{"id":4936,"date":"2025-09-23T11:12:00","date_gmt":"2025-09-23T11:12:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/knowledge-center\/what-is-ethernet-wired-networking-technology-explained\/"},"modified":"2026-06-22T06:46:59","modified_gmt":"2026-06-22T06:46:59","slug":"what-is-ethernet-wired-networking-technology-explained","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/what-is-ethernet-wired-networking-technology-explained","title":{"rendered":"Ethernet l\u00e0 g\u00ec? Gi\u1ea3i th\u00edch v\u1ec1 x\u01b0\u01a1ng s\u1ed1ng c\u00f3 d\u00e2y c\u1ee7a m\u1ea1ng c\u1ee7a b\u1ea1n"},"content":{"rendered":"
\"What<\/figure>\n\n\n\n

B\u1ea1n c\u00f3 th\u1ec3 h\u1ecfi, Ethernet l\u00e0 g\u00ec?<\/strong> Ethernet k\u1ebft n\u1ed1i m\u00e1y t\u00ednh, m\u00e1y ch\u01a1i game ho\u1eb7c TV th\u00f4ng minh c\u1ee7a b\u1ea1n v\u1edbi internet th\u00f4ng qua m\u1ed9t c\u00e1p. B\u1ea1n s\u1eed d\u1ee5ng Ethernet t\u1ea1i nh\u00e0 ho\u1eb7c n\u01a1i l\u00e0m vi\u1ec7c khi mu\u1ed1n k\u1ebft n\u1ed1i internet nhanh v\u00e0 \u1ed5n \u0111\u1ecbnh. Nhi\u1ec1u ng\u01b0\u1eddi th\u00edch Ethernet v\u00ec n\u00f3 nhanh h\u01a1n v\u00e0 \u0111\u00e1ng tin c\u1eady h\u01a1n so v\u1edbi k\u1ebft n\u1ed1i kh\u00f4ng d\u00e2y. D\u1eef li\u1ec7u c\u1ee7a b\u1ea1n di chuy\u1ec3n an to\u00e0n qua c\u00e1p Ethernet<\/strong><\/a>, do \u0111\u00f3 c\u00e1c ho\u1ea1t \u0111\u1ed9ng tr\u1ef1c tuy\u1ebfn c\u1ee7a b\u1ea1n b\u1ea3o m\u1eadt h\u01a1n. N\u1ebfu b\u1ea1n c\u1ea7n k\u1ebft n\u1ed1i m\u1ea1nh \u0111\u1ec3 ph\u00e1t tr\u1ef1c tuy\u1ebfn, h\u1ecdc tr\u1ef1c tuy\u1ebfn ho\u1eb7c g\u1ecdi video, Ethernet mang l\u1ea1i k\u1ebft qu\u1ea3 t\u1ed1t nh\u1ea5t.<\/p>\n\n\n\n

M\u1eb9o: H\u00e3y th\u1eed Ethernet n\u1ebfu Wi-Fi c\u1ee7a b\u1ea1n ch\u1eadm ho\u1eb7c th\u01b0\u1eddng xuy\u00ean b\u1ecb ng\u1eaft. N\u00f3 th\u01b0\u1eddng kh\u1eafc ph\u1ee5c \u0111\u01b0\u1ee3c v\u1ea5n \u0111\u1ec1!<\/p><\/blockquote>\n\n\n\n

\ud83d\udcc4 Ethernet l\u00e0 g\u00ec? H\u01a1n c\u1ea3 m\u1ed9t chi\u1ebfc c\u00e1p<\/strong><\/h2>\n\n\n\n

