{"id":4661,"date":"2025-07-22T17:17:32","date_gmt":"2025-07-22T10:17:32","guid":{"rendered":"https:\/\/dncloud.net\/blog\/?p=4661"},"modified":"2025-07-22T17:17:32","modified_gmt":"2025-07-22T10:17:32","slug":"network-la-gi","status":"publish","type":"post","link":"https:\/\/dncloud.net\/blog\/network-la-gi\/","title":{"rendered":"Network l\u00e0 g\u00ec? S\u1ef1 kh\u00e1c nhau gi\u1eefa Network v\u00e0 Internet"},"content":{"rendered":"

M\u1ea1ng hay Network l\u00e0 n\u1ec1n t\u1ea3ng k\u1ebft n\u1ed1i m\u1ecdi th\u1ee9 t\u1eeb con ng\u01b0\u1eddi, thi\u1ebft b\u1ecb \u0111\u1ebfn c\u00e1c h\u1ec7 th\u1ed1ng. T\u1eeb vi\u1ec7c truy c\u1eadp internet h\u00e0ng ng\u00e0y \u0111\u1ebfn k\u1ebft n\u1ed1i c\u00e1c thi\u1ebft b\u1ecb trong doanh nghi\u1ec7p, Network \u0111\u00e3 tr\u1edf th\u00e0nh y\u1ebfu t\u1ed1 kh\u00f4ng th\u1ec3 thi\u1ebfu. Nh\u01b0ng b\u1ea1n c\u00f3 th\u1ef1c s\u1ef1 hi\u1ec3u r\u00f5 Network l\u00e0 g\u00ec<\/a>, c\u1ea5u tr\u00fac c\u1ee7a n\u00f3 ra sao, v\u00e0 \u1ee9ng d\u1ee5ng nh\u01b0 th\u1ebf n\u00e0o? C\u00f9ng DNCLOUD<\/a><\/strong> t\u00ecm hi\u1ec3u ngay chi ti\u1ebft trong b\u00e0i vi\u1ebft d\u01b0\u1edbi \u0111\u00e2y.<\/p>\n

Network l\u00e0 g\u00ec?<\/h2>\n

Network (m\u1ea1ng) l\u00e0 m\u1ed9t t\u1eadp h\u1ee3p c\u00e1c thi\u1ebft b\u1ecb, ch\u1eb3ng h\u1ea1n nh\u01b0 m\u00e1y t\u00ednh, m\u00e1y ch\u1ee7<\/a><\/strong>, b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn v\u00e0 c\u00e1c thi\u1ebft b\u1ecb kh\u00e1c, \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi nhau \u0111\u1ec3 chia s\u1ebb t\u00e0i nguy\u00ean v\u00e0 trao \u0111\u1ed5i th\u00f4ng tin. C\u00e1c m\u1ea1ng n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i qua d\u00e2y c\u00e1p v\u1eadt l\u00fd ho\u1eb7c th\u00f4ng qua k\u1ebft n\u1ed1i kh\u00f4ng d\u00e2y.<\/p>\n

\"Network

Network l\u00e0 g\u00ec?<\/p><\/div>\n

M\u1ed9t m\u1ea1ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c c\u1ea5u th\u00e0nh t\u1eeb nhi\u1ec1u th\u00e0nh ph\u1ea7n kh\u00e1c nhau nh\u01b0: c\u00e1c m\u00e1y t\u00ednh c\u00e1 nh\u00e2n, m\u00e1y ch\u1ee7, thi\u1ebft b\u1ecb m\u1ea1ng (ch\u1eb3ng h\u1ea1n nh\u01b0 b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn – router, thi\u1ebft b\u1ecb chuy\u1ec3n m\u1ea1ch – switch), d\u00e2y c\u00e1p k\u1ebft n\u1ed1i, c\u00e1c giao th\u1ee9c truy\u1ec1n th\u00f4ng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o s\u1ef1 t\u01b0\u01a1ng t\u00e1c, ph\u1ea7n m\u1ec1m qu\u1ea3n tr\u1ecb m\u1ea1ng v\u00e0 c\u00e1c \u1ee9ng d\u1ee5ng h\u1ed7 tr\u1ee3 v\u1eadn h\u00e0nh.<\/p>\n

