{"id":478048,"date":"2023-08-09T09:26:29","date_gmt":"2023-08-09T09:26:29","guid":{"rendered":""},"modified":"2023-09-05T11:15:58","modified_gmt":"2023-09-05T11:15:58","slug":"modem","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/vn\/wiki\/modem\/","title":{"rendered":"Modem"},"content":{"rendered":"

Modem, vi\u1ebft t\u1eaft c\u1ee7a \u201cb\u1ed9 \u0111i\u1ec1u bi\u1ebfn-gi\u1ea3i \u0111i\u1ec1u ch\u1ebf\u201d, l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb quan tr\u1ecdng trong c\u00e1c h\u1ec7 th\u1ed1ng truy\u1ec1n th\u00f4ng hi\u1ec7n \u0111\u1ea1i cho ph\u00e9p truy\u1ec1n v\u00e0 nh\u1eadn d\u1eef li\u1ec7u s\u1ed1 qua c\u00e1c k\u00eanh truy\u1ec1n th\u00f4ng analog. N\u00f3 \u0111\u00f3ng vai tr\u00f2 l\u00e0 c\u1ea7u n\u1ed1i gi\u1eefa c\u00e1c thi\u1ebft b\u1ecb k\u1ef9 thu\u1eadt s\u1ed1, ch\u1eb3ng h\u1ea1n nh\u01b0 m\u00e1y t\u00ednh v\u00e0 t\u00edn hi\u1ec7u t\u01b0\u01a1ng t\u1ef1 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng b\u1edfi c\u00e1c m\u1ea1ng truy\u1ec1n th\u00f4ng truy\u1ec1n th\u1ed1ng. Modem \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t trong vi\u1ec7c k\u1ebft n\u1ed1i ng\u01b0\u1eddi d\u00f9ng v\u1edbi internet, khi\u1ebfn n\u00f3 tr\u1edf th\u00e0nh m\u1ed9t th\u00e0nh ph\u1ea7n kh\u00f4ng th\u1ec3 thi\u1ebfu trong th\u1ebf gi\u1edbi k\u1ebft n\u1ed1i ng\u00e0y nay.<\/p>\n

L\u1ecbch s\u1eed ngu\u1ed3n g\u1ed1c c\u1ee7a Modem v\u00e0 nh\u1eefng l\u1ea7n \u0111\u1ea7u ti\u00ean nh\u1eafc \u0111\u1ebfn n\u00f3<\/h2>\n

Kh\u00e1i ni\u1ec7m t\u00edn hi\u1ec7u \u0111i\u1ec1u ch\u1ebf v\u00e0 gi\u1ea3i \u0111i\u1ec1u ch\u1ebf c\u00f3 th\u1ec3 b\u1eaft ngu\u1ed3n t\u1eeb \u0111\u1ea7u nh\u1eefng n\u0103m 1940. Tuy nhi\u00ean, ph\u1ea3i \u0111\u1ebfn nh\u1eefng n\u0103m 1950, c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u m\u1edbi b\u1eaft \u0111\u1ea7u kh\u00e1m ph\u00e1 kh\u1ea3 n\u0103ng truy\u1ec1n d\u1eef li\u1ec7u s\u1ed1 qua c\u00e1c \u0111\u01b0\u1eddng d\u00e2y \u0111i\u1ec7n tho\u1ea1i analog hi\u1ec7n c\u00f3. L\u1ea7n \u0111\u1ea7u ti\u00ean \u0111\u1ec1 c\u1eadp \u0111\u1ebfn m\u1ed9t thi\u1ebft b\u1ecb gi\u1ed1ng modem c\u00f3 th\u1ec3 l\u00e0 do c\u00f4ng tr\u00ecnh c\u1ee7a c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u t\u1ea1i Bell Labs \u1edf Hoa K\u1ef3.<\/p>\n

N\u0103m 1958, Bell Labs gi\u1edbi thi\u1ec7u \u201cModem 1B\u201d, c\u00f3 th\u1ec3 truy\u1ec1n d\u1eef li\u1ec7u v\u1edbi t\u1ed1c \u0111\u1ed9 110 bit m\u1ed7i gi\u00e2y (bps). Trong nh\u1eefng th\u1eadp k\u1ef7 ti\u1ebfp theo, c\u00f4ng ngh\u1ec7 modem \u0111\u00e3 tr\u1ea3i qua s\u1ef1 ph\u00e1t tri\u1ec3n nhanh ch\u00f3ng, c\u1ea3i thi\u1ec7n t\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eef li\u1ec7u v\u00e0 m\u1edf \u0111\u01b0\u1eddng cho vi\u1ec7c \u00e1p d\u1ee5ng r\u1ed9ng r\u00e3i Internet.<\/p>\n

Th\u00f4ng tin chi ti\u1ebft v\u1ec1 Modem. M\u1edf r\u1ed9ng ch\u1ee7 \u0111\u1ec1 Modem.<\/h2>\n

