{"id":476477,"date":"2023-08-09T07:29:55","date_gmt":"2023-08-09T07:29:55","guid":{"rendered":""},"modified":"2023-09-05T11:12:51","modified_gmt":"2023-09-05T11:12:51","slug":"crossover-cable","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/vn\/wiki\/crossover-cable\/","title":{"rendered":"C\u00e1p n\u1ed1i ch\u00e9o"},"content":{"rendered":"

C\u00e1p ch\u00e9o d\u00f9ng \u0111\u1ec3 ch\u1ec9 c\u00e1p Ethernet \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 k\u1ebft n\u1ed1i tr\u1ef1c ti\u1ebfp c\u00e1c thi\u1ebft b\u1ecb m\u00e1y t\u00ednh v\u1edbi nhau. Ng\u01b0\u1ee3c l\u1ea1i v\u1edbi c\u00e1p v\u00e1 ti\u00eau chu\u1ea9n ho\u1eb7c c\u00e1p xuy\u00ean th\u1eb3ng, k\u1ebft n\u1ed1i c\u00e1c lo\u1ea1i thi\u1ebft b\u1ecb kh\u00e1c nhau (v\u00ed d\u1ee5: m\u00e1y t\u00ednh v\u1edbi b\u1ed9 chuy\u1ec3n m\u1ea1ch m\u1ea1ng ho\u1eb7c b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn), c\u00e1p ch\u00e9o k\u1ebft n\u1ed1i c\u00e1c thi\u1ebft b\u1ecb c\u00f9ng lo\u1ea1i, ch\u1eb3ng h\u1ea1n nh\u01b0 PC-to-PC, b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn -to-router, ho\u1eb7c switch-to-switch. \u0110i\u1ec1u n\u00e0y \u0111\u1ea1t \u0111\u01b0\u1ee3c b\u1eb1ng c\u00e1ch \u0111\u1ea3o ng\u01b0\u1ee3c (ho\u1eb7c 'ngang qua') \u0111\u01b0\u1eddng truy\u1ec1n v\u00e0 \u0111\u01b0\u1eddng thu trong \u0111\u1ea7u n\u1ed1i RJ-45, do \u0111\u00f3 c\u00f3 t\u00ean nh\u01b0 v\u1eady.<\/p>\n

Ngu\u1ed3n g\u1ed1c v\u00e0 l\u1ecbch s\u1eed c\u1ee7a c\u00e1p ch\u00e9o<\/h2>\n

C\u00e1p ch\u00e9o c\u00f3 ngu\u1ed3n g\u1ed1c t\u1eeb cu\u1ed1i nh\u1eefng n\u0103m 1970 v\u00e0 \u0111\u1ea7u nh\u1eefng n\u0103m 1980, sau s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a c\u00f4ng ngh\u1ec7 Ethernet. Ethernet, ban \u0111\u1ea7u \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n b\u1edfi Xerox PARC, \u0111\u00e3 tr\u1edf th\u00e0nh ti\u00eau chu\u1ea9n cho m\u1ea1ng c\u1ee5c b\u1ed9 (LAN), \u0111\u00f2i h\u1ecfi c\u00e1c ph\u01b0\u01a1ng ph\u00e1p m\u1edbi \u0111\u1ec3 li\u00ean k\u1ebft c\u00e1c thi\u1ebft b\u1ecb t\u01b0\u01a1ng t\u1ef1 m\u00e0 kh\u00f4ng c\u1ea7n s\u1eed d\u1ee5ng hub ho\u1eb7c b\u1ed9 chuy\u1ec3n m\u1ea1ch.<\/p>\n

L\u1ea7n \u0111\u1ea7u ti\u00ean \u0111\u1ec1 c\u1eadp \u0111\u1ebfn c\u00e1p ch\u00e9o trong b\u1ed1i c\u1ea3nh n\u00e0y l\u00e0 v\u00e0o cu\u1ed1i nh\u1eefng n\u0103m 1980 khi c\u00f4ng ngh\u1ec7 Ethernet b\u1eaft \u0111\u1ea7u \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng r\u1ed9ng r\u00e3i cho m\u1ee5c \u0111\u00edch th\u01b0\u01a1ng m\u1ea1i v\u00e0 c\u00e1 nh\u00e2n. Khi c\u00e1c thi\u1ebft b\u1ecb m\u1ea1ng b\u1eaft \u0111\u1ea7u ph\u00e1t tri\u1ec3n, nhu c\u1ea7u v\u1ec1 c\u00e1p c\u00f3 th\u1ec3 li\u00ean k\u1ebft tr\u1ef1c ti\u1ebfp hai thi\u1ebft b\u1ecb t\u01b0\u01a1ng t\u1ef1 nhau c\u0169ng t\u0103ng theo, d\u1eabn \u0111\u1ebfn s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a c\u00e1p ch\u00e9o.<\/p>\n

