{"id":478341,"date":"2023-08-09T09:31:18","date_gmt":"2023-08-09T09:31:18","guid":{"rendered":""},"modified":"2023-09-05T11:16:35","modified_gmt":"2023-09-05T11:16:35","slug":"parity-check","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/vn\/wiki\/parity-check\/","title":{"rendered":"Ki\u1ec3m tra ch\u1eb5n l\u1ebb"},"content":{"rendered":"

Ki\u1ec3m tra t\u00ednh ch\u1eb5n l\u1ebb l\u00e0 ph\u01b0\u01a1ng ph\u00e1p \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ph\u00e1t hi\u1ec7n l\u1ed7i trong qu\u00e1 tr\u00ecnh truy\u1ec1n v\u00e0 l\u01b0u tr\u1eef d\u1eef li\u1ec7u, \u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n v\u00e0 \u0111\u1ed9 tin c\u1eady c\u1ee7a d\u1eef li\u1ec7u. N\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c h\u1ec7 th\u1ed1ng m\u00e1y t\u00ednh, giao th\u1ee9c truy\u1ec1n th\u00f4ng v\u00e0 thi\u1ebft b\u1ecb l\u01b0u tr\u1eef kh\u00e1c nhau \u0111\u1ec3 x\u00e1c minh xem d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c truy\u1ec1n ho\u1eb7c l\u01b0u tr\u1eef c\u00f3 l\u1ed7i hay kh\u00f4ng. Kh\u00e1i ni\u1ec7m ki\u1ec3m tra t\u00ednh ch\u1eb5n l\u1ebb \u0111\u00e3 c\u00f3 t\u1eeb v\u00e0i th\u1eadp k\u1ef7 tr\u01b0\u1edbc v\u00e0 \u0111\u00e3 ph\u00e1t tri\u1ec3n theo th\u1eddi gian, \u0111\u00f3ng m\u1ed9t vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c duy tr\u00ec \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a d\u1eef li\u1ec7u trong m\u00f4i tr\u01b0\u1eddng c\u00f4ng ngh\u1ec7 hi\u1ec7n \u0111\u1ea1i.<\/p>\n

L\u1ecbch s\u1eed ngu\u1ed3n g\u1ed1c c\u1ee7a ki\u1ec3m tra ch\u1eb5n l\u1ebb v\u00e0 l\u1ea7n \u0111\u1ea7u ti\u00ean \u0111\u1ec1 c\u1eadp \u0111\u1ebfn n\u00f3<\/h2>\n

Ngu\u1ed3n g\u1ed1c c\u1ee7a ki\u1ec3m tra t\u00ednh ch\u1eb5n l\u1ebb c\u00f3 th\u1ec3 b\u1eaft ngu\u1ed3n t\u1eeb nh\u1eefng ng\u00e0y \u0111\u1ea7u c\u1ee7a m\u00e1y t\u00ednh khi l\u1ed7i d\u1eef li\u1ec7u ph\u1ed5 bi\u1ebfn h\u01a1n do h\u1ea1n ch\u1ebf v\u1ec1 ph\u1ea7n c\u1ee9ng. Kh\u00e1i ni\u1ec7m s\u1eed d\u1ee5ng s\u1ef1 d\u01b0 th\u1eeba \u0111\u1ec3 ph\u00e1t hi\u1ec7n l\u1ed7i l\u1ea7n \u0111\u1ea7u ti\u00ean \u0111\u01b0\u1ee3c \u0111\u1ec1 xu\u1ea5t b\u1edfi Richard W. Hamming v\u00e0o n\u0103m 1950. Hamming \u0111\u00e3 gi\u1edbi thi\u1ec7u c\u00e1i m\u00e0 ng\u00e0y nay \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u201cM\u00e3 Hamming\u201d, m\u1ed9t d\u1ea1ng m\u00e3 s\u1eeda l\u1ed7i s\u1eed d\u1ee5ng c\u00e1c bit ch\u1eb5n l\u1ebb \u0111\u1ec3 ph\u00e1t hi\u1ec7n v\u00e0 s\u1eeda c\u00e1c l\u1ed7i bit \u0111\u01a1n. trong d\u1eef li\u1ec7u. C\u00f4ng vi\u1ec7c c\u1ee7a \u00f4ng \u0111\u00e3 m\u1edf \u0111\u01b0\u1eddng cho s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a nhi\u1ec1u ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m tra t\u00ednh ch\u1eb5n l\u1ebb \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ng\u00e0y nay.<\/p>\n

