H\u00e3y h\u00ecnh dung DFD nh\u01b0 m\u1ed9tb\u1ea3n \u0111\u1ed3 t\u00e0u \u0111i\u1ec7n ng\u1ea7m<\/strong>\u2014ch\u00fang cho b\u1ea1n th\u1ea5y c\u00e1c tuy\u1ebfn \u0111\u01b0\u1eddng m\u00e0 d\u1eef li\u1ec7u \u0111i qua h\u1ec7 th\u1ed1ng, t\u1eadp trung v\u00e0o h\u00e0nh tr\u00ecnh c\u1ee7a th\u00f4ng tin. Trong khi \u0111\u00f3, m\u00f4 h\u00ecnh C4 gi\u1ed1ng nh\u01b0Google Maps<\/strong>\u2014n\u00f3 cho ph\u00e9p b\u1ea1n ph\u00f3ng to thu nh\u1ecf t\u1eeb g\u00f3c nh\u00ecn to\u00e0n ch\u00e2u l\u1ee5c xu\u1ed1ng chi ti\u1ebft t\u1eebng con ph\u1ed1, ti\u1ebft l\u1ed9 c\u00e1c l\u1edbp c\u1ea5u tr\u00fac c\u1ee7a ph\u1ea7n m\u1ec1m c\u1ee7a b\u1ea1n.<\/p>\n H\u01b0\u1edbng d\u1eabn n\u00e0y s\u1ebd \u0111i s\u00e2u v\u00e0o c\u1ea3 hai ph\u01b0\u01a1ng ph\u00e1p, cung c\u1ea5p c\u00e1c v\u00ed d\u1ee5 c\u1ee5 th\u1ec3 v\u00e0 gi\u00fap b\u1ea1n hi\u1ec3u khi n\u00e0o n\u00ean s\u1eed d\u1ee5ng t\u1eebng ph\u01b0\u01a1ng ph\u00e1p.<\/p>\n Ph\u00e2n t\u00edch c\u1ea5u tr\u00fac, ph\u01b0\u01a1ng ph\u00e1p n\u1ec1n t\u1ea3ng c\u1ee7a DFD, l\u00e0 m\u1ed9tph\u01b0\u01a1ng ph\u00e1p \u0111\u1ecbnh h\u01b0\u1edbng quy tr\u00ecnh<\/strong>. Nguy\u00ean t\u1eafc c\u1ed1t l\u00f5i l\u00e0 x\u00e1c \u0111\u1ecbnh h\u1ec7 th\u1ed1ng c\u1ea7n l\u00e0m g\u00ec tr\u01b0\u1edbc khi quy\u1ebft \u0111\u1ecbnh l\u00e0m nh\u01b0 th\u1ebf n\u00e0o. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y t\u1eadp trung v\u00e0o vi\u1ec7c ph\u00e2n t\u00edch h\u00e0nh vi theo ch\u1ee9c n\u0103ng\u2014chia nh\u1ecf m\u1ed9t v\u1ea5n \u0111\u1ec1 l\u1edbn, ph\u1ee9c t\u1ea1p th\u00e0nh c\u00e1c ph\u1ea7n nh\u1ecf h\u01a1n, d\u1ec5 qu\u1ea3n l\u00fd h\u01a1n.<\/p>\n C\u00e2u h\u1ecfi then ch\u1ed1t m\u00e0 DFD tr\u1ea3 l\u1eddi:\u201cD\u1eef li\u1ec7u \u0111i qua h\u1ec7 th\u1ed1ng nh\u01b0 th\u1ebf n\u00e0o?\u201d<\/strong><\/p>\n DFD s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p c\u00f3 l\u1edbp, ph\u00e2n c\u1ea5p. Kh\u00e1i ni\u1ec7m r\u1ea5t \u0111\u01a1n gi\u1ea3n: b\u1eaft \u0111\u1ea7u t\u1eeb c\u00e1i nh\u00ecn t\u1ed5ng quan v\u00e0 d\u1ea7n ph\u00e1t tri\u1ec3n chi ti\u1ebft. C\u00e1c s\u01a1 \u0111\u1ed3 DFD ph\u00e2n c\u1ea5p d\u1ec5 hi\u1ec3u h\u01a1n so v\u1edbi m\u1ed9t s\u01a1 \u0111\u1ed3 chi ti\u1ebft l\u1edbn v\u00e0 ph\u1ee9c t\u1ea1p duy nh\u1ea5t.