M\u1ed9t s\u1ed1 lo\u1ea1i m\u1ea1ng ph\u1ed5 bi\u1ebfn hi\u1ec7n nay bao g\u1ed3m: m\u1ea1ng c\u1ee5c b\u1ed9 (LAN – Local Area Network)<\/strong>, m\u1ea1ng di\u1ec7n r\u1ed9ng (WAN – Wide Area Network)<\/strong>, m\u1ea1ng kh\u00f4ng d\u00e2y (Wireless Network)<\/strong>, m\u1ea1ng ri\u00eang \u1ea3o (VPN – Virtual Private Network)<\/strong> v\u00e0 m\u1ea1ng Internet. \u0110\u00e2y \u0111\u1ec1u l\u00e0 nh\u1eefng th\u00e0nh ph\u1ea7n thi\u1ebft y\u1ebfu, \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c k\u1ebft n\u1ed1i c\u00e1c thi\u1ebft b\u1ecb v\u00e0 truy\u1ec1n t\u1ea3i th\u00f4ng tin trong th\u1eddi \u0111\u1ea1i c\u00f4ng ngh\u1ec7 s\u1ed1.<\/p>\n

Network c\u00f3 c\u1ea5u tr\u00fac li\u00ean k\u1ebft nh\u01b0 th\u1ebf n\u00e0o?<\/h2>\n

C\u1ea5u tr\u00fac li\u00ean k\u1ebft m\u1ea1ng (Network Topology) m\u00f4 t\u1ea3 c\u00e1ch c\u00e1c thi\u1ebft b\u1ecb trong m\u1ea1ng \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp v\u00e0 k\u1ebft n\u1ed1i v\u1edbi nhau. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 c\u1ea5u tr\u00fac li\u00ean k\u1ebft ph\u1ed5 bi\u1ebfn:<\/p>\n

C\u1ea5u tr\u00fac li\u00ean k\u1ebft h\u00ecnh sao (Star Topology):<\/strong> Trong c\u1ea5u tr\u00fac n\u00e0y, c\u00e1c thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i \u0111\u1ebfn m\u1ed9t thi\u1ebft b\u1ecb trung t\u00e2m, th\u01b0\u1eddng l\u00e0 m\u1ed9t b\u1ed9 chuy\u1ec3n m\u1ea1ch (switch) ho\u1eb7c b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn (router<\/a>). T\u1ea5t c\u1ea3 d\u1eef li\u1ec7u ph\u1ea3i \u0111i qua trung t\u00e2m tr\u01b0\u1edbc khi \u0111\u1ebfn thi\u1ebft b\u1ecb \u0111\u00edch.<\/p>\n

\"C\u1ea5u

C\u1ea5u tr\u00fac li\u00ean k\u1ebft h\u00ecnh sao (Star Topology)<\/p><\/div>\n

C\u1ea5u tr\u00fac li\u00ean k\u1ebft m\u1ea1ng v\u00f2ng (Ring Topology):<\/strong> C\u00e1c thi\u1ebft b\u1ecb trong m\u1ea1ng \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i th\u00e0nh m\u1ed9t v\u00f2ng kh\u00e9p k\u00edn, trong \u0111\u00f3 m\u1ed7i thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i tr\u1ef1c ti\u1ebfp v\u1edbi hai thi\u1ebft b\u1ecb l\u00e2n c\u1eadn. D\u1eef li\u1ec7u \u0111\u01b0\u1ee3c truy\u1ec1n \u0111i theo m\u1ed9t chi\u1ec1u c\u1ed1 \u0111\u1ecbnh (ho\u1eb7c c\u1ea3 hai chi\u1ec1u trong m\u1ea1ng v\u00f2ng k\u00e9p).<\/p>\n

\"C\u1ea5u

C\u1ea5u tr\u00fac li\u00ean k\u1ebft m\u1ea1ng v\u00f2ng (Ring Topology)<\/p><\/div>\n