Th\u00f4ng tin chi ti\u1ebft v\u1ec1 Ki\u1ec3m tra ch\u1eb5n l\u1ebb: M\u1edf r\u1ed9ng ch\u1ee7 \u0111\u1ec1<\/h2>\n

Ki\u1ec3m tra t\u00ednh ch\u1eb5n l\u1ebb d\u1ef1a tr\u00ean nguy\u00ean t\u1eafc th\u00eam c\u00e1c bit b\u1ed5 sung v\u00e0o d\u1eef li\u1ec7u \u0111\u1ec3 t\u1ea1o ra m\u1ed9t d\u1ea1ng d\u1ef1 ph\u00f2ng. C\u00e1c bit b\u1ed5 sung n\u00e0y, \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 bit ch\u1eb5n l\u1ebb, \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n theo c\u00e1ch \u0111\u1ea3m b\u1ea3o t\u1ed5ng s\u1ed1 bit \u0111\u01b0\u1ee3c \u0111\u1eb7t th\u00e0nh '1' trong t\u1eeb d\u1eef li\u1ec7u l\u00e0 ch\u1eb5n ho\u1eb7c l\u1ebb. Khi d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c truy\u1ec1n ho\u1eb7c l\u01b0u tr\u1eef, ng\u01b0\u1eddi nh\u1eadn c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c bit ch\u1eb5n l\u1ebb n\u00e0y \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh xem c\u00f3 b\u1ea5t k\u1ef3 l\u1ed7i n\u00e0o x\u1ea3y ra trong qu\u00e1 tr\u00ecnh truy\u1ec1n ho\u1eb7c l\u01b0u tr\u1eef hay kh\u00f4ng.<\/p>\n

C\u00f3 hai lo\u1ea1i ki\u1ec3m tra t\u00ednh ch\u1eb5n l\u1ebb ch\u00ednh th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng:<\/p>\n

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    T\u00ednh ch\u1eb5n l\u1ebb:<\/strong> Trong ph\u01b0\u01a1ng ph\u00e1p n\u00e0y, t\u1ed5ng s\u1ed1 '1' trong t\u1eeb d\u1eef li\u1ec7u, bao g\u1ed3m c\u1ea3 bit ch\u1eb5n l\u1ebb, \u0111\u01b0\u1ee3c t\u00ednh ch\u1eb5n. N\u1ebfu x\u1ea3y ra m\u1ed9t l\u1ed7i bit trong qu\u00e1 tr\u00ecnh truy\u1ec1n ho\u1eb7c l\u01b0u tr\u1eef, ng\u01b0\u1eddi nh\u1eadn c\u00f3 th\u1ec3 ph\u00e1t hi\u1ec7n l\u1ed7i v\u00e0 y\u00eau c\u1ea7u truy\u1ec1n l\u1ea1i ho\u1eb7c th\u1ef1c hi\u1ec7n c\u00e1c bi\u1ec7n ph\u00e1p kh\u1eafc ph\u1ee5c.<\/p>\n<\/li>\n