<\/p>\n C\u1ea5p \u0111\u1ed9 0 \u2013 S\u01a1 \u0111\u1ed3 b\u1ed1i c\u1ea3nh (c\u1ea5p \u0111\u1ed9 cao nh\u1ea5t)<\/strong><\/p>\n S\u01a1 \u0111\u1ed3 DFD c\u1ea5p \u0111\u1ed9 cao nh\u1ea5t ch\u1ee9a m\u1ed9t qu\u00e1 tr\u00ecnh duy nh\u1ea5t \u0111\u1ea1i di\u1ec7n cho to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng. N\u00f3 th\u1ec3 hi\u1ec7n:<\/p>\n H\u1ec7 th\u1ed1ng d\u01b0\u1edbi d\u1ea1ng m\u1ed9t \u201ch\u1ed9p \u0111en\u201d duy nh\u1ea5t<\/p>\n<\/li>\n C\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i (ng\u01b0\u1eddi d\u00f9ng, c\u00e1c h\u1ec7 th\u1ed1ng kh\u00e1c)<\/p>\n<\/li>\n Lu\u1ed3ng d\u1eef li\u1ec7u \u0111\u1ea7u v\u00e0o (\u0111i v\u00e0o)<\/p>\n<\/li>\n Lu\u1ed3ng d\u1eef li\u1ec7u \u0111\u1ea7u ra (\u0111i ra)<\/p>\n<\/li>\n<\/ul>\n \u0110i\u1ec1u n\u00e0y x\u00e1c \u0111\u1ecbnh ph\u1ea1m vi c\u1ee7a h\u1ec7 th\u1ed1ng v\u00e0 c\u00e1c m\u1ed1i quan h\u1ec7 trao \u0111\u1ed5i d\u1eef li\u1ec7u c\u1ee7a n\u00f3 v\u1edbi th\u1ebf gi\u1edbi b\u00ean ngo\u00e0i.<\/p>\n M\u1ee9c 1 \u2013 C\u00e1c quy tr\u00ecnh ch\u00ednh<\/strong><\/p>\n S\u01a1 \u0111\u1ed3 b\u1ed1i c\u1ea3nh \u0111\u01b0\u1ee3c “m\u1edf r\u1ed9ng” \u0111\u1ec3 ti\u1ebft l\u1ed9 c\u00e1c quy tr\u00ecnh ch\u00ednh b\u00ean trong h\u1ec7 th\u1ed1ng. M\u1ed7i ch\u1ee9c n\u0103ng ch\u00ednh tr\u1edf th\u00e0nh m\u1ed9t b\u1ecdt quy tr\u00ecnh ri\u00eang bi\u1ec7t v\u1edbi c\u00e1c \u0111\u1ea7u v\u00e0o v\u00e0 \u0111\u1ea7u ra ri\u00eang c\u1ee7a n\u00f3. C\u00e1c kho d\u1eef li\u1ec7u (c\u01a1 s\u1edf d\u1eef li\u1ec7u, t\u1ec7p tin) xu\u1ea5t hi\u1ec7n \u1edf m\u1ee9c n\u00e0y.<\/p>\n M\u1ee9c 2 v\u00e0 cao h\u01a1n \u2013 C\u00e1c quy tr\u00ecnh con<\/strong><\/p>\n M\u1ed7i quy tr\u00ecnh m\u1ee9c 1 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ph\u00e2n t\u00edch s\u00e2u h\u01a1n th\u00e0nh c\u00e1c quy tr\u00ecnh con. Qu\u00e1 tr\u00ecnh n\u00e0y ti\u1ebfp t\u1ee5c cho \u0111\u1ebfn khi c\u00e1c quy tr\u00ecnh tr\u1edf th\u00e0nh “nguy\u00ean t\u1eed” \u2013 \u0111\u01a1n gi\u1ea3n \u0111\u1ebfn m\u1ee9c kh\u00f4ng th\u1ec3 ho\u1eb7c kh\u00f4ng n\u00ean ph\u00e2n t\u00edch s\u00e2u h\u01a1n. C\u00e1c quy t\u1eafc \u0111\u00e1nh s\u1ed1 (1, 1.1, 1.1.1, v.v.) theo d\u00f5i th\u1ee9 t\u1ef1 ph\u00e2n c\u1ea5p.