C\u1ea5u tr\u00fac li\u00ean k\u1ebft m\u1ea1ng l\u01b0\u1edbi (Mesh Topology):<\/strong> \u0110\u00e2y l\u00e0 m\u1ed9t c\u1ea5u tr\u00fac li\u00ean k\u1ebft ph\u1ee9c t\u1ea1p, trong \u0111\u00f3 m\u1ed7i thi\u1ebft b\u1ecb trong m\u1ea1ng \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i tr\u1ef1c ti\u1ebfp v\u1edbi nhi\u1ec1u thi\u1ebft b\u1ecb kh\u00e1c. M\u1ea1ng l\u01b0\u1edbi c\u00f3 th\u1ec3 t\u1ed3n t\u1ea1i \u1edf hai d\u1ea1ng: Mesh \u0111\u1ea7y \u0111\u1ee7<\/strong> (Full Mesh) khi t\u1ea5t c\u1ea3 c\u00e1c thi\u1ebft b\u1ecb \u0111\u1ec1u \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i tr\u1ef1c ti\u1ebfp v\u1edbi nhau v\u00e0 Mesh m\u1ed9t ph\u1ea7n<\/strong> (Partial Mesh) khi ch\u1ec9 c\u00f3 m\u1ed9t s\u1ed1 thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i tr\u1ef1c ti\u1ebfp.<\/p>\n

\"C\u1ea5u

C\u1ea5u tr\u00fac li\u00ean k\u1ebft m\u1ea1ng l\u01b0\u1edbi (Mesh Topology)<\/p><\/div>\n

C\u1ea5u tr\u00fac li\u00ean k\u1ebft m\u1ea1ng m\u1ea1ch nhi\u1ec1u l\u1edbp (Hierarchical Topology):<\/strong> C\u1ea5u tr\u00fac li\u00ean k\u1ebft n\u00e0y t\u1ed5 ch\u1ee9c c\u00e1c thi\u1ebft b\u1ecb trong m\u1ea1ng theo c\u1ea5p b\u1eadc. L\u1edbp cao nh\u1ea5t th\u01b0\u1eddng \u0111\u00f3ng vai tr\u00f2 \u0111i\u1ec1u ph\u1ed1i v\u00e0 qu\u1ea3n l\u00fd d\u1eef li\u1ec7u, trong khi c\u00e1c l\u1edbp d\u01b0\u1edbi th\u1ef1c hi\u1ec7n truy\u1ec1n t\u1ea3i v\u00e0 x\u1eed l\u00fd d\u1eef li\u1ec7u.<\/p>\n

\"C\u1ea5u

C\u1ea5u tr\u00fac li\u00ean k\u1ebft m\u1ea1ng m\u1ea1ch nhi\u1ec1u l\u1edbp (Hierarchical Topology)<\/p><\/div>\n

Nh\u1eefng lo\u1ea1i Network ph\u1ed5 bi\u1ebfn hi\u1ec7n nay<\/h2>\n

M\u1ea1ng \u0111\u00f3ng vai tr\u00f2 trung t\u00e2m trong vi\u1ec7c k\u1ebft n\u1ed1i c\u00e1c thi\u1ebft b\u1ecb v\u00e0 con ng\u01b0\u1eddi, gi\u00fap t\u1ed1i \u01b0u h\u00f3a vi\u1ec7c trao \u0111\u1ed5i th\u00f4ng tin trong nhi\u1ec1u l\u0129nh v\u1ef1c kh\u00e1c nhau. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1c lo\u1ea1i network ph\u1ed5 bi\u1ebfn, m\u1ed7i lo\u1ea1i \u0111\u00e1p \u1ee9ng nhu c\u1ea7u s\u1eed d\u1ee5ng kh\u00e1c bi\u1ec7t v\u00e0 \u0111a d\u1ea1ng kh\u00e1c nhau cho ng\u01b0\u1eddi d\u00f9ng.<\/p>\n