  2. \n

    T\u00ednh ch\u1eb5n l\u1ebb l\u1ebb:<\/strong> Trong ph\u01b0\u01a1ng ph\u00e1p n\u00e0y, t\u1ed5ng s\u1ed1 '1' trong t\u1eeb d\u1eef li\u1ec7u, bao g\u1ed3m c\u1ea3 bit ch\u1eb5n l\u1ebb, \u0111\u01b0\u1ee3c t\u1ea1o th\u00e0nh s\u1ed1 l\u1ebb. Gi\u1ed1ng nh\u01b0 t\u00ednh ch\u1eb5n l\u1ebb, ph\u01b0\u01a1ng ph\u00e1p n\u00e0y cho ph\u00e9p ph\u00e1t hi\u1ec7n v\u00e0 s\u1eeda l\u1ed7i \u0111\u1ed1i v\u1edbi c\u00e1c l\u1ed7i bit \u0111\u01a1n.<\/p>\n<\/li>\n<\/ol>\n

    C\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a Ki\u1ec3m tra ch\u1eb5n l\u1ebb: C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a Ki\u1ec3m tra ch\u1eb5n l\u1ebb<\/h2>\n

    C\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a c\u01a1 ch\u1ebf ki\u1ec3m tra t\u00ednh ch\u1eb5n l\u1ebb kh\u00e1c nhau t\u00f9y thu\u1ed9c v\u00e0o \u1ee9ng d\u1ee5ng v\u00e0 ki\u1ebfn tr\u00fac h\u1ec7 th\u1ed1ng. N\u00f3i chung, ki\u1ec3m tra t\u00ednh ch\u1eb5n l\u1ebb bao g\u1ed3m c\u00e1c b\u01b0\u1edbc sau:<\/p>\n

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      Ph\u00e2n \u0111o\u1ea1n d\u1eef li\u1ec7u:<\/strong> D\u1eef li\u1ec7u \u0111\u01b0\u1ee3c truy\u1ec1n ho\u1eb7c l\u01b0u tr\u1eef \u0111\u01b0\u1ee3c chia th\u00e0nh c\u00e1c \u0111\u01a1n v\u1ecb nh\u1ecf h\u01a1n, th\u01b0\u1eddng \u1edf d\u1ea1ng t\u1eeb ho\u1eb7c kh\u1ed1i d\u1eef li\u1ec7u.<\/p>\n<\/li>\n

    2. \n

      T\u00ednh to\u00e1n bit ch\u1eb5n l\u1ebb:<\/strong> \u0110\u1ed1i v\u1edbi m\u1ed7i t\u1eeb d\u1eef li\u1ec7u, h\u1ec7 th\u1ed1ng t\u00ednh to\u00e1n (c\u00e1c) bit ch\u1eb5n l\u1ebb d\u1ef1a tr\u00ean ph\u01b0\u01a1ng ph\u00e1p ch\u1eb5n l\u1ebb \u0111\u00e3 ch\u1ecdn (ch\u1eb5n ho\u1eb7c l\u1ebb). Bit ch\u1eb5n l\u1ebb sau \u0111\u00f3 \u0111\u01b0\u1ee3c th\u00eam v\u00e0o t\u1eeb d\u1eef li\u1ec7u, t\u1ea1o ra t\u1eeb m\u00e3 ho\u00e0n ch\u1ec9nh.<\/p>\n<\/li>\n

    3. \n

      Truy\u1ec1n t\u1ea3i ho\u1eb7c l\u01b0u tr\u1eef:<\/strong> C\u00e1c t\u1eeb m\u00e3 \u0111\u01b0\u1ee3c g\u1eedi qua k\u00eanh li\u00ean l\u1ea1c ho\u1eb7c \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong thi\u1ebft b\u1ecb b\u1ed9 nh\u1edb.<\/p>\n<\/li>\n