<\/p>\n M\u1ed9t r\u00e0ng bu\u1ed9c quan tr\u1ecdng trong vi\u1ec7c ph\u00e2n t\u00edch DFD theo h\u01b0\u1edbng t\u1eeb tr\u00ean xu\u1ed1ng l\u00e0c\u00e2n b\u1eb1ng<\/strong>: c\u00e1c \u0111\u1ea7u v\u00e0o v\u00e0 \u0111\u1ea7u ra ph\u1ea3i \u0111\u01b0\u1ee3c b\u1ea3o to\u00e0n gi\u1eefa c\u00e1c m\u1ee9c. M\u1ee9c n v\u00e0 m\u1ee9c n+1 ph\u1ea3i c\u00f3 c\u00f9ng \u0111\u1ea7u v\u00e0o v\u00e0 \u0111\u1ea7u ra.<\/p>\n V\u00ed d\u1ee5, n\u1ebfu Quy tr\u00ecnh 1 \u1edf m\u1ee9c 1 c\u00f3 \u0111\u1ea7u v\u00e0o A v\u00e0 B v\u00e0 \u0111\u1ea7u ra C, th\u00ec vi\u1ec7c ph\u00e2n t\u00edch \u1edf m\u1ee9c 2 ph\u1ea3i hi\u1ec3n th\u1ecb ch\u00ednh x\u00e1c c\u00f9ng c\u00e1c \u0111\u1ea7u v\u00e0o (A, B) v\u00e0 \u0111\u1ea7u ra (C), ch\u1ec9 \u0111\u01b0\u1ee3c ph\u00e2n b\u1ed1 gi\u1eefa c\u00e1c quy tr\u00ecnh con.<\/p>\n S\u01a1 \u0111\u1ed3 b\u1ed1i c\u1ea3nh (m\u1ee9c 0):<\/strong><\/p>\n S\u01a1 \u0111\u1ed3 DFD m\u1ee9c 1:<\/strong><\/p>\n \u00a0<\/p>\n DFD \u0111\u1eb7c bi\u1ec7t hi\u1ec7u qu\u1ea3 trong c\u00e1c tr\u01b0\u1eddng h\u1ee3p:<\/p>\n Hi\u1ec3u r\u00f5 c\u00e1c h\u1ec7 th\u1ed1ng c\u0169<\/strong>: Khi b\u1ea1n c\u1ea7n hi\u1ec3u c\u00e1ch d\u1eef li\u1ec7u ch\u1ea3y qua m\u1ed9t h\u1ec7 th\u1ed1ng hi\u1ec7n c\u00f3<\/p>\n<\/li>\n C\u00e1c t\u00ecnh hu\u1ed1ng \u0111\u1ecbnh h\u01b0\u1edbng theo quy tr\u00ecnh<\/strong>: Khi m\u1ed1i quan t\u00e2m ch\u00ednh l\u00e0 d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c x\u1eed l\u00fd nh\u01b0 th\u1ebf n\u00e0o, ch\u1ee9 kh\u00f4ng ph\u1ea3i m\u00e3 ngu\u1ed3n n\u1eb1m \u1edf \u0111\u00e2u<\/p>\n<\/li>\n M\u00f4 h\u00ecnh h\u00f3a m\u1ed1i \u0111e d\u1ecda<\/strong>: DFD th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh c\u00e1c lu\u1ed3ng d\u1eef li\u1ec7u c\u1ea7n ph\u00e2n t\u00edch b\u1ea3o