{"id":6143,"date":"2020-08-12T02:56:59","date_gmt":"2020-08-12T02:56:59","guid":{"rendered":"https:\/\/vinacap.vn\/?post_type=tin-tuc&p=6143"},"modified":"2023-06-13T04:07:36","modified_gmt":"2023-06-13T04:07:36","slug":"cac-luu-y-khi-lua-chon-va-su-dung-day-cap-mang-lan","status":"publish","type":"tin-tuc","link":"https:\/\/vinacap.vn\/en\/archives\/tin-tuc\/cac-luu-y-khi-lua-chon-va-su-dung-day-cap-mang-lan","title":{"rendered":"C\u00c1C L\u01afU \u00dd KHI L\u1ef0A CH\u1eccN V\u00c0 S\u1eec D\u1ee4NG D\u00c2Y C\u00c1P M\u1ea0NG LAN"},"content":{"rendered":"

Tr\u00ean th\u1ecb tr\u01b0\u1eddng hi\u1ec7n nay c\u00f3 c\u1ef1c nhi\u1ec1u c\u00e1c doanh nghi\u1ec7p cung c\u1ea5p c\u00e1c d\u00e2y c\u00e1p m\u1ea1ng LAN v\u1edbi nh\u1eefng \u01b0u nh\u01b0\u1ee3c \u0111i\u1ec3m kh\u00e1c nhau. T\u1ea1i b\u00e0i vi\u1ebft n\u00e0y, VINACAP xin m\u00e1ch c\u00e1c b\u1ea1n c\u00e1c m\u1eb9o nh\u1ecf \u0111\u1ec3 c\u00f3 th\u1ec3 l\u1ef1a ch\u1ecdn 1 d\u00e2y c\u00e1p m\u1ea1ng LAN ch\u1ea5t l\u01b0\u1ee3ng, ph\u00f9 h\u1ee3p v\u1edbi m\u1ee5c \u0111ich s\u1eed d\u1ee5ng c\u1ee7a gia \u0111\u00ecnh.<\/p>\n

    \n
  1. C\u1ea5u t\u1ea1o d\u00e2y c\u00e1p m\u1ea1ng<\/strong><\/li>\n<\/ol>\n

    C\u00f3 2 lo\u1ea1i d\u00e2y c\u00e1p m\u1ea1ng:<\/p>\n

      \n
    • C\u00e1p \u0111\u1ed3ng tr\u1ee5c: c\u1ee9ng, lo\u1ea1i d\u00e2y n\u00e0y th\u01b0\u1eddng d\u00f9ng trong truy\u1ec1n h\u00ecnh c\u00e1p.<\/li>\n
    • C\u00e1p xo\u1eafn \u0111\u00f4i: m\u1ec1m v\u00e0 r\u1ebb, h\u1ea7u h\u1ebft d\u00f9ng trong c\u00e1p m\u1ea1ng LAN hi\u1ec7n nay.<\/li>\n<\/ul>\n

      \"\"<\/p>\n

        \n
      1. T\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eabn c\u1ee7a d\u00e2y c\u00e1p LAN<\/strong><\/li>\n<\/ol>\n

        D\u00e2y m\u1ea1ng LAN c\u00f3 t\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eabn cao nh\u1ea5t l\u00e0 c\u00e1p Cat7a h\u1ed7 tr\u1ee3 t\u1ed1c \u0111\u1ed9 truy\u1ec1n l\u00ean \u0111\u1ebfn 1000 Mbps (t\u1ee9c l\u00e0 1000 mega-bit m\u1ed7i gi\u00e2y, hay 125 mega-byte m\u1ed7i gi\u00e2y), hay c\u00f2n g\u1ecdi l\u00e0 lo\u1ea1i c\u00e1p h\u1ed7 tr\u1ee3 t\u1ed1c \u0111\u1ed9 giga-bit (Gbps) \u0111\u01b0\u1ee3c d\u00f9ng cho c\u00e1c thi\u1ebft b\u1ecb m\u1ea1ng \u0111\u1eddi m\u1edbi v\u1ed1n d\u0129 h\u1ed7 tr\u1ee3 t\u1ed1c \u0111\u1ed9 Gbps. Tuy nhi\u00ean vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1p m\u1ea1ng Cat7a c\u00f2n h\u1ea1n ch\u1ebf t\u1ea1i Vi\u1ec7t Nam do chi ph\u00ed qu\u00e1 \u0111\u1eaft.<\/p>\n