    4. \n

      Ph\u00e1t hi\u1ec7n l\u1ed7i:<\/strong> Ng\u01b0\u1eddi nh\u1eadn d\u1eef li\u1ec7u ki\u1ec3m tra t\u00ednh ch\u1eb5n l\u1ebb c\u1ee7a t\u1eebng t\u1eeb nh\u1eadn \u0111\u01b0\u1ee3c. N\u1ebfu t\u00ednh ch\u1eb5n l\u1ebb kh\u00f4ng kh\u1edbp v\u1edbi gi\u00e1 tr\u1ecb mong \u0111\u1ee3i (ch\u1eb5n ho\u1eb7c l\u1ebb), l\u1ed7i s\u1ebd \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n.<\/p>\n<\/li>\n

    5. \n

      X\u1eed l\u00fd l\u1ed7i:<\/strong> Khi ph\u00e1t hi\u1ec7n l\u1ed7i, ng\u01b0\u1eddi nh\u1eadn c\u00f3 th\u1ec3 y\u00eau c\u1ea7u truy\u1ec1n l\u1ea1i d\u1eef li\u1ec7u ho\u1eb7c th\u1ef1c hi\u1ec7n c\u00e1c c\u01a1 ch\u1ebf kh\u1eafc ph\u1ee5c l\u1ed7i kh\u00e1c, t\u00f9y thu\u1ed9c v\u00e0o y\u00eau c\u1ea7u c\u1ee7a h\u1ec7 th\u1ed1ng.<\/p>\n<\/li>\n<\/ol>\n

      Ph\u00e2n t\u00edch c\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a Ki\u1ec3m tra ch\u1eb5n l\u1ebb<\/h2>\n

      Ki\u1ec3m tra t\u00ednh ch\u1eb5n l\u1ebb cung c\u1ea5p m\u1ed9t s\u1ed1 t\u00ednh n\u0103ng ch\u00ednh gi\u00fap n\u00f3 tr\u1edf th\u00e0nh m\u1ed9t c\u00f4ng c\u1ee5 c\u00f3 gi\u00e1 tr\u1ecb \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n d\u1eef li\u1ec7u:<\/p>\n

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        Th\u1ef1c hi\u1ec7n \u0111\u01a1n gi\u1ea3n:<\/strong> Ki\u1ec3m tra t\u00ednh ch\u1eb5n l\u1ebb t\u01b0\u01a1ng \u0111\u1ed1i d\u1ec5 th\u1ef1c hi\u1ec7n, y\u00eau c\u1ea7u t\u00e0i nguy\u00ean t\u00ednh to\u00e1n v\u00e0 ph\u1ea7n c\u1ee9ng t\u1ed1i thi\u1ec3u. S\u1ef1 \u0111\u01a1n gi\u1ea3n n\u00e0y l\u00e0m cho n\u00f3 tr\u1edf th\u00e0nh m\u1ed9t gi\u1ea3i ph\u00e1p ti\u1ebft ki\u1ec7m chi ph\u00ed \u0111\u1ec3 ph\u00e1t hi\u1ec7n l\u1ed7i.<\/p>\n<\/li>\n

      2. \n

        Ph\u00e1t hi\u1ec7n l\u1ed7i:<\/strong> Ki\u1ec3m tra t\u00ednh ch\u1eb5n l\u1ebb c\u00f3 th\u1ec3 ph\u00e1t hi\u1ec7n c\u00e1c l\u1ed7i bit \u0111\u01a1n m\u1ed9t c\u00e1ch \u0111\u00e1ng tin c\u1eady. Tuy nhi\u00ean, n\u00f3 kh\u00f4ng th\u1ec3 s\u1eeda l\u1ed7i m\u00e0 ch\u1ec9 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c s\u1ef1 hi\u1ec7n di\u1ec7n c\u1ee7a ch\u00fang.<\/p>\n<\/li>\n

      3. \n

        S\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i:<\/strong> Ki\u1ec3m tra t\u00ednh ch\u1eb5n l\u1ebb \u0111\u00e3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong nhi\u1ec1u th\u1eadp k\u1ef7 v\u00e0 v\u1eabn l\u00e0 m\u1ed9t ph\u1ea7n c\u01a1 b\u1ea3n c\u1ee7a k\u1ef9 thu\u1eadt ph\u00e1t hi\u1ec7n l\u1ed7i trong c\u00e1c \u1ee9ng d\u1ee5ng kh\u00e1c nhau.<\/p>\n<\/li>\n