Wide Area Network (WAN)<\/h3>\n

WAN l\u00e0 m\u1ea1ng di\u1ec7n r\u1ed9ng k\u1ebft n\u1ed1i c\u00e1c khu v\u1ef1c \u0111\u1ecba l\u00fd l\u1edbn nh\u01b0 gi\u1eefa c\u00e1c th\u00e0nh ph\u1ed1, qu\u1ed1c gia ho\u1eb7c th\u1eadm ch\u00ed to\u00e0n c\u1ea7u, th\u01b0\u1eddng \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng d\u1ef1a tr\u00ean c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng c\u1ee7a c\u00e1c nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 vi\u1ec5n th\u00f4ng. M\u1ea1ng n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng cho c\u00e1c doanh nghi\u1ec7p ho\u1eb7c t\u1ed5 ch\u1ee9c c\u00f3 nhi\u1ec1u chi nh\u00e1nh ph\u00e2n t\u00e1n.<\/p>\n

Global Area Networks (GAN)<\/h3>\n

GAN l\u00e0 m\u1ea1ng to\u00e0n c\u1ea7u, cho ph\u00e9p k\u1ebft n\u1ed1i kh\u00f4ng gi\u1edbi h\u1ea1n v\u1ec1 ph\u1ea1m vi th\u00f4ng qua c\u00e1c c\u00f4ng ngh\u1ec7 nh\u01b0 v\u1ec7 tinh ho\u1eb7c m\u1ea1ng di \u0111\u1ed9ng to\u00e0n c\u1ea7u. Lo\u1ea1i m\u1ea1ng n\u00e0y h\u1ed7 tr\u1ee3 c\u00e1c h\u1ec7 th\u1ed1ng qu\u1ed1c t\u1ebf ho\u1eb7c c\u00e1c \u1ee9ng d\u1ee5ng y\u00eau c\u1ea7u ph\u1ea1m vi k\u1ebft n\u1ed1i l\u1edbn.<\/p>\n

Local Area Network (LAN)<\/h3>\n

LAN l\u00e0 m\u1ea1ng c\u1ee5c b\u1ed9, k\u1ebft n\u1ed1i c\u00e1c thi\u1ebft b\u1ecb trong m\u1ed9t ph\u1ea1m vi nh\u1ecf nh\u01b0 v\u0103n ph\u00f2ng, nh\u00e0 \u1edf ho\u1eb7c tr\u01b0\u1eddng h\u1ecdc. V\u1edbi t\u1ed1c \u0111\u1ed9 cao v\u00e0 chi ph\u00ed tri\u1ec3n khai th\u1ea5p, LAN r\u1ea5t ph\u00f9 h\u1ee3p \u0111\u1ec3 qu\u1ea3n l\u00fd t\u00e0i nguy\u00ean t\u1ea1i c\u00e1c doanh nghi\u1ec7p nh\u1ecf ho\u1eb7c h\u1ed9 gia \u0111\u00ecnh.<\/p>\n

Metropolitan Area Networks (MAN)<\/h3>\n

MAN l\u00e0 m\u1ea1ng \u0111\u00f4 th\u1ecb, k\u1ebft n\u1ed1i c\u00e1c khu v\u1ef1c trong m\u1ed9t th\u00e0nh ph\u1ed1 b\u1eb1ng c\u00e1c c\u00f4ng ngh\u1ec7 nh\u01b0 c\u00e1p quang ho\u1eb7c m\u1ea1ng kh\u00f4ng d\u00e2y. M\u1ea1ng n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng trong l\u0129nh v\u1ef1c gi\u00e1o d\u1ee5c, giao th\u00f4ng ho\u1eb7c c\u00e1c h\u1ec7 th\u1ed1ng qu\u1ea3n l\u00fd \u0111\u00f4 th\u1ecb.<\/p>\n

Personal Area Networks (PAN)<\/h3>\n

PAN l\u00e0 m\u1ea1ng c\u00e1 nh\u00e2n, k\u1ebft n\u1ed1i c\u00e1c thi\u1ebft b\u1ecb trong ph\u1ea1m vi nh\u1ecf nh\u01b0 xung quanh m\u1ed9t c\u00e1 nh\u00e2n, th\u01b0\u1eddng kh\u00f4ng qu\u00e1 10 m\u00e9t. M\u1ea1ng n\u00e0y l\u00fd t\u01b0\u1edfng cho vi\u1ec7c k\u1ebft n\u1ed1i c\u00e1c thi\u1ebft b\u1ecb nh\u01b0 \u0111i\u1ec7n tho\u1ea1i, laptop, ho\u1eb7c thi\u1ebft b\u1ecb \u0111eo th\u00f4ng minh.<\/p>\n