m\u1eadt<\/p>\n<\/li>\n Ph\u00e2n t\u00edch quy tr\u00ecnh kinh doanh<\/strong>: Khi c\u1ea7n l\u1ea5p \u0111\u1ea7y kho\u1ea3ng c\u00e1ch gi\u1eefa y\u00eau c\u1ea7u kinh doanh v\u00e0 tri\u1ec3n khai k\u1ef9 thu\u1eadt<\/p>\n<\/li>\n<\/ul>\n M\u00f4 h\u00ecnh C4 ti\u1ebfp c\u1eadn theo c\u00e1chti\u1ebfp c\u1eadn \u01b0u ti\u00ean tr\u1eebu t\u01b0\u1ee3ng h\u00f3a<\/strong>khi v\u1ebd s\u01a1 \u0111\u1ed3 ki\u1ebfn tr\u00fac ph\u1ea7n m\u1ec1m. N\u00f3 ph\u1ea3n \u00e1nh c\u00e1ch c\u00e1c ki\u1ebfn tr\u00fac s\u01b0 ph\u1ea7n m\u1ec1m v\u00e0 nh\u00e0 ph\u00e1t tri\u1ec3n suy ngh\u0129 v\u00e0 x\u00e2y d\u1ef1ng ph\u1ea7n m\u1ec1m. Thay v\u00ec t\u1eadp trung v\u00e0o lu\u1ed3ng d\u1eef li\u1ec7u, C4 ti\u1ebft l\u1ed9 c\u00e1c l\u1edbp c\u1ea5u tr\u00fac c\u1ee7a h\u1ec7 th\u1ed1ng \u2013 ai s\u1eed d\u1ee5ng n\u00f3, c\u00e1c th\u00e0nh ph\u1ea7n ch\u00ednh l\u00e0 g\u00ec, v\u00e0 ch\u00fang \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng nh\u01b0 th\u1ebf n\u00e0o.<\/p>\n C\u00e2u h\u1ecfi then ch\u1ed1t m\u00e0 C4 tr\u1ea3 l\u1eddi:\u201cC\u00e1c b\u1ed9 ph\u1eadn c\u1ee7a h\u1ec7 th\u1ed1ng l\u00e0 g\u00ec, v\u00e0 ch\u00fang k\u1ebft h\u1ee3p v\u1edbi nhau nh\u01b0 th\u1ebf n\u00e0o?\u201d<\/strong><\/p>\n M\u00f4 h\u00ecnh C4 \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng d\u1ef1a tr\u00ean m\u1ed9t ph\u00e9p so s\u00e1nh \u0111\u01a1n gi\u1ea3n: ph\u00f3ng to b\u1ea3n \u0111\u1ed3.<\/p>\n C\u1ea5p \u0111\u1ed9 1: B\u1ed1i c\u1ea3nh h\u1ec7 th\u1ed1ng<\/strong><\/p>\n \u0110\u00e2y l\u00e0 g\u00f3c nh\u00ecn t\u1eeb \u0111\u1ed9 cao 30.000 feet\u2014g\u00f3c nh\u00ecn r\u1ed9ng nh\u1ea5t. N\u00f3 th\u1ec3 hi\u1ec7n:<\/p>\n H\u1ec7 th\u1ed1ng c\u1ee7a b\u1ea1n \u1edf trung t\u00e2m<\/p>\n<\/li>\n C\u00e1c ng\u01b0\u1eddi d\u00f9ng t\u01b0\u01a1ng t\u00e1c v\u1edbi n\u00f3 (c\u00e1c nh\u00e2n v\u1eadt)<\/p>\n<\/li>\n C\u00e1c h\u1ec7 th\u1ed1ng b\u00ean ngo\u00e0i kh\u00e1c m\u00e0 n\u00f3 ph\u1ee5 thu\u1ed9c v\u00e0o<\/p>\n<\/li>\n C\u00e1c t\u01b0\u01a1ng t\u00e1c c\u1ea5p cao gi\u1eefa ch\u00fang<\/p>\n<\/li>\n<\/ul>\n S\u01a1 \u0111\u1ed3 n\u00e0y d\u00e0nh chom\u1ecdi