Ch\u1ee9c n\u0103ng ch\u00ednh c\u1ee7a modem l\u00e0 chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u s\u1ed1 t\u1eeb m\u00e1y t\u00ednh ho\u1eb7c c\u00e1c thi\u1ebft b\u1ecb kh\u00e1c th\u00e0nh t\u00edn hi\u1ec7u t\u01b0\u01a1ng t\u1ef1 ph\u00f9 h\u1ee3p \u0111\u1ec3 truy\u1ec1n qua c\u00e1c k\u00eanh li\u00ean l\u1ea1c t\u01b0\u01a1ng t\u1ef1, ch\u1eb3ng h\u1ea1n nh\u01b0 \u0111\u01b0\u1eddng d\u00e2y \u0111i\u1ec7n tho\u1ea1i. \u1ede \u0111\u1ea7u nh\u1eadn, n\u00f3 chuy\u1ec3n \u0111\u1ed5i t\u00edn hi\u1ec7u t\u01b0\u01a1ng t\u1ef1 th\u00e0nh d\u1eef li\u1ec7u s\u1ed1, t\u1ea1o \u0111i\u1ec1u ki\u1ec7n li\u00ean l\u1ea1c gi\u1eefa c\u00e1c thi\u1ebft b\u1ecb k\u1ef9 thu\u1eadt s\u1ed1.<\/p>\n

Hai ch\u1ee9c n\u0103ng ch\u00ednh c\u1ee7a modem l\u00e0:<\/p>\n

    \n
  1. \n

    \u0110i\u1ec1u ch\u1ebf: Trong qu\u00e1 tr\u00ecnh \u0111i\u1ec1u ch\u1ebf, modem chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u s\u1ed1 th\u00e0nh t\u00edn hi\u1ec7u t\u01b0\u01a1ng t\u1ef1. N\u00f3 \u0111\u1ea1t \u0111\u01b0\u1ee3c \u0111i\u1ec1u n\u00e0y b\u1eb1ng c\u00e1ch thay \u0111\u1ed5i bi\u00ean \u0111\u1ed9, t\u1ea7n s\u1ed1 ho\u1eb7c pha c\u1ee7a t\u00edn hi\u1ec7u s\u00f3ng mang t\u01b0\u01a1ng \u1ee9ng v\u1edbi d\u1eef li\u1ec7u s\u1ed1.<\/p>\n<\/li>\n

  2. \n

    Gi\u1ea3i \u0111i\u1ec1u ch\u1ebf: \u1ede \u0111\u1ea7u nh\u1eadn, modem gi\u1ea3i \u0111i\u1ec1u ch\u1ebf c\u00e1c t\u00edn hi\u1ec7u t\u01b0\u01a1ng t\u1ef1 \u0111\u1ebfn. N\u00f3 tr\u00edch xu\u1ea5t d\u1eef li\u1ec7u s\u1ed1 b\u1eb1ng c\u00e1ch gi\u1ea3i th\u00edch c\u00e1c bi\u1ebfn th\u1ec3 trong t\u00edn hi\u1ec7u s\u00f3ng mang.<\/p>\n<\/li>\n<\/ol>\n

    C\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a Modem. C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a Modem.<\/h2>\n

    C\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a modem c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c chia th\u00e0nh nhi\u1ec1u th\u00e0nh ph\u1ea7n thi\u1ebft y\u1ebfu:<\/p>\n

      \n
    1. \n

      B\u1ed9 t\u1ea1o t\u00edn hi\u1ec7u s\u00f3ng mang<\/strong>: Th\u00e0nh ph\u1ea7n n\u00e0y t\u1ea1o ra t\u00edn hi\u1ec7u s\u00f3ng mang \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ebf \u0111\u1ec3 mang d\u1eef li\u1ec7u s\u1ed1.<\/p>\n<\/li>\n

    2. \n

      B\u1ed9 chuy\u1ec3n \u0111\u1ed5i k\u1ef9 thu\u1eadt s\u1ed1 sang t\u01b0\u01a1ng t\u1ef1 (DAC)<\/strong>: DAC chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u s\u1ed1 th\u00e0nh t\u00edn hi\u1ec7u t\u01b0\u01a1ng t\u1ef1 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ebf tr\u00ean t\u00edn hi\u1ec7u s\u00f3ng mang.<\/p>\n<\/li>\n

    3. \n

      B\u1ed9 \u0111i\u1ec1u bi\u1ebfn<\/strong>: B\u1ed9 \u0111i\u1ec1u bi\u1ebfn k\u1ebft h\u1ee3p t\u00edn hi\u1ec7u s\u00f3ng mang v\u00e0 t\u00edn hi\u1ec7u t\u01b0\u01a1ng t\u1ef1 \u0111\u1ea1i di\u1ec7n cho d\u1eef li\u1ec7u s\u1ed1, t\u1ea1o ra t\u00edn hi\u1ec7u \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ebf.<\/p>\n<\/li>\n

    4. \n

      B\u1ed9 chuy\u1ec3n \u0111\u1ed5i t\u01b0\u01a1ng t\u1ef1 sang s\u1ed1 (ADC)<\/strong>: \u1ede \u0111\u1ea7u nh\u1eadn, ADC chuy\u1ec3n \u0111\u1ed5i t\u00edn hi\u1ec7u t\u01b0\u01a1ng t\u1ef1 \u0111\u1ebfn th\u00e0nh d\u1eef li\u1ec7u s\u1ed1.<\/p>\n<\/li>\n