Xem th\u00eam: \u0110\u1ecba ch\u1ec9 IP l\u00e0 g\u00ec? T\u1ed5ng h\u1ee3p ki\u1ebfn th\u1ee9c v\u1ec1 \u0111\u1ecba ch\u1ec9 IP<\/a><\/strong><\/em><\/p>\n

\u1ee8ng d\u1ee5ng c\u1ee7a Network l\u00e0 g\u00ec?<\/h2>\n

M\u1ea1ng\u00a0 kh\u00f4ng ch\u1ec9 k\u1ebft n\u1ed1i c\u00e1c thi\u1ebft b\u1ecb m\u00e0 c\u00f2n mang l\u1ea1i nh\u1eefng \u1ee9ng d\u1ee5ng thi\u1ebft th\u1ef1c trong nhi\u1ec1u l\u0129nh v\u1ef1c. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 nh\u1eefng \u1ee9ng d\u1ee5ng n\u1ed5i b\u1eadt m\u00e0 network mang l\u1ea1i:<\/p>\n

Gi\u00fap chia s\u1ebb t\u00e0i nguy\u00ean v\u00e0 th\u00f4ng tin<\/h3>\n

M\u1ed9t trong nh\u1eefng \u1ee9ng d\u1ee5ng c\u01a1 b\u1ea3n nh\u1ea5t c\u1ee7a network l\u00e0 kh\u1ea3 n\u0103ng chia s\u1ebb t\u00e0i nguy\u00ean v\u00e0 th\u00f4ng tin gi\u1eefa c\u00e1c thi\u1ebft b\u1ecb. \u0110i\u1ec1u n\u00e0y cho ph\u00e9p ng\u01b0\u1eddi d\u00f9ng chia s\u1ebb c\u00e1c t\u00e0i nguy\u00ean nh\u01b0 m\u00e1y in, \u1ed5 c\u1ee9ng, ph\u1ea7n m\u1ec1m hay th\u1eadm ch\u00ed c\u00e1c d\u1eef li\u1ec7u, gi\u00fap ti\u1ebft ki\u1ec7m chi ph\u00ed v\u00e0 t\u1ed1i \u01b0u h\u00f3a vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c thi\u1ebft b\u1ecb trong m\u00f4i tr\u01b0\u1eddng c\u00f4ng s\u1edf ho\u1eb7c gia \u0111\u00ecnh.<\/p>\n

Vi\u1ec7c chia s\u1ebb t\u00e0i nguy\u00ean n\u00e0y \u0111\u1eb7c bi\u1ec7t h\u1eefu \u00edch trong c\u00e1c t\u1ed5 ch\u1ee9c, n\u01a1i nhi\u1ec1u ng\u01b0\u1eddi d\u00f9ng c\u1ea7n truy c\u1eadp v\u00e0 s\u1eed d\u1ee5ng chung c\u00e1c thi\u1ebft b\u1ecb, ph\u1ea7n m\u1ec1m ho\u1eb7c c\u01a1 s\u1edf d\u1eef li\u1ec7u m\u00e0 kh\u00f4ng c\u1ea7n \u0111\u1ea7u t\u01b0 ri\u00eang bi\u1ec7t cho m\u1ed7i c\u00e1 nh\u00e2n. M\u1ea1ng c\u0169ng cho ph\u00e9p vi\u1ec7c trao \u0111\u1ed5i th\u00f4ng tin gi\u1eefa c\u00e1c thi\u1ebft b\u1ecb kh\u00e1c nhau tr\u1edf n\u00ean nhanh ch\u00f3ng v\u00e0 d\u1ec5 d\u00e0ng h\u01a1n bao gi\u1edd h\u1ebft.<\/p>\n

Truy xu\u1ea5t th\u00f4ng tin t\u1eeb xa \u0111\u01a1n gi\u1ea3n, d\u1ec5 d\u00e0ng<\/h3>\n