ng\u01b0\u1eddi<\/strong>: c\u00e1c b\u00ean li\u00ean quan, ng\u01b0\u1eddi qu\u1ea3n l\u00fd s\u1ea3n ph\u1ea9m, nh\u00e0 ph\u00e1t tri\u1ec3n v\u00e0 c\u00e1c th\u00e0nh vi\u00ean nh\u00f3m kh\u00f4ng chuy\u00ean k\u1ef9 thu\u1eadt. N\u00f3 x\u00e1c \u0111\u1ecbnh ph\u1ea1m vi d\u1ef1 \u00e1n v\u00e0 v\u1ea5n \u0111\u1ec1 \u0111ang \u0111\u01b0\u1ee3c gi\u1ea3i quy\u1ebft.<\/p>\n C\u1ea5p \u0111\u1ed9 2: C\u00e1c container<\/strong><\/p>\n C\u1ea5p \u0111\u1ed9 n\u00e0y ph\u00f3ng to v\u00e0o h\u1ec7 th\u1ed1ng \u0111\u1ec3 hi\u1ec3n th\u1ecb ki\u1ebfn tr\u00fac k\u1ef9 thu\u1eadt c\u1ea5p cao. M\u1ed9t “container” kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t container Docker\u2014n\u00f3 l\u00e0 b\u1ea5t k\u1ef3 \u0111\u01a1n v\u1ecb n\u00e0o\u00a0c\u00f3 th\u1ec3 tri\u1ec3n khai \u0111\u1ed9c l\u1eadp<\/strong>\u0111\u01a1n v\u1ecb:<\/p>\n \u1ee8ng d\u1ee5ng web (SPAs, \u1ee9ng d\u1ee5ng di \u0111\u1ed9ng)<\/p>\n<\/li>\n M\u00e1y ch\u1ee7 web v\u00e0 API<\/p>\n<\/li>\n C\u01a1 s\u1edf d\u1eef li\u1ec7u<\/p>\n<\/li>\n H\u00e0m kh\u00f4ng m\u00e1y ch\u1ee7<\/p>\n<\/li>\n B\u0103ng th\u00f4ng tin<\/p>\n<\/li>\n Microservice<\/p>\n<\/li>\n<\/ul>\n C\u1ea5p \u0111\u1ed9 n\u00e0y ti\u1ebft l\u1ed9 c\u00e1c l\u1ef1a ch\u1ecdn c\u00f4ng ngh\u1ec7 v\u00e0 c\u00e1c m\u1eabu giao ti\u1ebfp gi\u1eefa c\u00e1c container.<\/p>\n C\u1ea5p \u0111\u1ed9 3: C\u00e1c th\u00e0nh ph\u1ea7n<\/strong><\/p>\n Ph\u00f3ng to th\u00eam v\u00e0o m\u1ed9t container duy nh\u1ea5t, s\u01a1 \u0111\u1ed3 th\u00e0nh ph\u1ea7n ti\u1ebft l\u1ed9 c\u00e1c kh\u1ed1i x\u00e2y d\u1ef1ng c\u1ea5u tr\u00fac ch\u00ednh b\u00ean trong container \u0111\u00f3. C\u00e1c th\u00e0nh ph\u1ea7n \u0111\u1ea1i di\u1ec7n cho c\u00e1c nh\u00f3m m\u00e3 logic:<\/p>\n Controllers (x\u1eed l\u00fd y\u00eau c\u1ea7u HTTP)<\/p>\n<\/li>\n L\u1edbp d\u1ecbch v\u1ee5 (logic kinh doanh)<\/p>\n<\/li>\n L\u1edbp kho l\u01b0u tr\u1eef (truy c\u1eadp d\u1eef li\u1ec7u)<\/p>\n<\/li>\n B\u1ed9 chuy\u1ec3n \u0111\u1ed5i v\u00e0 c\u1ed5ng giao ti\u1ebfp<\/p>\n<\/li>\n<\/ul>\n \u0110i\u1ec1u n\u00e0y t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi s\u01a1 \u0111\u1ed3 th\u00e0nh ph\u1ea7n UML nh\u01b0ng v\u1edbi c\u00e1c quy t\u1eafc \u00edt nghi\u00eam ng\u1eb7t h\u01a1n.