Trong th\u1ebf gi\u1edbi k\u1ebft n\u1ed1i kh\u00f4ng d\u00e2y hi\u1ec7n \u0111\u1ea1i, b\u1ea1n c\u00f3 th\u1ec3 ngh\u0129 r\u1eb1ng c\u00e1p \u0111\u00e3 tr\u1edf th\u00e0nh d\u0129 v\u00e3ng. Nh\u01b0ng khi n\u00f3i \u0111\u1ebfn k\u1ebft n\u1ed1i internet \u1ed5n \u0111\u1ecbnh, t\u1ed1c \u0111\u1ed9 cao v\u00e0 b\u1ea3o m\u1eadt, kh\u00f4ng g\u00ec s\u00e1nh b\u1eb1ng m\u1ed9t k\u1ebft n\u1ed1i c\u00f3 d\u00e2y truy\u1ec1n th\u1ed1ng. \u1ede trung t\u00e2m c\u1ee7a \u201cph\u00e9p m\u00e0u\u201d c\u00f3 d\u00e2y n\u00e0y l\u00e0 m\u1ed9t c\u00f4ng ngh\u1ec7 mang t\u00ean Ethernet<\/strong>.<\/p>\n\n\n\n

N\u00f3i m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n, Ethernet l\u00e0 m\u1ed9t c\u00f4ng ngh\u1ec7 truy\u1ec1n th\u1ed1ng k\u1ebft n\u1ed1i c\u00e1c thi\u1ebft b\u1ecb trong m\u1ed9t <\/strong>M\u1ea1ng c\u1ee5c b\u1ed9 (LAN)<\/strong><\/a> or <\/strong>M\u1ea1ng di\u1ec7n r\u1ed9ng (WAN)<\/strong><\/a>.<\/strong> N\u00f3 s\u1eed d\u1ee5ng c\u00e1p v\u1eadt l\u00fd\u2014nh\u01b0 chi\u1ebfc c\u00e1p m\u00e0u xanh quen thu\u1ed9c n\u1ed1i t\u1eeb b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn c\u1ee7a b\u1ea1n \u0111\u1ebfn m\u00e1y t\u00ednh\u2014\u0111\u1ec3 truy\u1ec1n d\u1eef li\u1ec7u. \u0110\u00e2y l\u00e0 ti\u00eau chu\u1ea9n n\u1ec1n t\u1ea3ng quy \u0111\u1ecbnh c\u00e1ch d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c \u0111\u1ecbnh d\u1ea1ng v\u00e0 g\u1eedi \u0111i qua c\u00e1c c\u00e1p n\u00e0y, \u0111\u1ea3m b\u1ea3o c\u00e1c thi\u1ebft b\u1ecb t\u1eeb c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t kh\u00e1c nhau c\u00f3 th\u1ec3 giao ti\u1ebfp li\u1ec1n m\u1ea1ch.<\/p>\n\n\n\n

Trong khi Wi-Fi mang l\u1ea1i s\u1ef1 t\u1ef1 do, Ethernet cung c\u1ea5p \u0111\u1ed9 tin c\u1eady. D\u00f9 b\u1ea1n l\u00e0 game th\u1ee7 chuy\u00ean nghi\u1ec7p, ng\u01b0\u1eddi \u0111am m\u00ea ph\u00e1t tr\u1ef1c tuy\u1ebfn hay \u0111ang v\u1eadn h\u00e0nh m\u00e1y ch\u1ee7 doanh nghi\u1ec7p, vi\u1ec7c hi\u1ec3u r\u00f5 Ethernet l\u00e0 ch\u00eca kh\u00f3a \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a m\u1ea1ng c\u1ee7a b\u1ea1n.<\/p>\n\n\n\n

\ud83d\udcc4 Ethernet ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o? Nguy\u00ean l\u00fd c\u01a1 b\u1ea3n<\/strong><\/h2>\n\n\n\n

Ethernet ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean m\u1ed9t nguy\u00ean l\u00fd g\u1ecdi l\u00e0 Truy c\u1eadp \u0111a \u0111i\u1ec3m c\u00f3 c\u1ea3m bi\u1ebfn s\u00f3ng mang k\u00e8m ph\u00e1t hi\u1ec7n va ch\u1ea1m (CSMA\/CD)<\/strong>. H\u00e3y t\u01b0\u1edfng t\u01b0\u1ee3ng n\u00f3 gi\u1ed1ng nh\u01b0 m\u1ed9t cu\u1ed9c tr\u00f2 chuy\u1ec7n l\u1ecbch s\u1ef1 trong m\u1ed9t c\u0103n ph\u00f2ng:<\/p>\n\n\n\n