\u0110i s\u00e2u v\u00e0o c\u00e1p ch\u00e9o<\/h2>\n

V\u1ec1 c\u01a1 b\u1ea3n, c\u00e1p ch\u00e9o l\u1ea5y \u0111\u1ea7u ra c\u1ee7a m\u1ed9t thi\u1ebft b\u1ecb v\u00e0 c\u1eafm n\u00f3 v\u00e0o \u0111\u1ea7u v\u00e0o c\u1ee7a thi\u1ebft b\u1ecb kh\u00e1c. \u0110i\u1ec1u n\u00e0y cho ph\u00e9p hai thi\u1ebft b\u1ecb t\u01b0\u01a1ng t\u1ef1 giao ti\u1ebfp m\u00e0 kh\u00f4ng c\u1ea7n trung t\u00e2m m\u1ea1ng ho\u1eb7c b\u1ed9 chuy\u1ec3n m\u1ea1ch. S\u1ef1 kh\u00e1c bi\u1ec7t c\u1ee7a n\u00f3 v\u1edbi c\u00e1p Ethernet ti\u00eau chu\u1ea9n n\u1eb1m \u1edf c\u1ea5u h\u00ecnh n\u1ed1i d\u00e2y b\u00ean trong.<\/p>\n

C\u00e1p Ethernet \u0111\u01b0\u1ee3c \u0111\u1eb7c tr\u01b0ng b\u1edfi m\u1ed9t s\u1ed1 c\u1eb7p d\u00e2y, m\u1ed7i c\u1eb7p ph\u1ee5c v\u1ee5 m\u1ed9t m\u1ee5c \u0111\u00edch c\u1ee5 th\u1ec3 cho vi\u1ec7c truy\u1ec1n v\u00e0 nh\u1eadn d\u1eef li\u1ec7u. Trong c\u00e1p Ethernet ti\u00eau chu\u1ea9n, c\u00e1c c\u1eb7p n\u00e0y kh\u1edbp th\u1eb3ng t\u1eeb \u0111\u1ea7u n\u00e0y sang \u0111\u1ea7u kia, k\u1ebft n\u1ed1i c\u00e1c s\u1ed1 ch\u00e2n gi\u1ed1ng h\u1ec7t nhau tr\u00ean m\u1ed7i ph\u00edch c\u1eafm.<\/p>\n

Tuy nhi\u00ean, c\u00e1p ch\u00e9o kh\u00f4ng tu\u00e2n theo s\u01a1 \u0111\u1ed3 k\u1ebft h\u1ee3p n\u00e0y. Thay v\u00e0o \u0111\u00f3, c\u00e1c c\u1eb7p truy\u1ec1n v\u00e0 nh\u1eadn \u0111\u01b0\u1ee3c 'b\u1eaft ch\u00e9o' gi\u1eefa c\u00e1c \u0111\u1ea7u n\u1ed1i, cho ph\u00e9p d\u1eef li\u1ec7u \u0111\u1ea7u ra t\u1eeb m\u1ed9t thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c nh\u1eadn ch\u00ednh x\u00e1c l\u00e0m \u0111\u1ea7u v\u00e0o c\u1ee7a thi\u1ebft b\u1ecb kia.<\/p>\n

C\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a c\u00e1p ch\u00e9o v\u00e0 c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a n\u00f3<\/h2>\n

C\u00e1p ch\u00e9o s\u1eed d\u1ee5ng ti\u00eau chu\u1ea9n T568A v\u00e0 T568B \u0111\u1ec3 \u0111i qua h\u1ec7 th\u1ed1ng d\u00e2y \u0111i\u1ec7n b\u00ean trong. Ti\u00eau chu\u1ea9n T568B ph\u1ed5 bi\u1ebfn h\u01a1n \u1edf M\u1ef9, trong khi T568A ph\u1ed5 bi\u1ebfn \u1edf Ch\u00e2u \u00c2u v\u00e0 c\u00e1c n\u01a1i kh\u00e1c tr\u00ean th\u1ebf gi\u1edbi. S\u1ef1 kh\u00e1c bi\u1ec7t n\u1eb1m \u1edf th\u1ee9 t\u1ef1 c\u00e1c d\u00e2y \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a m\u00e0u b\u00ean trong c\u00e1p Ethernet.<\/p>\n