<\/p>\n C\u1ea5p \u0111\u1ed9 4: M\u00e3 ngu\u1ed3n<\/strong><\/p>\n M\u1ee9c \u0111\u1ed9 s\u00e2u nh\u1ea5t, cho th\u1ea5y c\u00e1ch m\u00e3 ngu\u1ed3n c\u1ee7a m\u1ed9t th\u00e0nh ph\u1ea7n duy nh\u1ea5t \u0111\u01b0\u1ee3c tri\u1ec3n khai. M\u1ee9c \u0111\u1ed9 n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n b\u1eb1ng\u00a0s\u01a1 \u0111\u1ed3 l\u1edbp UML<\/strong>\u00a0ho\u1eb7c s\u01a1 \u0111\u1ed3 quan h\u1ec7 th\u1ef1c th\u1ec3. M\u1eb7c d\u00f9 m\u1ee9c \u0111\u1ed9 n\u00e0y t\u1ed3n t\u1ea1i trong m\u00f4 h\u00ecnh, nh\u01b0ng th\u01b0\u1eddng b\u1ecb b\u1ecf qua v\u00ec ch\u00ednh m\u00e3 ngu\u1ed3n cung c\u1ea5p th\u00f4ng tin n\u00e0y.<\/p>\n M\u1ee9c \u0111\u1ed9 1: B\u1ed1i c\u1ea3nh h\u1ec7 th\u1ed1ng<\/strong><\/p>\n \u00a0<\/p>\n M\u1ee9c \u0111\u1ed9 2: C\u00e1c container (t\u1ed5ng quan ki\u1ebfn tr\u00fac)<\/strong><\/p>\n \u00a0<\/p>\n \u00a0<\/p>\n \u00a0<\/strong><\/p>\n M\u00f4 h\u00ecnh C4 t\u1ecf ra xu\u1ea5t s\u1eafc trong c\u00e1c t\u00ecnh hu\u1ed1ng ph\u00e1t tri\u1ec3n ph\u1ea7n m\u1ec1m hi\u1ec7n \u0111\u1ea1i:<\/p>\n C\u00e1c d\u1ef1 \u00e1n xanh (greenfield)<\/strong>: Khi thi\u1ebft k\u1ebf c\u00e1c h\u1ec7 th\u1ed1ng m\u1edbi v\u1edbi c\u00e1c l\u1edbp ki\u1ebfn tr\u00fac r\u00f5 r\u00e0ng<\/p>\n<\/li>\n Ki\u1ebfn tr\u00fac microservices<\/strong>: N\u01a1i m\u1ee9c \u0111\u1ed9 container ph\u00f9 h\u1ee3p t\u1ef1 nhi\u00ean v\u1edbi c\u00e1c d\u1ecbch v\u1ee5<\/p>\n<\/li>\n Ti\u1ebfp nh\u1eadn c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n m\u1edbi<\/strong>: Cung c\u1ea5p b\u1ea3n \u0111\u1ed3 c\u00f3 th\u1ec3 thu ph\u00f3ng cho m\u00e3 ngu\u1ed3n<\/p>\n<\/li>\n Giao ti\u1ebfp v\u1edbi c\u00e1c b\u00ean li\u00ean quan<\/strong>: S\u01a1 \u0111\u1ed3 b\u1ed1i c\u1ea3nh d\u1ec5 ti\u1ebfp c\u1eadn \u0111\u1ed1i v\u1edbi c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00f4ng chuy\u00ean v\u1ec1 k\u1ef9 thu\u1eadt<\/p>\n<\/li>\n T\u00e0i li\u1ec7u<\/strong>: C4 t\u1ea1o ra m\u1ed9t h\u1ec7 th\u1ed1ng t\u00e0i li\u1ec7u s\u1ed1ng \u0111\u1ed9ng, c\u00f3 nhi\u1ec1u l\u1edbp<\/p>\n<\/li>\n<\/ul>\n![\"\"](\"https:\/\/www.go-notes.com\/wp-content\/uploads\/2026\/07\/img_6a55ff3ee250e.png\")