        Ngo\u00e0i ra, tr\u00ean th\u1ecb tr\u01b0\u1eddng c\u00f2n c\u00f3 c\u00e1c lo\u1ea1i c\u00e1p kh\u00e1c nh\u01b0: Cat3 (16 Mbps), Cat4 (20 Mbps), Cat5 (100 Mbps), Cat5e (100 Mbps), Cat6 (250 Mbps), Cat6a (250 Mbps).Trong \u0111\u00f3, c\u00e1p m\u1ea1ng Cat5e v\u00e0 Cat6 l\u00e0 2 lo\u1ea1i c\u00e1p m\u1ea1ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn nh\u1ea5t t\u1ea1i Vi\u1ec7t Nam hi\u1ec7n nay.<\/p>\n

          \n
        1. Ch\u1ee9ng t\u1eeb, ch\u1ee9ng nh\u1eadn c\u1ee7a d\u00e2y c\u00e1p m\u1ea1ng LAN<\/strong><\/li>\n<\/ol>\n

          a.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 CO, CQ<\/strong><\/p>\n

            \n
          • C\/O (Certificate Of Origin): l\u00e0 gi\u1ea5y ch\u1ee9ng nh\u1eadn xu\u1ea5t x\u1ee9 h\u00e0ng h\u00f3a, \u0111\u01b0\u1ee3c c\u1ea5p b\u1edfi c\u01a1 quan c\u00f3 th\u1ea9m quy\u1ec1n c\u1ee7a n\u01b0\u1edbc xu\u1ea5t kh\u1ea9u cho h\u00e0ng h\u00f3a xu\u1ea5t kh\u1ea9u \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t t\u1ea1i n\u01b0\u1edbc \u0111\u00f3. C\/O tu\u00e2n th\u1ee7 theo quy \u0111\u1ecbnh c\u1ee7a n\u01b0\u1edbc xu\u1ea5t kh\u1ea9u v\u00e0 c\u1ea3 n\u01b0\u1edbc nh\u1eadp kh\u1ea9u, n\u00ean c\u00f3 nhi\u1ec1u lo\u1ea1i CO ( c\u00f3 h\u1ea1n ng\u1ea1ch, \u01b0u \u0111\u00e3i thu\u1ebf quan, mi\u1ec5n thu\u1ebf,\u2026). Do \u0111\u00f3 m\u1ee5c \u0111\u00edch c\u1ee7a C\/O l\u00e0 ch\u1ee9ng minh xu\u1ea5t x\u1ee9 h\u00e0ng h\u00f3a c\u00f3 r\u00f5 r\u00e0ng, h\u1ee3p ph\u00e1p v\u1ec1 thu\u1ebf quan v\u00e0 c\u00e1c quy \u0111\u1ecbnh c\u1ee7a lu\u1eadt ph\u00e1p v\u1ec1 XNK c\u1ee7a hai n\u01b0\u1edbc nh\u1eadp v\u00e0 xu\u1ea5t kh\u1ea9u (hay n\u00f3i c\u00e1ch kh\u00e1c kh\u00f4ng ph\u1ea3i h\u00e0ng l\u1eadu hay h\u00e0ng tr\u00f4i n\u1ed5i kh\u00f4ng c\u00f3 nh\u00e0 s\u1ea3n xu\u1ea5t r\u00f5 r\u00e0ng).<\/li>\n
          • C\/Q (Certificate Of Quality): l\u00e0 ch\u1ee9ng nh\u1eadn ch\u1ea5t l\u01b0\u1ee3ng h\u00e0ng h\u00f3a h\u1ee3p v\u1edbi ti\u00eau chu\u1ea9n c\u1ee7a n\u01b0\u1edbc s\u1ea3n xu\u1ea5t hay c\u00e1c ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf. M\u1ee5c \u0111\u00edch c\u1ee7a CQ l\u00e0 ch\u1ee9ng minh h\u00e0ng h\u00f3a c\u00f3 \u0111\u1ea1t ch\u1ea5t l\u01b0\u1ee3ng h\u1ee3p ti\u00eau chu\u1ea9n ban b\u1ed1 k\u00e8m theo h\u00e0ng ho\u00e1 hay kh\u00f4ng.<\/li>\n<\/ul>\n