      4. \n

        Tr\u00ean kh\u00f4ng:<\/strong> M\u1eb7c d\u00f9 ki\u1ec3m tra t\u00ednh ch\u1eb5n l\u1ebb cung c\u1ea5p kh\u1ea3 n\u0103ng ph\u00e1t hi\u1ec7n l\u1ed7i c\u00f3 gi\u00e1 tr\u1ecb nh\u01b0ng n\u00f3 \u0111i k\u00e8m v\u1edbi m\u1ed9t s\u1ed1 chi ph\u00ed v\u1ec1 s\u1ed1 bit b\u1ed5 sung c\u1ea7n thi\u1ebft cho t\u00ednh ch\u1eb5n l\u1ebb.<\/p>\n<\/li>\n

      5. \n

        S\u1eeda l\u1ed7i h\u1ea1n ch\u1ebf:<\/strong> Ki\u1ec3m tra t\u00ednh ch\u1eb5n l\u1ebb ch\u1ec9 c\u00f3 th\u1ec3 ph\u00e1t hi\u1ec7n v\u00e0 kh\u00f4ng s\u1eeda \u0111\u01b0\u1ee3c l\u1ed7i. \u0110\u1ec3 s\u1eeda l\u1ed7i m\u1ea1nh m\u1ebd h\u01a1n, c\u00e1c m\u00e3 ph\u1ee9c t\u1ea1p h\u01a1n nh\u01b0 m\u00e3 Reed-Solomon ho\u1eb7c BCH \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng.<\/p>\n<\/li>\n<\/ol>\n

        C\u00e1c lo\u1ea1i ki\u1ec3m tra ch\u1eb5n l\u1ebb<\/h2>\n\n\n\n\n\n\n
        Ki\u1ec3u<\/th>\nS\u1ef1 mi\u00eau t\u1ea3<\/th>\n<\/tr>\n<\/thead>\n
        Ch\u1eb5n l\u1ebb<\/td>\nT\u1ed5ng s\u1ed1 '1, bao g\u1ed3m c\u1ea3 bit ch\u1eb5n l\u1ebb, \u0111\u01b0\u1ee3c t\u1ea1o th\u00e0nh s\u1ed1 ch\u1eb5n.<\/td>\n<\/tr>\n
        Ch\u1eb5n l\u1ebb l\u1ebb<\/td>\nT\u1ed5ng s\u1ed1 '1, bao g\u1ed3m c\u1ea3 bit ch\u1eb5n l\u1ebb, \u0111\u01b0\u1ee3c t\u1ea1o th\u00e0nh s\u1ed1 l\u1ebb.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

        C\u00e1ch s\u1eed d\u1ee5ng Ki\u1ec3m tra ch\u1eb5n l\u1ebb, 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

        S\u1eed d\u1ee5ng Ki\u1ec3m tra t\u00ednh ch\u1eb5n l\u1ebb:<\/h3>\n
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          H\u1ec7 th\u1ed1ng b\u1ed9 nh\u1edb:<\/strong> Ki\u1ec3m tra t\u00ednh ch\u1eb5n l\u1ebb th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong h\u1ec7 th\u1ed1ng b\u1ed9 nh\u1edb m\u00e1y t\u00ednh \u0111\u1ec3 ph\u00e1t hi\u1ec7n l\u1ed7i trong d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong RAM.<\/p>\n<\/li>\n