    5. \n

      b\u1ed9 gi\u1ea3i \u0111i\u1ec1u ch\u1ebf<\/strong>: B\u1ed9 gi\u1ea3i \u0111i\u1ec1u ch\u1ebf t\u00e1ch d\u1eef li\u1ec7u s\u1ed1 kh\u1ecfi t\u00edn hi\u1ec7u \u0111\u00e3 \u0111i\u1ec1u ch\u1ebf, cho ph\u00e9p thi\u1ebft b\u1ecb nh\u1eadn s\u1eed d\u1ee5ng th\u00f4ng tin s\u1ed1.<\/p>\n<\/li>\n

    6. \n

      S\u1eeda l\u1ed7i v\u00e0 n\u00e9n d\u1eef li\u1ec7u<\/strong>: M\u1ed9t s\u1ed1 modem c\u00f2n bao g\u1ed3m c\u00e1c thu\u1eadt to\u00e1n s\u1eeda l\u1ed7i v\u00e0 n\u00e9n d\u1eef li\u1ec7u \u0111\u1ec3 n\u00e2ng cao hi\u1ec7u qu\u1ea3 v\u00e0 \u0111\u1ed9 tin c\u1eady truy\u1ec1n d\u1eef li\u1ec7u.<\/p>\n<\/li>\n<\/ol>\n

      Ph\u00e2n t\u00edch c\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a Modem<\/h2>\n

      Modem cung c\u1ea5p m\u1ed9t s\u1ed1 t\u00ednh n\u0103ng ch\u00ednh x\u00e1c \u0111\u1ecbnh hi\u1ec7u su\u1ea5t v\u00e0 kh\u1ea3 n\u0103ng s\u1eed d\u1ee5ng c\u1ee7a ch\u00fang:<\/p>\n

        \n
      1. \n

        T\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eef li\u1ec7u<\/strong>: Modem \u0111\u01b0\u1ee3c \u0111\u1eb7c tr\u01b0ng b\u1edfi t\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eef li\u1ec7u, \u0111\u01b0\u1ee3c \u0111o b\u1eb1ng bit tr\u00ean gi\u00e2y (bps) ho\u1eb7c ph\u1ed5 bi\u1ebfn h\u01a1n l\u00e0 t\u00ednh b\u1eb1ng kilobit tr\u00ean gi\u00e2y (Kbps) ho\u1eb7c megabit tr\u00ean gi\u00e2y (Mbps). T\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eef li\u1ec7u cao h\u01a1n cho ph\u00e9p truy\u1ec1n d\u1eef li\u1ec7u nhanh h\u01a1n, cho ph\u00e9p truy c\u1eadp nhanh h\u01a1n v\u00e0o c\u00e1c t\u00e0i nguy\u00ean tr\u1ef1c tuy\u1ebfn.<\/p>\n<\/li>\n

      2. \n

        Ki\u1ec3u k\u1ebft n\u1ed1i<\/strong>: Modem c\u00f3 th\u1ec3 h\u1ed7 tr\u1ee3 nhi\u1ec1u lo\u1ea1i k\u1ebft n\u1ed1i kh\u00e1c nhau, ch\u1eb3ng h\u1ea1n nh\u01b0 quay s\u1ed1, DSL (\u0110\u01b0\u1eddng d\u00e2y thu\u00ea bao k\u1ef9 thu\u1eadt s\u1ed1), c\u00e1p, c\u00e1p quang v\u00e0 kh\u00f4ng d\u00e2y. M\u1ed7i lo\u1ea1i k\u1ebft n\u1ed1i cung c\u1ea5p t\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eef li\u1ec7u v\u00e0 v\u00f9ng ph\u1ee7 s\u00f3ng kh\u00e1c nhau.<\/p>\n<\/li>\n

      3. \n

        Kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch<\/strong>: Modem ph\u1ea3i t\u01b0\u01a1ng th\u00edch v\u1edbi c\u00e1c ti\u00eau chu\u1ea9n li\u00ean l\u1ea1c \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng b\u1edfi c\u00e1c nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 internet (ISP) v\u00e0 c\u00e1c thi\u1ebft b\u1ecb m\u1ea1ng kh\u00e1c.<\/p>\n<\/li>\n

      4. \n

        S\u1eeda l\u1ed7i<\/strong>: Modem \u0111\u01b0\u1ee3c trang b\u1ecb c\u01a1 ch\u1ebf s\u1eeda l\u1ed7i c\u00f3 th\u1ec3 ph\u00e1t hi\u1ec7n v\u00e0 s\u1eeda c\u00e1c l\u1ed7i x\u1ea3y ra trong qu\u00e1 tr\u00ecnh truy\u1ec1n d\u1eef li\u1ec7u, \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a d\u1eef li\u1ec7u.<\/p>\n<\/li>\n

      5. \n

        N\u00e9n d\u1eef li\u1ec7u<\/strong>: N\u00e9n d\u1eef li\u1ec7u gi\u00fap gi\u1ea3m k\u00edch th\u01b0\u1edbc d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c truy\u1ec1n, t\u1ed1i \u01b0u h\u00f3a vi\u1ec7c s\u1eed d\u1ee5ng b\u0103ng th\u00f4ng v\u00e0 c\u1ea3i thi\u1ec7n hi\u1ec7u qu\u1ea3 truy\u1ec1n t\u1ea3i.<\/p>\n<\/li>\n

