u1ee9ng c\u00e1c nhu c\u1ea7u kinh doanh kh\u00e1c nhau.<\/p>\n\n\n\n

S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa CDN v\u00e0 d\u1ecbch v\u1ee5 l\u01b0u tr\u1eef \u0111\u00e1m m\u00e2y (nh\u01b0 AWS S3, Alibaba Cloud OSS) l\u00e0 g\u00ec?<\/h3>\n\n\n\n

CDN (Content Delivery Network) v\u00e0 d\u1ecbch v\u1ee5 l\u01b0u tr\u1eef \u0111\u00e1m m\u00e2y (cloud storage) c\u00f3 vai tr\u00f2 kh\u00e1c nhau, nh\u01b0ng th\u01b0\u1eddng ho\u1ea1t \u0111\u1ed9ng ph\u1ed1i h\u1ee3p v\u1edbi nhau. D\u1ecbch v\u1ee5 l\u01b0u tr\u1eef \u0111\u00e1m m\u00e2y l\u00e0 m\u1ed9t d\u1ecbch v\u1ee5 l\u01b0u tr\u1eef d\u1ea1ng \u0111\u1ed1i t\u01b0\u1ee3ng (object storage), ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 l\u01b0u tr\u1eef d\u1eef li\u1ec7u l\u1edbn, kh\u00f4ng c\u00f3 c\u1ea5u tr\u00fac (nh\u01b0 h\u00ecnh \u1ea3nh, video, t\u1ec7p sao l\u01b0u) m\u1ed9t c\u00e1ch b\u1ec1n v\u1eefng v\u00e0 v\u1edbi chi ph\u00ed th\u1ea5p. D\u1ecbch v\u1ee5 n\u00e0y cung c\u1ea5p c\u00e1c \u0111i\u1ec3m truy c\u1eadp (access endpoints) cho ng\u01b0\u1eddi d\u00f9ng, nh\u01b0ng th\u01b0\u1eddng kh\u00f4ng \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a \u0111\u1eb7c bi\u1ec7t cho vi\u1ec7c truy c\u1eadp t\u1eeb kh\u1eafp n\u01a1i tr\u00ean th\u1ebf gi\u1edbi. CDN, m\u1eb7t kh\u00e1c, l\u00e0 m\u1ed9t m\u1ea1ng l\u01b0\u1edbi ph\u00e2n ph\u1ed1i n\u1ed9i dung (content distribution network) nh\u1eb1m m\u1ee5c \u0111\u00edch t\u0103ng t\u1ed1c \u0111\u1ed9 truy c\u1eadp v\u00e0 ph\u00e2n ph\u1ed1i n\u1ed9i dung. M\u1ed9t thi\u1ebft k\u1ebf \u0111i\u1ec3n h\u00ecnh l\u00e0 \u0111\u1eb7t trang web ngu\u1ed3n (source website) tr\u00ean c\u00e1c th\u00f9ng l\u01b0u tr\u1eef \u0111\u00e1m m\u00e2y, sau \u0111\u00f3 s\u1eed d\u1ee5ng CDN \u0111\u1ec3 t\u0103ng t\u1ed1c \u0111\u1ed9 truy c\u1eadp v\u00e0o n\u1ed9i dung trong nh\u1eefng th\u00f9ng l\u01b0u tr\u1eef \u0111\u00f3. S\u1ef1 k\u1ebft h\u1ee3p n\u00e0y t\u1eadn d\u1ee5ng \u0111\u01b0\u1ee3c c\u1ea3 kh\u1ea3 n\u0103ng l\u01b0u tr\u1eef gi\u00e1 r\u1ebb c\u1ee7a d\u1ecbch v\u1ee5 l\u01b0u tr\u1eef \u0111\u00e1m m\u00e2y v\u00e0 kh\u1ea3 n\u0103ng ph\u00e2n ph\u1ed1i nhanh ch\u00f3ng c\u1ee7a CDN, t\u1ea1o th\u00e0nh m\u1ed9t gi\u1ea3i ph\u00e1p hi\u1ec7u qu\u1ea3 v\u00e0<\/p>","protected":false},"excerpt":{"rendered":"

B\u00e0i vi\u1ebft n\u00e0y tr\u00ecnh b\u00e0y m\u1ed9t c\u00e1ch h\u1ec7 th\u1ed1ng c\u00e1c nguy\u00ean l\u00fd c\u1ed1t l\u00f5i c\u1ee7a CDN (Content Delivery Network) trong vi\u1ec7c t\u0103ng t\u1ed1c truy c\u1eadp v\u00e0o trang web v\u00e0 gi\u1ea3m b\u1edbt \u00e1p l\u1ef1c l\u00ean m\u00e1y ch\u1ee7 ngu\u1ed3n th\u00f4ng qua vi\u1ec7c l\u01b0u tr\u1eef n\u1ed9i dung t\u1ea1i c\u00e1c node bi\u00ean gi\u1edbi tr\u00ean to\u00e0n c\u1ea7u v\u00e0 s\u1ef1 \u0111i\u1ec1u ph\u1ed1i th\u00f4ng minh c\u1ee7a h\u1ec7 th\u1ed1ng DNS. B\u00e0i vi\u1ebft c\u0169ng ph\u00e2n t\u00edch nh\u1eefng \u01b0u \u0111i\u1ec3m quan tr\u1ecdng c\u1ee7a CDN trong vi\u1ec7c n\u00e2ng cao hi\u1ec7u su\u1ea5t, \u0111\u1ea3m b\u1ea3o t\u00ednh kh\u1ea3 d\u1ee5ng v\u00e0 t\u0103ng c\u01b0\u1eddng b\u1ea3o m\u1eadt. Cu\u1ed1i c\u00f9ng, b\u00e0i vi\u1ebft cung c\u1ea5p h\u01b0\u1edbng d\u1eabn \u0111\u00e1nh gi\u00e1 c\u00e1c nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 CDN d\u1ef1a tr\u00ean nhi\u1ec1u ti\u00eau ch\u00ed kh\u00e1c nhau nh\u01b0 ph\u1ea1m vi ph\u1ee7 s\u00f3ng m<\/p>","protected":false},"author":7,"featured_media":0,"template":"","meta":{"_acf_changed":false,"footnotes":""},"tags":[],"knowledge_category":[278],"class_list":["post-12368925","knowledge_post","type-knowledge_post","status-publish","hentry","knowledge_category-cdn"],"acf":{"site_seo_keywords":"CDN\u6280\u672f,\u5185\u5bb9\u5206\u53d1\u7f51\u7edc,\u7f51\u7ad9\u52a0\u901f,CDN\u9009\u578b,\u7f13\u5b58\u673a\u5236,\u5168\u7403\u8d1f\u8f7d\u5747\u8861,CDN\u4f18\u52bf,CDN\u670d\u52a1\u5546\u9009\u62e9"},"_links":{"self":[{"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/knowledge_posts\/12368925","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\/12368925\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/media?parent=12368925"}],"wp:term":[{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/tags?post=12368925"},{"taxonomy":"knowledge_category","embeddable":true,"href":"https:\/\/www.likacloud.com\/vi\/wp-json\/wp\/v2\/knowledge_category?post=12368925"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}