M\u1ed9t trong nh\u1eefng t\u00ednh n\u0103ng quan tr\u1ecdng c\u1ee7a network l\u00e0 kh\u1ea3 n\u0103ng truy xu\u1ea5t v\u00e0 truy c\u1eadp th\u00f4ng tin t\u1eeb xa. D\u00f9 b\u1ea1n \u0111ang \u1edf v\u0103n ph\u00f2ng, t\u1ea1i nh\u00e0, hay di chuy\u1ec3n, ch\u1ec9 c\u1ea7n c\u00f3 k\u1ebft n\u1ed1i m\u1ea1ng, b\u1ea1n c\u00f3 th\u1ec3 truy c\u1eadp v\u00e0o t\u00e0i nguy\u00ean v\u00e0 d\u1eef li\u1ec7u c\u1ea7n thi\u1ebft m\u00e0 kh\u00f4ng g\u1eb7p ph\u1ea3i b\u1ea5t k\u1ef3 tr\u1edf ng\u1ea1i n\u00e0o.<\/p>\n

\u0110i\u1ec1u n\u00e0y kh\u00f4ng ch\u1ec9 h\u1eefu \u00edch \u0111\u1ed1i v\u1edbi nh\u00e2n vi\u00ean l\u00e0m vi\u1ec7c t\u1eeb xa m\u00e0 c\u00f2n gi\u00fap c\u00e1c t\u1ed5 ch\u1ee9c h\u1ed7 tr\u1ee3 kh\u00e1ch h\u00e0ng ho\u1eb7c \u0111\u1ed1i t\u00e1c m\u1ed9t c\u00e1ch linh ho\u1ea1t, nhanh ch\u00f3ng. H\u1ec7 th\u1ed1ng m\u1ea1ng c\u00f2n h\u1ed7 tr\u1ee3 nhi\u1ec1u \u1ee9ng d\u1ee5ng nh\u01b0 ph\u1ea7n m\u1ec1m \u0111\u00e1m m\u00e2y (cloud computing), gi\u00fap ng\u01b0\u1eddi d\u00f9ng truy c\u1eadp v\u00e0 chia s\u1ebb d\u1eef li\u1ec7u m\u1ecdi l\u00fac, m\u1ecdi n\u01a1i, t\u1eeb b\u1ea5t k\u1ef3 thi\u1ebft b\u1ecb n\u00e0o c\u00f3 k\u1ebft n\u1ed1i internet.<\/p>\n

Gi\u00fap t\u0103ng \u0111\u1ed9 tin c\u1eady v\u00e0 an to\u00e0n th\u00f4ng tin<\/h3>\n

M\u1ea1ng gi\u00fap t\u0103ng c\u01b0\u1eddng \u0111\u1ed9 tin c\u1eady v\u00e0 b\u1ea3o m\u1eadt cho c\u00e1c th\u00f4ng tin quan tr\u1ecdng trong c\u00e1c t\u1ed5 ch\u1ee9c. V\u1edbi kh\u1ea3 n\u0103ng l\u01b0u tr\u1eef t\u1eadp trung, c\u00e1c d\u1eef li\u1ec7u c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c sao l\u01b0u t\u1ef1 \u0111\u1ed9ng, gi\u1ea3m thi\u1ec3u kh\u1ea3 n\u0103ng m\u1ea5t m\u00e1t th\u00f4ng tin quan tr\u1ecdng trong c\u00e1c tr\u01b0\u1eddng h\u1ee3p thi\u00ean tai ho\u1eb7c s\u1ef1 c\u1ed1 h\u1ec7 th\u1ed1ng.<\/p>\n