<\/p>\nPh\u1ea7n 1: Ph\u00e2n t\u00edch theo chi\u1ec1u d\u1ecdc DFD<\/h2>\n
Tri\u1ebft l\u00fd c\u1ed1t l\u00f5i<\/h3>\n
K\u1ef9 thu\u1eadt ph\u00e2n t\u00edch theo chi\u1ec1u d\u1ecdc<\/h3>\n
![\"Top-Down](\"https:\/\/www.go-notes.com\/wp-content\/uploads\/2026\/07\/img_6a55e670af3ba.png\")
<\/p>\nGi\u1ea3i th\u00edch c\u00e1c c\u1ea5p \u0111\u1ed9 DFD<\/h3>\n
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Quy t\u1eafc c\u00e2n b\u1eb1ng<\/h3>\n
V\u00ed d\u1ee5 DFD: H\u1ec7 th\u1ed1ng qu\u1ea3n l\u00fd th\u01b0 vi\u1ec7n<\/h3>\n
![\"\"](\"https:\/\/www.go-notes.com\/wp-content\/uploads\/2026\/07\/img_6a55ee3980060.png\")
<\/p>\n![\"\"](\"https:\/\/www.go-notes.com\/wp-content\/uploads\/2026\/07\/img_6a55eea4edc27.png\")
<\/p>\nKhi n\u00e0o n\u00ean s\u1eed d\u1ee5ng DFD<\/h3>\n
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Ph\u1ea7n 2: M\u00f4 h\u00ecnh C4<\/h2>\n
Tri\u1ebft l\u00fd c\u1ed1t l\u00f5i<\/h3>\n
B\u1ed1n m\u1ee9c \u0111\u1ed9<\/h3>\n
![\"C4](\"https:\/\/www.go-notes.com\/wp-content\/uploads\/2026\/07\/img_6a55ea1ba80ab.png\")
<\/p>\nGi\u1ea3i th\u00edch c\u00e1c c\u1ea5p \u0111\u1ed9 C4<\/h3>\n
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V\u00ed d\u1ee5 m\u00f4 h\u00ecnh C4: H\u1ec7 th\u1ed1ng ChatGPT<\/h3>\n
![\"\"](\"https:\/\/www.go-notes.com\/wp-content\/uploads\/2026\/07\/img_6a55ed1767bad.png\")
<\/p>\n![\"\"](\"https:\/\/www.go-notes.com\/wp-content\/uploads\/2026\/07\/img_6a55ed2c13667.png\")
<\/p>\n
\n<\/strong>
\nM\u1ee9c \u0111\u1ed9 3: C\u00e1c th\u00e0nh ph\u1ea7n (b\u1ea3n ch\u1ea5t b\u00ean trong d\u1ecbch v\u1ee5 ho\u00e0n th\u00e0nh)<\/strong><\/p>\n![\"\"](\"https:\/\/www.go-notes.com\/wp-content\/uploads\/2026\/07\/img_6a55ed9c5002a.png\")
<\/p>\nKhi n\u00e0o n\u00ean s\u1eed d\u1ee5ng m\u00f4 h\u00ecnh C4<\/h3>\n
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Ph\u1ea7n 3: So s\u00e1nh tr\u1ef1c ti\u1ebfp<\/h2>\n
So s\u00e1nh kh\u00e1i ni\u1ec7m<\/h3>\n