            \"\"<\/p>\n

              \n
            • ISO: l\u00e0 m\u1ed9t c\u01a1 quan thi\u1ebft l\u1eadp ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf bao g\u1ed3m nh\u1eefng \u0111\u1ea1i di\u1ec7n t\u1eeb c\u00e1ct\u1ed5 ch\u1ee9c ti\u00eau chu\u1ea9n c\u00e1c qu\u1ed1c gia. ISO \u0111\u01b0a ra c\u00e1c ti\u00eau chu\u1ea9n th\u01b0\u01a1ng m\u1ea1i v\u00e0 c\u00f4ng nghi\u1ec7p \u1edf ph\u1ea1m vi to\u00e0n th\u1ebf gi\u1edbi. ISO ban b\u1ed1 c\u00e1c ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf cho c\u00e1c nh\u00f3m s\u1ea3n ph\u1ea9m d\u1ecbch v\u1ee5 ri\u00eang tr\u00ean to\u00e0n th\u1ebf gi\u1edbi v\u00e0 ch\u1ee9ng nh\u1eadn cho nh\u1eefng c\u00f4ng ty \u0111\u1ea1t ti\u00eau chu\u1ea9n b\u1eb1ng Ch\u1ee9ng nh\u1eadn ISO.<\/li>\n<\/ul>\n

              Vi\u1ec7c nh\u00e0 s\u1ea3n xu\u1ea5t \u0111\u1ea1t ch\u1ee9ng nh\u1eadn ISO cho ta bi\u1ebft h\u1ecd s\u1ea3n xu\u1ea5t s\u1ea3n ph\u1ea9m tu\u00e2n th\u1ee7 m\u1ed9t c\u00e1ch nghi\u00eam ng\u1eb7t theo c\u00e1c ti\u00eau chu\u1ea9n v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng h\u00e0ng h\u00f3a. ISO ch\u00ednh l\u00e0 th\u01b0\u1edbc \u0111o cho c\u1ea3 m\u1ed9t qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t ra s\u1ea3n ph\u1ea9m\/d\u1ecbch v\u1ee5 ch\u1ee9 kh\u00f4ng ri\u00eang g\u00ec s\u1ea3n ph\u1ea9m\/d\u1ecbch v\u1ee5 \u1ea5y<\/p>\n

                \n
              • CE: l\u00e0 con d\u1ea5u bi\u1ec3u t\u01b0\u1ee3ng \u0111\u1ec3 ch\u1ee9ng t\u1ecf cam k\u1ebft c\u1ee7a nh\u00e0 ch\u1ebf t\u1ea1o cho s\u1ea3n ph\u1ea9m c\u1ee7a h\u1ecd \u0111\u00e3 \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u c\u1ee7a c\u00e1c lu\u1eadt \u0111\u1ecbnh c\u1ee7a h\u1ed9i \u0111\u1ed3ng Ch\u00e2u \u00c2u. Theo nh\u01b0 Lu\u1eadt \u0111\u1ecbnh c\u1ee7a c\u1ed9ng \u0111\u1ed3ng Ch\u00e2u \u00c2u h\u1ea7u h\u1ebft c\u00e1c s\u1ea3n ph\u1ea9m \u0111i\u1ec7n-\u0111i\u1ec7n t\u1eed (tr\u1eeb m\u1ed9t v\u00e0i s\u1ea3n ph\u1ea9m) \u0111\u1ec1u ph\u1ea3i c\u00f3 d\u1ea5u CE m\u1edbi \u0111\u01b0\u1ee3c l\u01b0u th\u00f4ng tr\u00ean th\u1ecb tr\u01b0\u1eddng Ch\u00e2u \u00c2u, \u0111\u1eb7c bi\u1ec7t c\u00e1c s\u1ea3n ph\u1ea9m d\u00e2y c\u00e1p m\u1ea1ng n\u00f3i chung v\u00e0 d\u00e2y m\u1ea1ng LAN n\u00f3i ri\u00eang.<\/li>\n<\/ul>\n

                Th\u1ecb tr\u01b0\u1eddng Ch\u00e2u \u00c2u l\u00e0 th\u1ecb tr\u01b0\u1eddng kh\u00f3 t\u00ednh b\u1eadc nh\u1ea5t th\u1ebf gi\u1edbi, m\u1ecdi s\u1ea3n ph\u1ea9m mu\u1ed1n l\u01b0u th\u00f4ng t\u1ea1i th\u1ecb tr\u01b0\u1eddng n\u00e0y bu\u1ed9c ph\u1ea3i \u0111\u00e1p \u1ee9ng \u0111\u1ea7y \u0111\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n kh\u1eaft khe c\u1ee7a h\u1ecd. N\u1ebfu d\u00e2y c\u00e1p m\u1ea1ng \u0111\u00e3 \u0111\u1ea1t \u0111\u01b0\u1ee3c ti\u00eau chu\u1ea9n CE th\u00ec n\u00f3 s\u1ebd d\u1ec5 d\u00e0ng \u0111\u01b0\u1ee3c l\u01b0u h\u00e0nh tr\u00ean c\u00e1c th\u1ecb tr\u01b0\u1eddng kh\u00e1c.<\/p>\n