    \n

  1. L\u1eafng nghe tr\u01b0\u1edbc:<\/strong> M\u1ed9t thi\u1ebft b\u1ecb \u201cl\u1eafng nghe\u201d \u0111\u01b0\u1eddng c\u00e1p m\u1ea1ng \u0111\u1ec3 ki\u1ec3m tra xem \u0111\u01b0\u1eddng truy\u1ec1n c\u00f3 tr\u1ed1ng hay kh\u00f4ng tr\u01b0\u1edbc khi g\u1eedi d\u1eef li\u1ec7u.<\/p><\/li>

  2. G\u1eedi d\u1eef li\u1ec7u:<\/strong> N\u1ebfu \u0111\u01b0\u1eddng truy\u1ec1n tr\u1ed1ng, thi\u1ebft b\u1ecb s\u1ebd truy\u1ec1n g\u00f3i d\u1eef li\u1ec7u.<\/p><\/li>

  3. Ph\u00e1t hi\u1ec7n va ch\u1ea1m:<\/strong> N\u1ebfu hai thi\u1ebft b\u1ecb g\u1eedi d\u1eef li\u1ec7u c\u00f9ng m\u1ed9t l\u00fac, s\u1ebd x\u1ea3y ra \u201cva ch\u1ea1m\u201d. C\u1ea3 hai thi\u1ebft b\u1ecb \u0111\u1ec1u ph\u00e1t hi\u1ec7n \u0111i\u1ec1u n\u00e0y, ch\u1edd m\u1ed9t kho\u1ea3ng th\u1eddi gian ng\u1eafn ng\u1eabu nhi\u00ean r\u1ed3i th\u1eed l\u1ea1i.<\/p><\/li>\n<\/ol>\n\n\n\n

    H\u1ec7 th\u1ed1ng n\u00e0y, \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh b\u1edfi IEEE 802.3<\/strong><\/a>, t\u1ea1o ra lu\u1ed3ng th\u00f4ng tin c\u00f3 tr\u1eadt t\u1ef1. M\u1ed7i thi\u1ebft b\u1ecb c\u00f3 m\u1ed9t \u0111\u1ecba ch\u1ec9 v\u1eadt l\u00fd duy nh\u1ea5t g\u1ecdi l\u00e0 \u0110\u1ecba ch\u1ec9 MAC (Media Access Control Address)<\/strong>, \u0111\u00f3ng vai tr\u00f2 nh\u01b0 \u0111\u1ecba ch\u1ec9 nh\u00e0 cho card m\u1ea1ng c\u1ee7a b\u1ea1n, \u0111\u1ea3m b\u1ea3o d\u1eef li\u1ec7u \u0111\u1ebfn \u0111\u00fang \u0111\u00edch.<\/p>\n\n\n\n

    \ud83d\udcc4 C\u00e1c lo\u1ea1i c\u00e1p Ethernet v\u00e0 t\u1ed1c \u0111\u1ed9: Ch\u1ecdn lo\u1ea1i ph\u00f9 h\u1ee3p<\/strong><\/h2>\n\n\n\n

    Kh\u00f4ng ph\u1ea3i t\u1ea5t c\u1ea3 c\u00e1p Ethernet \u0111\u1ec1u gi\u1ed1ng nhau. Ch\u00fang \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i theo c\u00e1c s\u1ed1 \u201cCat\u201d, ph\u1ea3n \u00e1nh kh\u1ea3 n\u0103ng hi\u1ec7u su\u1ea5t c\u1ee7a ch\u00fang. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 b\u1ea3ng h\u01b0\u1edbng d\u1eabn nhanh v\u1ec1 c\u00e1c lo\u1ea1i ph\u1ed5 bi\u1ebfn nh\u1ea5t:<\/p>\n\n\n\n