C\u00e1p ch\u00e9o \u0111\u01b0\u1ee3c n\u1ed1i d\u00e2y theo ti\u00eau chu\u1ea9n T568A \u1edf m\u1ed9t \u0111\u1ea7u v\u00e0 ti\u00eau chu\u1ea9n T568B \u1edf \u0111\u1ea7u kia \u0111i qua c\u1eb7p d\u00e2y m\u00e0u xanh l\u00e1 c\u00e2y v\u00e0 m\u00e0u cam, 'v\u01b0\u1ee3t qua' \u0111\u01b0\u1eddng truy\u1ec1n v\u00e0 \u0111\u01b0\u1eddng thu m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3.<\/p>\n

\u0110\u00e2y l\u00e0 c\u1ea5u h\u00ecnh n\u1ed1i d\u00e2y:<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n
Ghim T568A<\/th>\nCh\u00e2n T568B<\/th>\n<\/tr>\n<\/thead>\n
1. Xanh-Tr\u1eafng<\/td>\n1. Cam-Tr\u1eafng<\/td>\n<\/tr>\n
2. M\u00e0u xanh l\u00e1 c\u00e2y<\/td>\n2. Cam<\/td>\n<\/tr>\n
3. Cam-Tr\u1eafng<\/td>\n3. Xanh-Tr\u1eafng<\/td>\n<\/tr>\n
4. M\u00e0u xanh<\/td>\n4. M\u00e0u xanh<\/td>\n<\/tr>\n
5. Xanh-Tr\u1eafng<\/td>\n5. Xanh-Tr\u1eafng<\/td>\n<\/tr>\n
6. Cam<\/td>\n6. M\u00e0u xanh l\u00e1 c\u00e2y<\/td>\n<\/tr>\n
7. N\u00e2u-Tr\u1eafng<\/td>\n7. N\u00e2u-Tr\u1eafng<\/td>\n<\/tr>\n
8. N\u00e2u<\/td>\n8. N\u00e2u<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

C\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a c\u00e1p ch\u00e9o<\/h2>\n
    \n
  1. K\u1ebft n\u1ed1i tr\u1ef1c ti\u1ebfp: C\u00e1p ch\u00e9o cho ph\u00e9p k\u1ebft n\u1ed1i tr\u1ef1c ti\u1ebfp, ngang h\u00e0ng gi\u1eefa c\u00e1c thi\u1ebft b\u1ecb m\u1ea1ng t\u01b0\u01a1ng t\u1ef1.<\/li>\n
  2. C\u00e1ch s\u1eed d\u1ee5ng c\u00f3 th\u1ec3 ho\u00e1n \u0111\u1ed5i cho nhau: Ch\u00fang c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng thay cho c\u00e1p Ethernet truy\u1ec1n th\u1ed1ng v\u1edbi vi\u1ec7c b\u1ed5 sung c\u00e1c b\u1ed9 \u0111i\u1ec1u h\u1ee3p ch\u00e9o.<\/li>\n
  3. T\u1ed1c \u0111\u1ed9 v\u00e0 hi\u1ec7u qu\u1ea3: Ch\u00fang cung c\u1ea5p kh\u1ea3 n\u0103ng truy\u1ec1n d\u1eef li\u1ec7u nhanh ch\u00f3ng v\u00e0 hi\u1ec7u qu\u1ea3 v\u00ec ch\u00fang lo\u1ea1i b\u1ecf nhu c\u1ea7u s\u1eed d\u1ee5ng c\u00e1c thi\u1ebft b\u1ecb m\u1ea1ng \u0111\u1ec3 l\u00e0m trung gian k\u1ebft n\u1ed1i.<\/li>\n
  4. Kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch r\u1ed9ng: C\u00e1p ch\u00e9o t\u01b0\u01a1ng th\u00edch v\u1edbi h\u1ea7u h\u1ebft c\u00e1c ti\u00eau chu\u1ea9n Ethernet bao g\u1ed3m 10BaseT, 100BaseTX, 1000BaseT v\u00e0 10GBaseT.<\/li>\n<\/ol>\n

    C\u00e1c lo\u1ea1i c\u00e1p ch\u00e9o<\/h2>\n

    Nh\u00ecn chung c\u00f3 hai lo\u1ea1i c\u00e1p ch\u00e9o: c\u00e1p ch\u00e9o Ethernet v\u00e0 c\u00e1p ch\u00e9o modem null.<\/p>\n