                  \n
                • ROHS: l\u00e0 t\u1eeb vi\u1ebft t\u1eaft c\u1ee7a Restriction of Certain Hazardous Substances -ti\u00eau chu\u1ea9n nh\u1eb1m h\u1ea1n ch\u1ebf v\u1eadt ch\u1ea5t nguy hi\u1ec3m, g\u00f3p ph\u1ea7n b\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u1eddng trong c\u00e1c s\u1ea3n ph\u1ea9m n\u00f3i chung c\u0169ng nh\u01b0 d\u00e2y m\u1ea1ng LAN n\u00f3i ri\u00eang. Ti\u00eau chu\u1ea9n n\u00e0y d\u00f9ng lu\u1eadt ph\u00e1p c\u1ee7a Ch\u00e2u \u00c2u c\u1ea5m 6 lo\u1ea1i ch\u1ea5t \u0111\u1eb7c bi\u1ec7t nguy hi\u1ec3m \u0111\u1ed1i v\u1edbi m\u00f4i tr\u01b0\u1eddng c\u0169ng nh\u01b0 \u0111\u1ed1i v\u1edbi s\u1ee9c kho\u1ebb con ng\u01b0\u1eddi trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t: Thu\u1ef7 ng\u00e2n ( Hg), Cadmium (Cd),\u00a0 Chromium ho\u00e1 tr\u1ecb 6, h\u1ee3p ch\u1ea5t c\u1ee7a Brom nh\u01b0: PBBs (polybrominated biphenyls), PBDEs (polybrominated diphenyl ethers), v\u00e0 Ch\u00ec (Pb).<\/li>\n<\/ul>\n

                  ROHS c\u00f2n \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn l\u00e0 ti\u00eau chu\u1ea9n b\u1ea3o v\u1ec7 s\u1ee9c kh\u1ecfe cho ng\u01b0\u1eddi ti\u00eau d\u00f9ng v\u00e0 ch\u1ee9ng nh\u1eadn s\u1ea3n ph\u1ea9m th\u00e2n thi\u1ec7n v\u1edbi m\u00f4i tr\u01b0\u1eddng.<\/p>\n

                    \n
                  1. C\u00e1c th\u00f4ng s\u1ed1 ghi tr\u00ean v\u1ecf c\u00e1p m\u1ea1ng<\/strong><\/li>\n<\/ol>\n

                     <\/p>\n

                    Khi nh\u00ecn s\u1ee3i d\u00e2y c\u00e1p m\u1ea1ng LAN, b\u1ea1n s\u1ebd th\u1ea5y r\u1ea5t nhi\u1ec1u nh\u00f3m k\u00fd t\u1ef1, m\u1ed7i nh\u00f3m k\u00fd t\u1ef1 \u0111\u1eb7c tr\u01b0ng cho m\u1ed9t \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a c\u00e1p.<\/p>\n

                    UTP l\u00e0 c\u00e1p kh\u00f4ng c\u00f3 l\u1edbp ch\u1ed1ng nhi\u1ec5u cho t\u00edn hi\u1ec7u truy\u1ec1n d\u1eabn, STP th\u00ec c\u00f3 l\u1edbp ch\u1ed1ng nhi\u1ec5u.<\/p>\n

                    MPP hay CMP (c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ghi k\u00e8m theo ph\u01b0\u01a1ng ph\u00e1p th\u1eed nghi\u1ec7m UL910 hay CSA FT16) l\u00e0 lo\u1ea1i c\u00e1p \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 \u0111i tr\u00ean tr\u1ea7n nh\u00e0.<\/p>\n

                    MPR ho\u1eb7c CMR (v\u00e0 c\u0169ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ghi k\u00e8m UL1666 nh\u1eb1m th\u1ec3 hi\u1ec7n ph\u01b0\u01a1ng ph\u00e1p th\u1eed nghi\u1ec7m) c\u00f3 tr\u00ean v\u1ecf c\u00e1c lo\u1ea1i c\u00e1p s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111i gi\u1eefa c\u00e1c t\u1ea7ng.<\/p>\n