    \n\n<\/colgroup>

    Lo\u1ea1i c\u00e1p<\/p><\/th>

    T\u1ed1c \u0111\u1ed9 t\u1ed1i \u0111a h\u1ed7 tr\u1ee3<\/p><\/th>

    B\u0103ng th\u00f4ng (t\u1ea7n s\u1ed1)<\/p><\/th>

    Tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn<\/p><\/th><\/tr>

    Cat 5<\/strong><\/p><\/td>

    100 Mbps<\/p><\/td>

    100 MHz<\/p><\/td>

    \u0110\u00e3 l\u1ed7i th\u1eddi, kh\u00f4ng khuy\u1ebfn kh\u00edch s\u1eed d\u1ee5ng cho c\u00e1c l\u1eafp \u0111\u1eb7t m\u1edbi.<\/p><\/td><\/tr>

    Cat 5e<\/strong><\/p><\/td>

    1 Gbps (1000 Mbps)<\/p><\/td>

    100 MHz<\/p><\/td>

    Ti\u00eau chu\u1ea9n cho h\u1ea7u h\u1ebft m\u1ea1ng gia \u0111\u00ecnh v\u00e0 v\u0103n ph\u00f2ng.<\/p><\/td><\/tr>

    Cat 6<\/strong><\/p><\/td>

    1 Gbps (l\u00ean \u0111\u1ebfn 10 Gbps \u1edf kho\u1ea3ng c\u00e1ch ng\u1eafn)<\/p><\/td>

    250 MHz<\/p><\/td>

    Ph\u00f9 h\u1ee3p h\u01a1n cho ch\u01a1i game, ph\u00e1t tr\u1ef1c tuy\u1ebfn 4K v\u00e0 nh\u00e0 \u1edf di\u1ec7n t\u00edch l\u1edbn.<\/p><\/td><\/tr>

    Cat 6a<\/strong><\/p><\/td>

    10 Gbps<\/p><\/td>

    500 MHz<\/p><\/td>

    S\u1eed d\u1ee5ng chuy\u00ean nghi\u1ec7p, trung t\u00e2m d\u1eef li\u1ec7u, m\u1ea1ng hi\u1ec7u su\u1ea5t cao.<\/p><\/td><\/tr>

    Cat 7\/8<\/strong><\/p><\/td>

    10\/40 Gbps<\/p><\/td>

    600\/2000 MHz<\/p><\/td>

    \u1ee8ng d\u1ee5ng t\u1ea7n s\u1ed1 cao chuy\u00ean bi\u1ec7t, trung t\u00e2m d\u1eef li\u1ec7u.<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n

    \u0110\u1ed1i v\u1edbi ph\u1ea7n l\u1edbn ng\u01b0\u1eddi d\u00f9ng, m\u1ed9t c\u00e1p <\/span>Cat 5e ho\u1eb7c Cat 6<\/strong><\/span> l\u00e0 ho\u00e0n to\u00e0n \u0111\u1ee7. N\u1ebfu b\u1ea1n \u0111\u0103ng k\u00fd g\u00f3i internet \u0111a gigabit ho\u1eb7c th\u01b0\u1eddng xuy\u00ean truy\u1ec1n t\u1eadp tin dung l\u01b0\u1ee3ng l\u1edbn n\u1ed9i b\u1ed9, h\u00e3y c\u00e2n nh\u1eafc <\/span>Cat 6a<\/strong><\/span> ho\u1eb7c cao h\u01a1n.<\/span><\/p>\n\n\n\n

    \ud83d\udcc4 Ethernet so v\u1edbi Wi-Fi: V\u00ec sao n\u00ean ch\u1ecdn k\u1ebft n\u1ed1i c\u00f3 d\u00e2y?<\/strong><\/h2>\n\n\n\n

    T\u1ea1i sao ph\u1ea3i d\u00f9ng c\u00e1p trong khi Wi-Fi l\u1ea1i ti\u1ec7n l\u1ee3i \u0111\u1ebfn th\u1ebf? D\u01b0\u1edbi \u0111\u00e2y l\u00e0 nh\u1eefng \u01b0u \u0111i\u1ec3m n\u1ed5i b\u1eadt c\u1ee7a Ethernet:<\/p>\n\n\n\n