      \n
    1. \n

      C\u00e1p ch\u00e9o Ethernet: C\u00e1c c\u00e1p n\u00e0y \u0111i qua ch\u00e2n 1&2 v\u00e0 3&6 trong \u0111\u1ea7u n\u1ed1i RJ45. Ch\u00fang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 k\u1ebft n\u1ed1i hai m\u00e1y t\u00ednh ho\u1eb7c hai b\u1ed9 chuy\u1ec3n m\u1ea1ch m\u00e0 kh\u00f4ng c\u1ea7n b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn.<\/p>\n<\/li>\n

    2. \n

      C\u00e1p ch\u00e9o Modem Null: C\u00e1c lo\u1ea1i c\u00e1p n\u00e0y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 li\u00ean l\u1ea1c n\u1ed1i ti\u1ebfp, \u0111i qua \u0111\u01b0\u1eddng truy\u1ec1n v\u00e0 nh\u1eadn. Ch\u00fang th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c thi\u1ebft l\u1eadp truy\u1ec1n th\u00f4ng d\u1eef li\u1ec7u c\u0169 h\u01a1n.<\/p>\n<\/li>\n<\/ol>\n

      S\u1eed d\u1ee5ng c\u00e1p ch\u00e9o: C\u00e1c v\u1ea5n \u0111\u1ec1 th\u01b0\u1eddng g\u1eb7p v\u00e0 gi\u1ea3i ph\u00e1p<\/h2>\n

      B\u1ea5t ch\u1ea5p t\u00ednh h\u1eefu \u00edch c\u1ee7a c\u00e1p ch\u00e9o, \u1ee9ng d\u1ee5ng c\u1ee7a ch\u00fang \u0111\u00e3 gi\u1ea3m d\u1ea7n theo th\u1eddi gian do s\u1ef1 ra \u0111\u1eddi c\u1ee7a auto-MDIX (Media Dependent Interface Crossover), m\u1ed9t c\u00f4ng ngh\u1ec7 t\u1ef1 \u0111\u1ed9ng ph\u00e1t hi\u1ec7n lo\u1ea1i k\u1ebft n\u1ed1i c\u00e1p c\u1ea7n thi\u1ebft (th\u1eb3ng ho\u1eb7c ch\u00e9o) v\u00e0 \u0111\u1ecbnh c\u1ea5u h\u00ecnh t\u00edn hi\u1ec7u m\u1ed9t c\u00e1ch th\u00edch h\u1ee3p. .<\/p>\n

      M\u1ed9t v\u1ea5n \u0111\u1ec1 ph\u1ed5 bi\u1ebfn ph\u00e1t sinh khi s\u1eed d\u1ee5ng c\u00e1p ch\u00e9o l\u00e0 vi\u1ec7c ph\u00e1t hi\u1ec7n lo\u1ea1i c\u00e1p kh\u00f4ng \u0111\u00fang, \u0111\u1eb7c bi\u1ec7t l\u00e0 v\u1edbi c\u00e1c thi\u1ebft b\u1ecb c\u0169. \u0110i\u1ec1u n\u00e0y th\u01b0\u1eddng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c gi\u1ea3i quy\u1ebft b\u1eb1ng c\u00e1ch c\u00e0i \u0111\u1eb7t th\u1ee7 c\u00f4ng c\u00e1c thi\u1ebft b\u1ecb \u0111\u1ec3 s\u1eed d\u1ee5ng s\u01a1 \u0111\u1ed3 ch\u00e9o.<\/p>\n