                    N\u1ebfu kh\u00f4ng ph\u1ea3i l\u00e0 lo\u1ea1i c\u00e1p \u0111\u1eb7c ch\u1ee7ng th\u00ec tr\u00ean v\u1ecf c\u00e1p th\u01b0\u1eddng c\u00f3 m\u1ed9t trong s\u1ed1 c\u00e1c nh\u00f3m k\u00fd t\u1ef1 nh\u01b0 MPG, CMG, MP, CM, th\u00ec \u0111\u00e2y l\u00e0 lo\u1ea1i c\u00e1p b\u00ecnh th\u01b0\u1eddng.<\/p>\n

                    Ngo\u00e0i ra, m\u1ed9t s\u1ed1 \u00edt lo\u1ea1i c\u00e1p c\u00f3 ghi nh\u00f3m k\u00fd t\u1ef1 CMUC \u0111\u1ec3 ch\u1ec9 r\u00f5 \u0111\u00e2y l\u00e0 loa d\u00f9ng kh\u00f4ng truy\u1ec1n t\u1ea3i l\u01b0\u1ee3ng d\u1eef li\u1ec7u l\u1edbn, hay kh\u00f4ng \u0111o t\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eef li\u1ec7u, c\u00e1c nh\u00f3m k\u00fd t\u1ef1 ghi tr\u00ean v\u1ecf c\u00e1p kh\u00f4ng c\u00f3 nhi\u1ec1u gi\u00e1 tr\u1ecb. Nh\u01b0ng n\u1ebfu d\u00f9ng \u0111\u1ec3 truy\u1ec1n t\u00edn hi\u1ec7u h\u00ecnh \u1ea3nh l\u1ea5y t\u1eeb camera (webcam) \u0111\u1eb7t \u1edf xa v\u1ec1 m\u00e1y t\u00ednh \u0111i\u1ec1u khi\u1ec3n hay m\u00e0n chi\u1ebfu th\u00ec vi\u1ec7c xem k\u1ef9 c\u00e1c nh\u00f3m k\u00fd t\u1ef1 tr\u00ean v\u1ecf c\u00e1p v\u00e0 ch\u1ecdn \u0111\u00fang lo\u1ea1i d\u00e2y c\u00e1p m\u1ea1ng LAN s\u1ebd cho h\u00ecnh \u1ea3nh r\u00f5 v\u00e0 \u00edt b\u1ecb nhi\u1ec5u t\u00edn hi\u1ec7u.<\/p>\n

                      \n
                    1. Ki\u1ec3m tra ch\u1ea5t l\u01b0\u1ee3ng d\u00e2y m\u1ea1ng LAN<\/strong><\/li>\n<\/ol>\n

                      + Ch\u1ea5t li\u1ec7u c\u1ee7a l\u00f5i d\u00e2y truy\u1ec1n t\u00edn hi\u1ec7u<\/strong><\/p>\n

                      Hi\u1ec7n nay tr\u00ean th\u1ecb tr\u01b0\u1eddng c\u00f3 r\u1ea5t nhi\u1ec1u lo\u1ea1i d\u00e2y m\u1ea1ng LAN kh\u00e1c nhau nh\u01b0ng ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c chia l\u00e0m 3 lo\u1ea1i ch\u00ednh \u0111\u00f3 l\u00e0: C\u00e1p CCA, C\u00e1p \u0111\u1ed3ng v\u00e0 c\u00e1p gi\u1ea3 \u2013 k\u00e9m ch\u1ea5t l\u01b0\u1ee3ng. Ch\u00fang ta ph\u1ea3i chia ra nh\u01b0 v\u1eady l\u00e0 do ch\u1ea5t li\u1ec7u trong l\u00f5i c\u1ee7a 8 s\u1ee3i d\u00e2y truy\u1ec1n t\u00edn hi\u1ec7u. C\u00e1p \u0111\u1ed3ng c\u00f3 l\u00f5i d\u00e2y \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb \u0111\u1ed3ng (Copper), c\u00e1p CCA c\u00f3 l\u00f5i d\u00e2y l\u00e0m t\u1eeb h\u1ee3p kim CCA (Copper Clad Aluminum \u2013 h\u1ee3p kim b\u1ecdc \u0111\u1ed3ng) v\u00e0 c\u00e1p gi\u1ea3 c\u00f3 l\u00f5i d\u00e2y l\u00e0m b\u1eb1ng s\u1eaft, kim lo\u1ea1i pha\u2026<\/p>\n