      6. \n

        B\u1ea3o v\u1ec7<\/strong>: Modem c\u00f3 th\u1ec3 tri\u1ec3n khai c\u00e1c t\u00ednh n\u0103ng b\u1ea3o m\u1eadt nh\u01b0 m\u00e3 h\u00f3a \u0111\u1ec3 b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u trong qu\u00e1 tr\u00ecnh truy\u1ec1n.<\/p>\n<\/li>\n<\/ol>\n

        C\u00e1c lo\u1ea1i Modem<\/h2>\n

        Modem c\u00f3 nhi\u1ec1u lo\u1ea1i kh\u00e1c nhau, m\u1ed7i lo\u1ea1i \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho c\u00e1c m\u1ee5c \u0111\u00edch v\u00e0 lo\u1ea1i k\u1ebft n\u1ed1i c\u1ee5 th\u1ec3. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 danh s\u00e1ch c\u00e1c lo\u1ea1i modem ph\u1ed5 bi\u1ebfn:<\/p>\n

          \n
        1. \n

          Modem quay s\u1ed1<\/strong>: C\u00e1c modem n\u00e0y s\u1eed d\u1ee5ng \u0111\u01b0\u1eddng d\u00e2y \u0111i\u1ec7n tho\u1ea1i th\u00f4ng th\u01b0\u1eddng \u0111\u1ec3 k\u1ebft n\u1ed1i internet. Ch\u00fang ph\u1ed5 bi\u1ebfn trong nh\u1eefng ng\u00e0y \u0111\u1ea7u c\u1ee7a Internet nh\u01b0ng ph\u1ea7n l\u1edbn \u0111\u00e3 tr\u1edf n\u00ean l\u1ed7i th\u1eddi do t\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eef li\u1ec7u ch\u1eadm (th\u01b0\u1eddng l\u00ean t\u1edbi 56 Kbps).<\/p>\n<\/li>\n

        2. \n

          Modem DSL<\/strong>: Modem DSL s\u1eed d\u1ee5ng \u0111\u01b0\u1eddng d\u00e2y \u0111i\u1ec7n tho\u1ea1i nh\u01b0ng cung c\u1ea5p t\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eef li\u1ec7u nhanh h\u01a1n modem quay s\u1ed1. Ch\u00fang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i cho c\u00e1c k\u1ebft n\u1ed1i internet d\u00e2n c\u01b0 v\u00e0 doanh nghi\u1ec7p nh\u1ecf.<\/p>\n<\/li>\n

        3. \n

          Modem c\u00e1p<\/strong>: Modem c\u00e1p s\u1eed d\u1ee5ng c\u00e1p \u0111\u1ed3ng tr\u1ee5c \u0111\u1ec3 cung c\u1ea5p truy c\u1eadp internet. Ch\u00fang cung c\u1ea5p t\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eef li\u1ec7u cao h\u01a1n so v\u1edbi modem DSL v\u00e0 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u1edf khu v\u1ef1c th\u00e0nh th\u1ecb v\u00e0 ngo\u1ea1i \u00f4.<\/p>\n<\/li>\n

        4. \n

          Modem s\u1ee3i quang<\/strong>: Modem c\u00e1p quang k\u1ebft n\u1ed1i v\u1edbi m\u1ea1ng c\u00e1p quang, cung c\u1ea5p kh\u1ea3 n\u0103ng truy c\u1eadp Internet c\u1ef1c nhanh. Ch\u00fang c\u00f3 kh\u1ea3 n\u0103ng cung c\u1ea5p t\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eef li\u1ec7u \u1edf ph\u1ea1m vi gigabit m\u1ed7i gi\u00e2y (Gbps).<\/p>\n<\/li>\n

        5. \n

          Modem kh\u00f4ng d\u00e2y<\/strong>: Modem kh\u00f4ng d\u00e2y s\u1eed d\u1ee5ng m\u1ea1ng di \u0111\u1ed9ng \u0111\u1ec3 cung c\u1ea5p k\u1ebft n\u1ed1i internet. Ch\u00fang ph\u1ed5 bi\u1ebfn cho c\u00e1c thi\u1ebft b\u1ecb di \u0111\u1ed9ng v\u00e0 \u1edf nh\u1eefng khu v\u1ef1c kh\u00f4ng th\u1ec3 k\u1ebft n\u1ed1i c\u00f3 d\u00e2y.<\/p>\n<\/li>\n<\/ol>\n

          C\u00e1ch s\u1eed d\u1ee5ng Modem, c\u00e1c v\u1ea5n \u0111\u1ec1 v\u00e0 gi\u1ea3i ph\u00e1p li\u00ean quan \u0111\u1ebfn vi\u1ec7c s\u1eed d\u1ee5ng<\/h2>\n

          C\u00e1c c\u00e1ch s\u1eed d\u1ee5ng Modem:<\/h3>\n
            \n
          1. \n