      C\u00e1p ch\u00e9o so v\u1edbi c\u00e1c lo\u1ea1i c\u00e1p kh\u00e1c<\/h2>\n\n\n\n\n\n\n\n
      Lo\u1ea1i c\u00e1p<\/th>\nK\u1ebft n\u1ed1i<\/th>\n\u0110\u1ea3o ng\u01b0\u1ee3c<\/th>\nTr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng<\/th>\n<\/tr>\n<\/thead>\n
      \u0110i th\u1eb3ng<\/td>\nC\u00e1c thi\u1ebft b\u1ecb kh\u00e1c nhau<\/td>\nKH\u00d4NG<\/td>\nK\u1ebft n\u1ed1i PC v\u1edbi b\u1ed9 chuy\u1ec3n m\u1ea1ch, b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn ho\u1eb7c hub<\/td>\n<\/tr>\n
      ch\u00e9o<\/td>\nThi\u1ebft b\u1ecb gi\u1ed1ng nhau<\/td>\n\u0110\u00fang<\/td>\nK\u1ebft n\u1ed1i hai PC, hai b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn ho\u1eb7c hai b\u1ed9 chuy\u1ec3n m\u1ea1ch<\/td>\n<\/tr>\n
      Chuy\u1ec3n kho\u1ea3n<\/td>\nC\u00e1c thi\u1ebft b\u1ecb kh\u00e1c nhau<\/td>\n\u0110\u1ea7y<\/td>\nK\u1ebft n\u1ed1i thi\u1ebft b\u1ecb \u0111\u1ea7u cu\u1ed1i m\u00e1y t\u00ednh v\u1edbi c\u1ed5ng b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n c\u1ee7a b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      Vi\u1ec5n c\u1ea3nh t\u01b0\u01a1ng lai v\u00e0 c\u00e1c c\u00f4ng ngh\u1ec7 li\u00ean quan<\/h2>\n

      T\u01b0\u01a1ng lai c\u1ee7a c\u00f4ng ngh\u1ec7 m\u1ea1ng nghi\u00eang v\u1ec1 truy\u1ec1n th\u00f4ng kh\u00f4ng d\u00e2y, \u0111i\u1ec1u n\u00e0y v\u1ed1n \u0111\u00e3 ph\u1ee7 nh\u1eadn nhu c\u1ea7u v\u1ec1 c\u00e1p ch\u00e9o. Tuy nhi\u00ean, trong c\u00e1c t\u00ecnh hu\u1ed1ng m\u00e0 k\u1ebft n\u1ed1i c\u00f3 d\u00e2y mang l\u1ea1i l\u1ee3i th\u1ebf v\u1ec1 \u0111\u1ed9 tr\u1ec5, b\u1ea3o m\u1eadt ho\u1eb7c c\u01b0\u1eddng \u0111\u1ed9 t\u00edn hi\u1ec7u, c\u00e1p ch\u00e9o v\u1eabn c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng.<\/p>\n

      Ngo\u00e0i ra, v\u1edbi s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a IoT v\u00e0 \u0111i\u1ec7n to\u00e1n ranh gi\u1edbi, c\u00e1p ch\u00e9o c\u00f3 th\u1ec3 c\u00f3 vai tr\u00f2 m\u1edbi trong giao ti\u1ebfp tr\u1ef1c ti\u1ebfp gi\u1eefa thi\u1ebft b\u1ecb v\u1edbi thi\u1ebft b\u1ecb.<\/p>\n

      M\u00e1y ch\u1ee7 proxy v\u00e0 c\u00e1p ch\u00e9o<\/h2>\n

      Trong b\u1ed1i c\u1ea3nh m\u00e1y ch\u1ee7 proxy, c\u00e1p ch\u00e9o c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 k\u1ebft n\u1ed1i tr\u1ef1c ti\u1ebfp hai m\u00e1y ch\u1ee7 proxy m\u00e0 kh\u00f4ng c\u1ea7n \u0111\u1ebfn thi\u1ebft b\u1ecb m\u1ea1ng. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 h\u1eefu \u00edch trong vi\u1ec7c t\u1ea1o d\u1ef1 ph\u00f2ng ho\u1eb7c t\u0103ng t\u1ed1c \u0111\u1ed9 k\u1ebft n\u1ed1i gi\u1eefa hai m\u00e1y ch\u1ee7. C\u1ea7n l\u01b0u \u00fd r\u1eb1ng c\u00e1c thi\u1ebft b\u1ecb v\u00e0 ph\u1ea7n m\u1ec1m m\u1ea1ng hi\u1ec7n \u0111\u1ea1i th\u01b0\u1eddng t\u1ef1 \u0111\u1ed9ng h\u00f3a c\u00e1c quy tr\u00ecnh n\u00e0y, gi\u1ea3m thi\u1ec3u nhu c\u1ea7u chuy\u1ec3n m\u1ea1ch v\u1eadt l\u00fd.<\/p>\n

      Li\u00ean k\u1ebft li\u00ean quan<\/h2>\n

      \u0110\u1ec3 bi\u1ebft th\u00eam th\u00f4ng tin v\u1ec1 c\u00e1p ch\u00e9o, h\u00e3y xem x\u00e9t c\u00e1c t\u00e0i nguy\u00ean sau:<\/p>\n