                      Ch\u1ea5t li\u1ec7u l\u00f5i d\u00e2y quy\u1ebft \u0111\u1ecbnh kh\u1ea3 n\u0103ng truy\u1ec1n t\u1ea3i c\u1ee7a d\u00e2y c\u00e1p m\u1ea1ng LAN, v\u00ec v\u1eady m\u00e0 kh\u00e1ch h\u00e0ng c\u1ea7n ki\u1ec3m tra k\u1ef9 ch\u1ea5t li\u1ec7u l\u00f5i d\u00e2y truy\u1ec1n t\u00edn hi\u1ec7u tr\u01b0\u1edbc khi mua c\u00e1p. \u0110\u1ed3ng l\u00e0 kim lo\u1ea1i truy\u1ec1n t\u1ea3i t\u00edn hi\u1ec7u t\u1ed1t nh\u1ea5t, ti\u1ebfp \u0111\u1ebfn l\u00e0 h\u1ee3p kim CCA v\u00e0 cu\u1ed1i c\u00f9ng l\u00e0 s\u1eaft. Tuy nhi\u00ean gi\u00e1 th\u00e0nh c\u1ee7a \u0111\u1ed3ng l\u1ea1i cao nh\u1ea5t r\u1ed3i \u0111\u1ebfn CCA c\u00f2n s\u1eaft th\u00ec r\u1ea5t r\u1ebb, do v\u1eady m\u00e0 c\u00e1p gi\u1ea3 ra \u0111\u1eddi. M\u1ed9t kinh nghi\u1ec7m nho nh\u1ecf cho\u00a0 kh\u00e1ch h\u00e0ng khi mua c\u00e1p m\u1ea1ng l\u00e0 mang theo th\u1ecfi nam ch\u00e2m \u0111\u1ec3 ki\u1ec3m tra ch\u1ea5t li\u1ec7u c\u1ee7a d\u00e2y d\u1eabn. N\u1ec1u nam ch\u00e2m h\u00fat l\u00f5i d\u00e2y th\u00ec \u0111\u00f3 ch\u00ednh l\u00e0 s\u1eaft c\u00f2n \u0111\u1ed3ng v\u00e0 CCA kh\u00f4ng b\u1ecb nam ch\u00e2m h\u00fat.<\/p>\n

                      + K\u00edch th\u01b0\u1edbc l\u00f5i d\u00e2y truy\u1ec1n t\u00edn hi\u1ec7u<\/strong><\/p>\n

                      Sau khi ki\u1ec3m tra ch\u1ea5t li\u1ec7u c\u1ee7a l\u00f5i d\u00e2y th\u00ec ti\u1ebfp theo qu\u00fd kh\u00e1ch h\u00e0ng n\u00ean l\u00e0m l\u00e0 ki\u1ec3m tra k\u00edch th\u01b0\u1edbc c\u1ee7a l\u00f5i d\u00e2y c\u00f3 \u0111\u00fang theo ti\u00eau chu\u1ea9n hay kh\u00f4ng.<\/p>\n

                      Theo Ti\u00eau Chu\u1ea9n TIA-568-B: Ti\u00eau chu\u1ea9n d\u00e2y c\u00e1p xo\u1eafn \u0111\u00f4i ( Ti\u00eau chu\u1ea9n th\u01b0\u01a1ng m\u1ea1i v\u1ec1 x\u00e2y d\u1ef1ng vi\u1ec5n th\u00f4ng ) th\u00ec d\u00e2y c\u00e1p CAT5E \u0111\u01b0\u1eddng k\u00ednh l\u00f5i d\u00e2y ph\u1ea3i \u0111\u1ea1t 0.51 mm (t\u1ee9c 24 AWG) v\u00e0 d\u00e2y c\u00e1p m\u1ea1ng CAT5 \u0111\u01b0\u1eddng k\u00ednh l\u00f5i d\u00e2y ph\u1ea3i \u0111\u1ea1t 0.57 mm (t\u1ee9c 23 AWG) th\u00ec m\u1edbi \u0111\u1ea3m b\u1ea3o \u0111\u00fang ti\u00eau chu\u1ea9n,\u2026<\/p>\n