            K\u1ebft n\u1ed1i m\u1ea1ng Internet<\/strong>: C\u00f4ng d\u1ee5ng ch\u00ednh c\u1ee7a modem l\u00e0 k\u1ebft n\u1ed1i internet. Ch\u00fang cho ph\u00e9p c\u00e1c c\u00e1 nh\u00e2n v\u00e0 doanh nghi\u1ec7p truy c\u1eadp c\u00e1c t\u00e0i nguy\u00ean tr\u1ef1c tuy\u1ebfn, duy\u1ec7t c\u00e1c trang web, g\u1eedi email v\u00e0 tham gia v\u00e0o c\u00e1c ho\u1ea1t \u0111\u1ed9ng tr\u1ef1c tuy\u1ebfn kh\u00e1c nhau.<\/p>\n<\/li>\n

          2. \n

            L\u00e0m vi\u1ec7c t\u1eeb xa<\/strong>: Modem \u0111\u00f3ng m\u1ed9t vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c t\u1ea1o \u0111i\u1ec1u ki\u1ec7n thu\u1eadn l\u1ee3i cho c\u00f4ng vi\u1ec7c t\u1eeb xa b\u1eb1ng c\u00e1ch cho ph\u00e9p nh\u00e2n vi\u00ean k\u1ebft n\u1ed1i v\u1edbi m\u1ea1ng v\u00e0 h\u1ec7 th\u1ed1ng n\u01a1i l\u00e0m vi\u1ec7c c\u1ee7a h\u1ecd \u1edf nh\u00e0.<\/p>\n<\/li>\n

          3. \n

            Ch\u01a1i game tr\u1ef1c tuy\u1ebfn<\/strong>: Game th\u1ee7 s\u1eed d\u1ee5ng modem \u0111\u1ec3 truy c\u1eadp v\u00e0o n\u1ec1n t\u1ea3ng ch\u01a1i game tr\u1ef1c tuy\u1ebfn, cho ph\u00e9p h\u1ecd ch\u01a1i tr\u00f2 ch\u01a1i nhi\u1ec1u ng\u01b0\u1eddi ch\u01a1i v\u00e0 t\u01b0\u01a1ng t\u00e1c v\u1edbi nh\u1eefng ng\u01b0\u1eddi ch\u01a1i kh\u00e1c trong th\u1eddi gian th\u1ef1c.<\/p>\n<\/li>\n

          4. \n

            \u00c2m thanh giao ti\u1ebfp<\/strong>: Modem tr\u01b0\u1edbc \u0111\u00e2y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 li\u00ean l\u1ea1c b\u1eb1ng gi\u1ecdng n\u00f3i qua \u0111\u01b0\u1eddng d\u00e2y \u0111i\u1ec7n tho\u1ea1i, nh\u01b0ng \u0111i\u1ec1u n\u00e0y ph\u1ea7n l\u1edbn \u0111\u00e3 \u0111\u01b0\u1ee3c thay th\u1ebf b\u1eb1ng c\u00f4ng ngh\u1ec7 Giao th\u1ee9c Tho\u1ea1i qua Internet (VoIP).<\/p>\n<\/li>\n<\/ol>\n

            C\u00e1c v\u1ea5n \u0111\u1ec1 v\u00e0 gi\u1ea3i ph\u00e1p li\u00ean quan \u0111\u1ebfn vi\u1ec7c s\u1eed d\u1ee5ng Modem:<\/h3>\n
              \n
            1. \n

              T\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eef li\u1ec7u ch\u1eadm<\/strong>: \u1ede nh\u1eefng khu v\u1ef1c m\u00e0 t\u00f9y ch\u1ecdn b\u0103ng th\u00f4ng r\u1ed9ng t\u1ed1c \u0111\u1ed9 cao b\u1ecb h\u1ea1n ch\u1ebf, ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 g\u1eb7p ph\u1ea3i t\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eef li\u1ec7u ch\u1eadm, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn tr\u1ea3i nghi\u1ec7m tr\u1ef1c tuy\u1ebfn c\u1ee7a h\u1ecd. Gi\u1ea3i ph\u00e1p cho v\u1ea5n \u0111\u1ec1 n\u00e0y l\u00e0 kh\u00e1m ph\u00e1 c\u00e1c lo\u1ea1i k\u1ebft n\u1ed1i thay th\u1ebf ho\u1eb7c \u0111\u1ea7u t\u01b0 n\u00e2ng c\u1ea5p c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng.<\/p>\n<\/li>\n

            2. \n

              Nh\u1eefng v\u1ea5n \u0111\u1ec1 t\u01b0\u01a1ng th\u00edch<\/strong>: M\u1ed9t s\u1ed1 modem c\u00f3 th\u1ec3 kh\u00f4ng t\u01b0\u01a1ng th\u00edch v\u1edbi m\u1ed9t s\u1ed1 ISP ho\u1eb7c thi\u1ebft b\u1ecb m\u1ea1ng nh\u1ea5t \u0111\u1ecbnh. Vi\u1ec7c \u0111\u1ea3m b\u1ea3o r\u1eb1ng modem h\u1ed7 tr\u1ee3 c\u00e1c ti\u00eau chu\u1ea9n v\u00e0 giao th\u1ee9c b\u1eaft bu\u1ed9c c\u00f3 th\u1ec3 gi\u1ea3i quy\u1ebft c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch.<\/p>\n<\/li>\n