        \n
      1. Gi\u1ea3i th\u00edch v\u1ec1 c\u00e1p ch\u00e9o Ethernet<\/a><\/li>\n
      2. Hi\u1ec7p h\u1ed9i ti\u00eau chu\u1ea9n IEEE<\/a><\/li>\n
      3. Gi\u1edbi thi\u1ec7u c\u1ee7a Cisco v\u1ec1 c\u00e1p ch\u00e9o v\u00e0 c\u00e1p xuy\u00ean th\u1eb3ng<\/a><\/li>\n<\/ol>\n

        Ki\u1ebfn th\u1ee9c v\u1ec1 c\u00e1p ch\u00e9o l\u00e0 c\u1ea7n thi\u1ebft cho b\u1ea5t k\u1ef3 ai mu\u1ed1n t\u00ecm hi\u1ec3u l\u1edbp v\u1eadt l\u00fd c\u1ee7a m\u1ea1ng m\u00e1y t\u00ednh. Th\u00e0nh ph\u1ea7n th\u01b0\u1eddng b\u1ecb \u0111\u00e1nh gi\u00e1 th\u1ea5p n\u00e0y \u0111\u00e3 c\u00f3 m\u1ed9t vai tr\u00f2 quan tr\u1ecdng trong s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a th\u1ebf gi\u1edbi k\u1ebft n\u1ed1i ng\u00e0y nay v\u00e0 ti\u1ebfp t\u1ee5c \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong m\u1ed9t s\u1ed1 t\u00ecnh hu\u1ed1ng m\u1ea1ng nh\u1ea5t \u0111\u1ecbnh.<\/p>","protected":false},"featured_media":476478,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-476477","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about Crossover Cable: The Connection Powerhouse in Network Engineering<\/mark>","faq_items":[{"question":"What is a Crossover Cable?","answer":"

        A crossover cable is an Ethernet cable used to connect computing devices together directly. Unlike standard Ethernet cables that connect different types of devices, a crossover cable connects devices of the same type by reversing the transmission and reception lines in the RJ-45 connectors.<\/p>"},{"question":"When was the Crossover Cable first used?","answer":"

        The crossover cable found its origin in the late 1970s and early 1980s, following the rise of Ethernet technology. The first mention of a crossover cable in this context comes from the late 1980s when Ethernet technology started being widely adopted for commercial and personal use.<\/p>"},{"question":"How does a Crossover Cable work?","answer":"

        A crossover cable takes the output of one device and plugs it into the input of another, allowing two similar devices to communicate without a network hub or switch. This is achieved by crossing over the transmission and reception pairs between connectors.<\/p>"},{"question":"What are the key features of a Crossover Cable?","answer":"

        Key features of crossover cables include the ability to establish direct, peer-to-peer connections between similar network devices, interchangeability with traditional Ethernet cables via crossover adapters, and wide compatibility with most Ethernet standards.<\/p>"},{"question":"What are the types of Crossover Cables?","answer":"

        There are generally two types of crossover cables: Ethernet crossover cables and null modem crossover cables. Ethernet crossover cables are used for connecting two computers or two switches without a router, while null modem crossover cables are used for older data communication setups.<\/p>"},{"question":"What are some common problems with Crossover Cables and their solutions?","answer":"

        A common problem that arises when using crossover cables is improper cable type detection, especially with older devices. This can usually be solved by manually setting the devices to use the crossover scheme.<\/p>"},{"question":"How are Crossover Cables different from other cables?","answer":"

        Crossover cables are distinct from straight-through and rollover cables in their inversion and use cases. Straight-through cables connect different devices without inversion and are used to connect a PC to a switch, router, or hub. Rollover cables connect different devices with full inversion and are used to connect a computer terminal to a router's console port.<\/p>"},{"question":"What are future perspectives and related technologies to Crossover Cables?","answer":"

        The future of networking technology leans towards wireless communication, which inherently negates the need for crossover cables. However, in scenarios where wired connections provide advantages, crossover cables may still find use. The growth of IoT and edge computing may also present new roles for crossover cables in direct device-to-device communications.<\/p>"},{"question":"How are proxy servers associated with Crossover Cables?","answer":"

        In the context of proxy servers, crossover cables could be used to connect two proxy servers directly, bypassing the need for a networking device. This could be useful in creating redundancy or increasing connection speed between the two servers. However, modern networking equipment and software often automate these processes, minimizing the need for physical crossovers.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/476477","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/476477\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media\/476478"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media?parent=476477"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}