                      K\u00edch th\u01b0\u1edbc c\u1ee7a l\u00f5i d\u00e2y d\u1eabn \u1ea3nh h\u01b0\u1edfng kh\u00e1 nhi\u1ec1u t\u1edbi kh\u1ea3 n\u0103ng truy\u1ec1n t\u1ea3i c\u1ee7a c\u00e1p m\u1ea1ng, \u0111\u01b0\u1eddng k\u00ednh l\u00f5i d\u00e2y l\u1edbn th\u00ec d\u00e2y c\u00e1p m\u1ea1ng LAN truy\u1ec1n t\u1ea3i t\u1ed1t h\u01a1n. Tuy nhi\u00ean, l\u00f5i d\u00e2y c\u00e0ng l\u1edbn th\u00ec chi ph\u00ed ph\u1ea3i tr\u1ea3 c\u00e0ng t\u0103ng cao v\u00ec th\u1ebf m\u00e0 nhi\u1ec1u nh\u00e0 s\u1ea3n xu\u1ea5t \u0111\u00e3 c\u1ed1 t\u00ecnh l\u1eeba g\u1ea1t ng\u01b0\u1eddi ti\u00eau d\u00f9ng b\u1eb1ng c\u00e1ch gi\u1ea3m k\u00edch th\u01b0\u1edbc c\u1ee7a l\u00f5i d\u00e2y d\u1eabn v\u00e0 t\u0103ng \u0111\u1ed9 d\u00e0y c\u1ee7a v\u1ecf nh\u1ef1a b\u1ecdc ngo\u00e0i c\u1ee7a 8 d\u00e2y truy\u1ec1n t\u00edn hi\u1ec7u. Tho\u1ea1t nh\u00ecn KH s\u1ebd l\u1ea7m t\u01b0\u1edfng l\u00e0 d\u00e2y m\u1ea1ng \u0111\u1ea1t ti\u00eau chu\u1ea9n v\u1ec1 k\u00edch th\u01b0\u1edbc nh\u01b0ng th\u1ef1c ra th\u00ec kh\u00f4ng \u0111\u1ee7 chu\u1ea9n.<\/p>\n

                      \u00a0+ \u0110\u1ed9 xo\u1eafn c\u1ee7a 4 c\u1eb7p d\u00e2y truy\u1ec1n t\u00edn hi\u1ec7u<\/strong><\/p>\n

                      D\u00e2y c\u00e1p m\u1ea1ng c\u00f3 t\u00ean ti\u1ebfng Anh l\u00e0 Twisted Pair Cable \u0111\u01b0\u1ee3c d\u1ecbch sang ti\u1ebfng Vi\u1ec7t l\u00e0 c\u1eafp xo\u1eafn \u0111\u00f4i v\u00ec \u0111\u1eb7c t\u00ednh c\u1ee7a n\u00f3 c\u00f3 4 c\u1eb7p d\u00e2y \u0111\u01b0\u1ee3c xo\u1eafn v\u1edbi nhau. M\u1ed9t c\u1eb7p d\u00e2y g\u1ed3m 2 d\u00e2y \u0111\u01a1n xo\u1eafn ch\u1eb7t v\u1edbi nhau, vi\u1ec7c xo\u1eafn 2 d\u00e2y v\u1edbi nhau l\u00e0 \u0111\u1ec3 d\u00e2y m\u1ea1ng LAN gi\u1ea3m nhi\u1ec5u ch\u00e9o (Crosstalk) v\u00e0 gi\u1ea3m nhi\u1ec5u \u0111i\u1ec7n t\u1eeb EMI t\u1eeb m\u00f4i tr\u01b0\u1eddng b\u00ean ngo\u00e0i.<\/p>\n

                      C\u00e0ng xo\u1eafn ch\u1eb7t (nhi\u1ec1u v\u00f2ng) th\u00ec s\u1ebd c\u00e0ng gi\u1ea3m \u0111\u01b0\u1ee3c t\u1ed1i \u0111a nhi\u1ec5u ch\u00e9o g\u00e2y ra. Th\u00f4ng th\u01b0\u1eddng th\u00ec c\u1ee9 10cm th\u00ec hai d\u00e2y xo\u1eafn 20 v\u00f2ng v\u1edbi nhau \u0111\u1ed1i v\u1edbi c\u00e1p Cat5. Tuy nhi\u00ean ch\u00ednh vi\u1ec7c xo\u1eafn ch\u1eb7t v\u00e0 nhi\u1ec1u v\u00f2ng l\u1ea1i g\u00e2y hao t\u1ed1n nguy\u00ean v\u1eadt li\u1ec7u d\u1eabn t\u1edbi chi ph\u00ed t\u0103ng cao. \u0110\u00e2y c\u0169ng l\u00e0 m\u1ed9t trong nh\u1eefng y\u1ebfu t\u1ed1 quy\u1ebft \u0111\u1ecbnh t\u1edbi kh\u1ea3 n\u0103ng truy\u1ec1n t\u1ea3i c\u1ee7a d\u00e2y c\u00e1p m\u1ea1ng.<\/p>\n