            3. \n

              Gi\u1ea3m k\u1ebft n\u1ed1i<\/strong>: Modem c\u00f3 th\u1ec3 g\u1eb7p hi\u1ec7n t\u01b0\u1ee3ng m\u1ea5t k\u1ebft n\u1ed1i kh\u00f4ng li\u00ean t\u1ee5c, l\u00e0m gi\u00e1n \u0111o\u1ea1n vi\u1ec7c truy c\u1eadp Internet. Kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 c\u1ee7a modem, ki\u1ec3m tra s\u1ef1 c\u1ed1 \u0111\u01b0\u1eddng truy\u1ec1n v\u1eadt l\u00fd ho\u1eb7c li\u00ean h\u1ec7 v\u1edbi ISP \u0111\u1ec3 \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 c\u00f3 th\u1ec3 gi\u00fap gi\u1ea3i quy\u1ebft s\u1ef1 c\u1ed1 n\u00e0y.<\/p>\n<\/li>\n

            4. \n

              M\u1ed1i quan t\u00e2m v\u1ec1 b\u1ea3o m\u1eadt<\/strong>: Gi\u1ed1ng nh\u01b0 b\u1ea5t k\u1ef3 thi\u1ebft b\u1ecb k\u1ebft n\u1ed1i Internet n\u00e0o, modem d\u1ec5 b\u1ecb \u0111e d\u1ecda v\u1ec1 b\u1ea3o m\u1eadt. Th\u01b0\u1eddng xuy\u00ean c\u1eadp nh\u1eadt ch\u01b0\u01a1ng tr\u00ecnh c\u01a1 s\u1edf v\u00e0 tri\u1ec3n khai c\u00e1c t\u00ednh n\u0103ng b\u1ea3o m\u1eadt nh\u01b0 m\u00e3 h\u00f3a c\u00f3 th\u1ec3 gi\u1ea3m thi\u1ec3u r\u1ee7i ro b\u1ea3o m\u1eadt.<\/p>\n<\/li>\n<\/ol>\n

              C\u00e1c \u0111\u1eb7c \u0111i\u1ec3m ch\u00ednh v\u00e0 so s\u00e1nh kh\u00e1c v\u1edbi c\u00e1c thu\u1eadt ng\u1eef t\u01b0\u01a1ng t\u1ef1 d\u01b0\u1edbi d\u1ea1ng b\u1ea3ng v\u00e0 danh s\u00e1ch<\/h2>\n\n\n\n\n\n\n\n\n\n\n
              \u0111\u1eb7c tr\u01b0ng<\/th>\nModem<\/th>\nB\u1ed9 \u0111\u1ecbnh tuy\u1ebfn<\/th>\n<\/tr>\n<\/thead>\n
              Ch\u1ee9c n\u0103ng ch\u00ednh<\/td>\n\u0110i\u1ec1u ch\u1ebf v\u00e0 gi\u1ea3i \u0111i\u1ec1u ch\u1ebf t\u00edn hi\u1ec7u \u0111\u1ec3 truy\u1ec1n d\u1eef li\u1ec7u<\/td>\n\u0110\u1ecbnh tuy\u1ebfn c\u00e1c g\u00f3i d\u1eef li\u1ec7u gi\u1eefa c\u00e1c thi\u1ebft b\u1ecb trong m\u1ea1ng<\/td>\n<\/tr>\n
              Ki\u1ec3u k\u1ebft n\u1ed1i<\/td>\nC\u00e1c lo\u1ea1i kh\u00e1c nhau (DSL, C\u00e1p, C\u00e1p quang, Kh\u00f4ng d\u00e2y, v.v.)<\/td>\nC\u00f3 d\u00e2y ho\u1eb7c kh\u00f4ng d\u00e2y (Wi-Fi)<\/td>\n<\/tr>\n
              C\u00e1ch s\u1eed d\u1ee5ng<\/td>\nK\u1ebft n\u1ed1i v\u1edbi internet v\u00e0 c\u00e1c m\u1ea1ng truy\u1ec1n th\u00f4ng kh\u00e1c<\/td>\nT\u1ea1o v\u00e0 qu\u1ea3n l\u00fd m\u1ea1ng c\u1ee5c b\u1ed9 (LAN)<\/td>\n<\/tr>\n
              T\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eef li\u1ec7u<\/td>\nC\u00f3 th\u1ec3 thay \u0111\u1ed5i (v\u00ed d\u1ee5: l\u00ean t\u1edbi Mbps cho modem b\u0103ng th\u00f4ng r\u1ed9ng)<\/td>\nTh\u01b0\u1eddng \u0111\u01b0\u1ee3c \u0111o b\u1eb1ng Mbps ho\u1eb7c Gbps<\/td>\n<\/tr>\n
              V\u1ecb tr\u00ed thi\u1ebft b\u1ecb<\/td>\nTh\u01b0\u1eddng \u0111\u01b0\u1ee3c \u0111\u1eb7t t\u1ea1i c\u01a1 s\u1edf c\u1ee7a ng\u01b0\u1eddi d\u00f9ng<\/td>\nV\u1ecb tr\u00ed t\u1eadp trung trong m\u1ea1ng<\/td>\n<\/tr>\n
              V\u00ed d\u1ee5<\/td>\nModem c\u00e1p, Modem DSL, Modem c\u00e1p quang, Modem kh\u00f4ng d\u00e2y<\/td>\nB\u1ed9 \u0111\u1ecbnh tuy\u1ebfn gia \u0111\u00ecnh, B\u1ed9 \u0111\u1ecbnh tuy\u1ebfn doanh nghi\u1ec7p<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