B\u00ean c\u1ea1nh \u0111\u00f3, h\u1ec7 th\u1ed1ng m\u1ea1ng c\u00f3 th\u1ec3 t\u00edch h\u1ee3p c\u00e1c c\u01a1 ch\u1ebf b\u1ea3o m\u1eadt m\u1ea1nh m\u1ebd nh\u01b0 m\u00e3 h\u00f3a d\u1eef li\u1ec7u, t\u01b0\u1eddng l\u1eeda<\/a> v\u00e0 c\u00e1c bi\u1ec7n ph\u00e1p ch\u1ed1ng x\u00e2m nh\u1eadp gi\u00fap b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u kh\u1ecfi c\u00e1c m\u1ed1i \u0111e d\u1ecda t\u1eeb b\u00ean ngo\u00e0i. C\u00e1c m\u1ea1ng VPN (Virtual Private Network) c\u0169ng h\u1ed7 tr\u1ee3 b\u1ea3o m\u1eadt khi ng\u01b0\u1eddi d\u00f9ng truy c\u1eadp t\u1eeb xa, gi\u00fap \u0111\u1ea3m b\u1ea3o an to\u00e0n cho th\u00f4ng tin trong qu\u00e1 tr\u00ecnh truy\u1ec1n t\u1ea3i qua internet c\u00f4ng c\u1ed9ng.<\/p>\n

Gi\u00fap giao ti\u1ebfp gi\u1eefa c\u00e1c c\u00e1 nh\u00e2n thu\u1eadn ti\u1ec7n<\/h3>\n

M\u1ea1ng c\u0169ng cung c\u1ea5p n\u1ec1n t\u1ea3ng \u0111\u1ec3 c\u00e1c c\u00e1 nh\u00e2n d\u1ec5 d\u00e0ng giao ti\u1ebfp v\u00e0 t\u01b0\u01a1ng t\u00e1c v\u1edbi nhau. Nh\u1edd c\u00f3 c\u00e1c \u1ee9ng d\u1ee5ng giao ti\u1ebfp nh\u01b0 email, tin nh\u1eafn t\u1ee9c th\u00ec (IM), h\u1ed9i ngh\u1ecb video tr\u1ef1c tuy\u1ebfn, v\u00e0 c\u00e1c n\u1ec1n t\u1ea3ng m\u1ea1ng x\u00e3 h\u1ed9i, c\u00e1c c\u00e1 nh\u00e2n c\u00f3 th\u1ec3 li\u00ean l\u1ea1c v\u00e0 chia s\u1ebb th\u00f4ng tin m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 h\u01a1n, b\u1ea5t k\u1ec3 h\u1ecd \u1edf \u0111\u00e2u tr\u00ean th\u1ebf gi\u1edbi.<\/p>\n

\u0110i\u1ec1u n\u00e0y l\u00e0m cho vi\u1ec7c h\u1ee3p t\u00e1c v\u00e0 l\u00e0m vi\u1ec7c nh\u00f3m tr\u1edf n\u00ean thu\u1eadn ti\u1ec7n v\u00e0 linh ho\u1ea1t h\u01a1n, gi\u1ea3m thi\u1ec3u th\u1eddi gian v\u00e0 chi ph\u00ed li\u00ean l\u1ea1c. C\u00e1c c\u00f4ng c\u1ee5 giao ti\u1ebfp n\u00e0y kh\u00f4ng ch\u1ec9 gi\u00fap ti\u1ebft ki\u1ec7m th\u1eddi gian m\u00e0 c\u00f2n th\u00fac \u0111\u1ea9y s\u1ef1 h\u1ee3p t\u00e1c gi\u1eefa c\u00e1c \u0111\u1ed9i nh\u00f3m v\u00e0 t\u1ea1o ra m\u00f4i tr\u01b0\u1eddng l\u00e0m vi\u1ec7c n\u0103ng \u0111\u1ed9ng v\u00e0 hi\u1ec7u qu\u1ea3.<\/p>\n

Network c\u00f3 \u01b0u v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m g\u00ec?<\/h2>\n

\"\"<\/p>\n

Gi\u1ed1ng nh\u01b0 b\u1ea5t k\u1ef3 c\u00f4ng ngh\u1ec7 n\u00e0o kh\u00e1c, network c\u0169ng c\u00f3 nh\u1eefng \u01b0u \u0111i\u1ec3m v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m ri\u00eang bi\u1ec7t. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t c\u00e1i nh\u00ecn t\u1ed5ng quan v\u1ec1 c\u00e1c \u01b0u v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a network:<\/p>\n

\u01afu \u0111i\u1ec3m c\u1ee7a network<\/h3>\n