                      Hi\u1ec7n nay, c\u00f3 nhi\u1ec1u nh\u00e0 s\u1ea3n xu\u1ea5t v\u00ec l\u1ee3i nhu\u1eadn \u0111\u00e3 c\u1ed1 t\u00ecnh xo\u1eafn th\u01b0a h\u01a1n quy \u0111\u1ecbnh \u0111\u1ec3 gi\u1ea3m chi ph\u00ed xu\u1ed1ng, n\u00ean KH ph\u1ea3i l\u01b0u \u00fd t\u1edbi y\u1ebfu t\u1ed1 n\u00e0y \u0111\u1ec3 mua \u0111\u00fang s\u1ea3n ph\u1ea9m ch\u1ea5t l\u01b0\u1ee3ng.<\/p>\n

                      + \u0110\u1ea7y \u0111\u1ee7 c\u00e1c th\u00e0nh ph\u1ea7n theo chu\u1ea9n c\u00e1p quy \u0111\u1ecbnh<\/strong><\/p>\n

                      \u0110\u00e2y l\u00e0 \u0111i\u1ec3m \u0111\u1eb7c bi\u1ec7t m\u00e0 KH c\u1ea7n ph\u1ea3i l\u01b0u \u00fd khi mua c\u00e1p m\u1ea1ng ch\u1ed1ng nhi\u1ec5u. Th\u01b0\u1eddng th\u00ec tr\u00ean th\u1ecb tr\u01b0\u1eddng c\u00f3 2 chu\u1ea9n c\u00e1p m\u1ea1ng ch\u1ed1ng nhi\u1ec5u ph\u1ed5 bi\u1ebfn l\u00e0 chu\u1ea9n FTP v\u00e0 SFTP.<\/p>\n

                      + Ch\u1ea5t li\u1ec7u c\u1ee7a c\u00e1c th\u00e0nh ph\u1ea7n kh\u00e1c<\/strong><\/p>\n

                      Ngo\u00e0i c\u00e1c y\u1ebfu t\u1ed1 tr\u00ean th\u00ec qu\u00fd kh\u00e1ch h\u00e0ng c\u1ea7n l\u01b0u \u00fd t\u1edbi ch\u1ea5t li\u1ec7u c\u1ee7a c\u00e1c th\u00e0nh ph\u1ea7n kh\u00e1c nh\u01b0 v\u1ecf b\u1ecdc ngo\u00e0i c\u1ee7a c\u00e1p c\u00f3 ch\u1eafc v\u00e0 dai hay kh\u00f4ng. D\u00e2y d\u00f9 tr\u1ee3 l\u1ef1c c\u00f3 ch\u1eafc ch\u1eafn hay kh\u00f4ng? V\u1ecf b\u1ecdc l\u00f5i d\u00e2y c\u00f3 \u0111\u1ee7 \u0111\u1ed9 d\u00e0y hay kh\u00f4ng v.v\u2026<\/p>","protected":false},"featured_media":5672,"parent":0,"menu_order":0,"template":"","tags":[],"category-news":[103],"class_list":["post-6143","tin-tuc","type-tin-tuc","status-publish","has-post-thumbnail","hentry","category-news-tin-cong-ty"],"acf":[],"_links":{"self":[{"href":"https:\/\/vinacap.vn\/en\/wp-json\/wp\/v2\/tin-tuc\/6143","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vinacap.vn\/en\/wp-json\/wp\/v2\/tin-tuc"}],"about":[{"href":"https:\/\/vinacap.vn\/en\/wp-json\/wp\/v2\/types\/tin-tuc"}],"version-history":[{"count":1,"href":"https:\/\/vinacap.vn\/en\/wp-json\/wp\/v2\/tin-tuc\/6143\/revisions"}],"predecessor-version":[{"id":7639,"href":"https:\/\/vinacap.vn\/en\/wp-json\/wp\/v2\/tin-tuc\/6143\/revisions\/7639"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vinacap.vn\/en\/wp-json\/wp\/v2\/media\/5672"}],"wp:attachment":[{"href":"https:\/\/vinacap.vn\/en\/wp-json\/wp\/v2\/media?parent=6143"}],"wp:term":[{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vinacap.vn\/en\/wp-json\/wp\/v2\/tags?post=6143"},{"taxonomy":"category-news","embeddable":true,"href":"https:\/\/vinacap.vn\/en\/wp-json\/wp\/v2\/category-news?post=6143"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}