              Tri\u1ec3n v\u1ecdng v\u00e0 c\u00f4ng ngh\u1ec7 c\u1ee7a t\u01b0\u01a1ng lai li\u00ean quan \u0111\u1ebfn Modem<\/h2>\n

              Khi c\u00f4ng ngh\u1ec7 ti\u1ebfn b\u1ed9, vai tr\u00f2 c\u1ee7a modem truy\u1ec1n th\u1ed1ng trong c\u00e1c \u1ee9ng d\u1ee5ng h\u01b0\u1edbng t\u1edbi ng\u01b0\u1eddi ti\u00eau d\u00f9ng c\u00f3 th\u1ec3 s\u1ebd gi\u1ea3m \u0111i h\u01a1n n\u1eefa. C\u00e1c c\u00f4ng ngh\u1ec7 b\u0103ng th\u00f4ng r\u1ed9ng t\u1ed1c \u0111\u1ed9 cao, ch\u1eb3ng h\u1ea1n nh\u01b0 m\u1ea1ng c\u00e1p quang v\u00e0 vi\u1ec7c \u00e1p d\u1ee5ng r\u1ed9ng r\u00e3i 5G v\u00e0 h\u01a1n th\u1ebf n\u1eefa s\u1ebd cho ph\u00e9p k\u1ebft n\u1ed1i Internet nhanh h\u01a1n v\u00e0 \u0111\u00e1ng tin c\u1eady h\u01a1n, gi\u1ea3m nhu c\u1ea7u v\u1ec1 modem truy\u1ec1n th\u1ed1ng \u1edf nhi\u1ec1u khu v\u1ef1c.<\/p>\n

              Tuy nhi\u00ean, modem v\u1eabn c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng trong c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p chuy\u00ean bi\u1ec7t, n\u01a1i c\u00e1c k\u00eanh truy\u1ec1n th\u00f4ng analog v\u1eabn r\u1ea5t c\u1ea7n thi\u1ebft. Ngo\u00e0i ra, nh\u1eefng ti\u1ebfn b\u1ed9 trong truy\u1ec1n th\u00f4ng v\u1ec7 tinh v\u00e0 k\u1ebft n\u1ed1i t\u1eeb xa c\u00f3 th\u1ec3 th\u1ea5y modem \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong th\u00e1m hi\u1ec3m kh\u00f4ng gian v\u00e0 c\u00e1c v\u00f9ng s\u00e2u v\u00f9ng xa.<\/p>\n

              C\u00e1ch s\u1eed d\u1ee5ng ho\u1eb7c li\u00ean k\u1ebft m\u00e1y ch\u1ee7 proxy v\u1edbi Modem<\/h2>\n

              M\u00e1y ch\u1ee7 proxy v\u00e0 modem ph\u1ee5c v\u1ee5 c\u00e1c ch\u1ee9c n\u0103ng kh\u00e1c nhau trong giao ti\u1ebfp internet, nh\u01b0ng ch\u00fang c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c li\u00ean k\u1ebft trong m\u1ed9t s\u1ed1 b\u1ed1i c\u1ea3nh nh\u1ea5t \u0111\u1ecbnh. M\u00e1y ch\u1ee7 proxy ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t trung gian gi\u1eefa thi\u1ebft b\u1ecb c\u1ee7a ng\u01b0\u1eddi d\u00f9ng v\u00e0 internet. N\u00f3 c\u00f3 th\u1ec3 n\u00e2ng cao t\u00ednh b\u1ea3o m\u1eadt, quy\u1ec1n ri\u00eang t\u01b0 v\u00e0 hi\u1ec7u su\u1ea5t b\u1eb1ng c\u00e1ch l\u01b0u n\u1ed9i dung v\u00e0o b\u1ed9 nh\u1edb \u0111\u1ec7m, ch\u1eb7n c\u00e1c trang web \u0111\u1ed9c h\u1ea1i v\u00e0 \u1ea9n \u0111\u1ecba ch\u1ec9 IP c\u1ee7a ng\u01b0\u1eddi d\u00f9ng.<\/p>\n

              Trong m\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p, ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 k\u1ebft n\u1ed1i Internet th\u00f4ng qua m\u00e1y ch\u1ee7 proxy \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p v\u1edbi modem. S\u1ef1 k\u1ebft h\u1ee3p n\u00e0y c\u00f3 th\u1ec3 cung c\u1ea5p th\u00eam c\u00e1c t\u00ednh n\u0103ng b\u1ea3o m\u1eadt v\u00e0 l\u1ecdc n\u1ed9i dung, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong c\u00e1c m\u1ea1ng c\u00f4ng ty. Tuy nhi\u00ean, vi\u1ec7c s\u1eed d\u1ee5ng m\u00e1y ch\u1ee7 proxy kh\u00f4ng ph\u1ee5 thu\u1ed9c v\u00e0o lo\u1ea1i modem ho\u1eb7c k\u1ebft n\u1ed1i \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 truy c\u1eadp internet.<\/p>\n