        2. \n

          Giao th\u1ee9c truy\u1ec1n th\u00f4ng:<\/strong> Nhi\u1ec1u giao th\u1ee9c truy\u1ec1n th\u00f4ng, ch\u1eb3ng h\u1ea1n nh\u01b0 UART (B\u1ed9 thu\/ph\u00e1t kh\u00f4ng \u0111\u1ed3ng b\u1ed9 ph\u1ed5 qu\u00e1t), s\u1eed d\u1ee5ng ki\u1ec3m tra t\u00ednh ch\u1eb5n l\u1ebb \u0111\u1ec3 ph\u00e1t hi\u1ec7n l\u1ed7i trong qu\u00e1 tr\u00ecnh truy\u1ec1n d\u1eef li\u1ec7u.<\/p>\n<\/li>\n

        3. \n

          H\u1ec7 th\u1ed1ng RAID:<\/strong> C\u1ea5u h\u00ecnh M\u1ea3ng \u0110\u0129a \u0110\u1ed9c l\u1eadp D\u1ef1 ph\u00f2ng (RAID) th\u01b0\u1eddng s\u1eed d\u1ee5ng c\u00e1c k\u1ef9 thu\u1eadt ki\u1ec3m tra t\u00ednh ch\u1eb5n l\u1ebb \u0111\u1ec3 duy tr\u00ec t\u00ednh to\u00e0n v\u1eb9n d\u1eef li\u1ec7u tr\u00ean nhi\u1ec1u \u0111\u0129a.<\/p>\n<\/li>\n<\/ol>\n

          V\u1ea5n \u0111\u1ec1 v\u00e0 gi\u1ea3i ph\u00e1p:<\/h3>\n
            \n
          1. \n

            L\u1ed7i bit \u0111\u01a1n:<\/strong> Ki\u1ec3m tra t\u00ednh ch\u1eb5n l\u1ebb ch\u1ec9 c\u00f3 th\u1ec3 ph\u00e1t hi\u1ec7n c\u00e1c l\u1ed7i bit \u0111\u01a1n. \u0110\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng y\u00eau c\u1ea7u kh\u1ea3 n\u0103ng s\u1eeda l\u1ed7i cao h\u01a1n, ph\u1ea3i s\u1eed d\u1ee5ng c\u00e1c m\u00e3 s\u1eeda l\u1ed7i n\u00e2ng cao h\u01a1n.<\/p>\n<\/li>\n

          2. \n

            Tr\u00ean kh\u00f4ng:<\/strong> Vi\u1ec7c bao g\u1ed3m c\u00e1c bit ch\u1eb5n l\u1ebb l\u00e0m t\u0103ng k\u00edch th\u01b0\u1edbc d\u1eef li\u1ec7u t\u1ed5ng th\u1ec3, d\u1eabn \u0111\u1ebfn vi\u1ec7c s\u1eed d\u1ee5ng b\u0103ng th\u00f4ng cao h\u01a1n \u0111\u1ec3 truy\u1ec1n v\u00e0 y\u00eau c\u1ea7u b\u1ed9 nh\u1edb b\u1ed5 sung \u0111\u1ec3 l\u01b0u tr\u1eef. M\u00e3 s\u1eeda l\u1ed7i n\u00e2ng cao v\u1edbi chi ph\u00ed th\u1ea5p h\u01a1n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u01b0u ti\u00ean trong m\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p.<\/p>\n<\/li>\n