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

              \u0110\u1ec3 bi\u1ebft th\u00eam th\u00f4ng tin v\u1ec1 Modem, h\u00e3y xem x\u00e9t kh\u00e1m ph\u00e1 c\u00e1c t\u00e0i nguy\u00ean sau:<\/p>\n

                \n
              1. HowStuffWorks \u2013 C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a Modem<\/a><\/li>\n
              2. PCMag \u2013 Modem t\u1ed1t nh\u1ea5t cho n\u0103m 2023<\/a><\/li>\n
              3. TechTerms \u2013 \u0110\u1ecbnh ngh\u0129a modem<\/a><\/li>\n
              4. FCC \u2013 H\u01b0\u1edbng d\u1eabn ng\u01b0\u1eddi ti\u00eau d\u00f9ng v\u1ec1 modem<\/a><\/li>\n<\/ol>\n

                T\u00f3m l\u1ea1i, modem l\u00e0 c\u00f4ng c\u1ee5 gi\u00fap thu h\u1eb9p kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c thi\u1ebft b\u1ecb k\u1ef9 thu\u1eadt s\u1ed1 v\u00e0 m\u1ea1ng truy\u1ec1n th\u00f4ng analog trong nhi\u1ec1u th\u1eadp k\u1ef7. M\u1eb7c d\u00f9 s\u1ef1 n\u1ed5i b\u1eadt c\u1ee7a ch\u00fang c\u00f3 th\u1ec3 suy gi\u1ea3m do s\u1ef1 ra \u0111\u1eddi c\u1ee7a c\u00f4ng ngh\u1ec7 b\u0103ng th\u00f4ng r\u1ed9ng t\u1ed1c \u0111\u1ed9 cao, nh\u01b0ng modem s\u1ebd ti\u1ebfp t\u1ee5c t\u00ecm th\u1ea5y c\u00e1c \u1ee9ng d\u1ee5ng trong c\u00e1c ng\u00e0nh c\u1ee5 th\u1ec3 v\u00e0 c\u00e1c t\u00ecnh hu\u1ed1ng truy\u1ec1n th\u00f4ng chuy\u00ean bi\u1ec7t. Khi c\u00f4ng ngh\u1ec7 ti\u1ebfn b\u1ed9, s\u1ef1 ph\u00e1t tri\u1ec3n v\u00e0 t\u00edch h\u1ee3p c\u1ee7a modem v\u1edbi c\u00e1c thi\u1ebft b\u1ecb li\u00ean l\u1ea1c kh\u00e1c ch\u1eafc ch\u1eafn s\u1ebd \u0111\u1ecbnh h\u00ecnh t\u01b0\u01a1ng lai c\u1ee7a k\u1ebft n\u1ed1i k\u1ef9 thu\u1eadt s\u1ed1.<\/p>","protected":false},"featured_media":468937,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-478048","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about Modem: Bridging the Digital Divide<\/mark>","faq_items":[{"question":"What is a modem, and how does it work?","answer":"

                A modem, short for \"modulator-demodulator,\" is a device that facilitates the transmission of digital data over analog communication channels, such as telephone lines. It converts digital data from computers into analog signals for transmission and vice versa. The modem's modulation process alters the carrier signal to represent digital data, while the demodulation process extracts digital data from the incoming analog signals.<\/p>"},{"question":"What is the history of modems?","answer":"

                The concept of modulating and demodulating signals dates back to the early 1940s, but significant developments began in the 1950s. The Bell Labs introduced the \"Modem 1B\" in 1958, capable of transmitting data at 110 bits per second (bps). Over time, modem technology evolved, leading to the widespread adoption of the internet.<\/p>"},{"question":"What are the key features of modems?","answer":"

                Modems offer essential features that determine their performance and usability. These include data transfer speed, connection type (DSL, Cable, Fiber, etc.), compatibility with ISPs and networking equipment, error correction, data compression, and security measures like encryption.<\/p>"},{"question":"What are the types of modems available?","answer":"

                Various types of modems cater to specific needs and connection types. Common modem types include Dial-Up Modems (obsolete), DSL Modems, Cable Modems, Fiber Modems, and Wireless Modems.<\/p>"},{"question":"How can modems be used, and what are the potential problems?","answer":"

                Modems are primarily used for internet connectivity, remote work, online gaming, and voice communication. Users might face problems like slow data transfer speeds, compatibility issues, connection drops, and security concerns. Troubleshooting, upgrading infrastructure, and implementing security measures can help resolve these issues.<\/p>"},{"question":"How do modems compare to routers?","answer":"

                Modems and routers serve different functions, with modems facilitating data transmission and routers managing local area networks (LANs). Modems connect to the internet, while routers route data packets between devices in a network.<\/p>"},{"question":"What does the future hold for modems?","answer":"

                As technology advances, traditional modems may see decreased usage in consumer applications due to the rise of high-speed broadband and wireless technologies. However, they may still find applications in specialized industries and remote areas.<\/p>"},{"question":"How are proxy servers associated with modems?","answer":"

                Proxy servers and modems can be associated in certain contexts. While modems enable internet connectivity, proxy servers act as intermediaries between users and the internet. Some users may connect to the internet through a modem integrated with a proxy server, providing additional security and content filtering features. However, the use of proxy servers is independent of the modem type or connection.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/478048","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\/478048\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media\/468937"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media?parent=478048"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}