          3. \n

            L\u1ed7i nhi\u1ec1u bit:<\/strong> Ki\u1ec3m tra ch\u1eb5n l\u1ebb kh\u00f4ng c\u00f3 kh\u1ea3 n\u0103ng ph\u00e1t hi\u1ec7n nhi\u1ec1u l\u1ed7i bit x\u1ea3y ra trong c\u00f9ng m\u1ed9t t\u1eeb d\u1eef li\u1ec7u. \u0110\u1ec3 n\u00e2ng cao kh\u1ea3 n\u0103ng s\u1eeda l\u1ed7i, c\u1ea7n c\u00f3 c\u00e1c s\u01a1 \u0111\u1ed3 m\u00e3 h\u00f3a ph\u1ee9c t\u1ea1p h\u01a1n.<\/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<\/h2>\n\n\n\n\n\n\n\n\n
            Tham s\u1ed1<\/th>\nKi\u1ec3m tra ch\u1eb5n l\u1ebb<\/th>\nT\u1ed5ng ki\u1ec3m tra<\/th>\nM\u00e3 s\u1eeda l\u1ed7i<\/th>\n<\/tr>\n<\/thead>\n
            Ph\u00e1t hi\u1ec7n l\u1ed7i<\/td>\n\u0110\u00fang<\/td>\n\u0110\u00fang<\/td>\n\u0110\u00fang<\/td>\n<\/tr>\n
            S\u1eeda l\u1ed7i<\/td>\nKH\u00d4NG<\/td>\nKH\u00d4NG<\/td>\n\u0110\u00fang<\/td>\n<\/tr>\n
            Tr\u00ean kh\u00f4ng<\/td>\nTh\u1ea5p<\/td>\nTh\u1ea5p<\/td>\nBi\u1ebfn \u0111\u1ed5i<\/td>\n<\/tr>\n
            S\u1ef1 ph\u1ee9c t\u1ea1p c\u1ee7a vi\u1ec7c th\u1ef1c hi\u1ec7n<\/td>\nTh\u1ea5p<\/td>\nTh\u1ea5p<\/td>\nTrung b\u00ecnh \u0111\u1ebfn cao<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

            Quan \u0111i\u1ec3m v\u00e0 c\u00f4ng ngh\u1ec7 c\u1ee7a t\u01b0\u01a1ng lai li\u00ean quan \u0111\u1ebfn Ki\u1ec3m tra ch\u1eb5n l\u1ebb<\/h2>\n

            Trong khi ki\u1ec3m tra t\u00ednh ch\u1eb5n l\u1ebb ti\u1ebfp t\u1ee5c l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 quan tr\u1ecdng \u0111\u1ec3 ph\u00e1t hi\u1ec7n l\u1ed7i c\u01a1 b\u1ea3n, nh\u1eefng ti\u1ebfn b\u1ed9 trong c\u00f4ng ngh\u1ec7 \u0111\u00e3 d\u1eabn \u0111\u1ebfn c\u00e1c m\u00e3 s\u1eeda l\u1ed7i ph\u1ee9c t\u1ea1p h\u01a1n. C\u00e1c c\u00f4ng ngh\u1ec7 trong t\u01b0\u01a1ng lai c\u00f3 th\u1ec3 t\u1eadp trung v\u00e0o:<\/p>\n

              \n
            1. \n

              S\u1eeda l\u1ed7i n\u00e2ng cao:<\/strong> C\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u \u0111ang kh\u00e1m ph\u00e1 c\u00e1c s\u01a1 \u0111\u1ed3 m\u00e3 h\u00f3a m\u1edbi mang l\u1ea1i kh\u1ea3 n\u0103ng s\u1eeda l\u1ed7i cao h\u01a1n m\u00e0 kh\u00f4ng c\u1ea7n t\u1ed1n nhi\u1ec1u chi ph\u00ed.<\/p>\n<\/li>\n

            2. \n

              Ph\u01b0\u01a1ng ph\u00e1p ti\u1ebfp c\u1eadn lai:<\/strong> K\u1ebft h\u1ee3p nhi\u1ec1u k\u1ef9 thu\u1eadt ph\u00e1t hi\u1ec7n v\u00e0 s\u1eeda l\u1ed7i, ch\u1eb3ng h\u1ea1n nh\u01b0 s\u1eed d\u1ee5ng ki\u1ec3m tra t\u00ednh ch\u1eb5n l\u1ebb c\u00f9ng v\u1edbi t\u1ed5ng ki\u1ec3m tra ho\u1eb7c c\u00e1c m\u00e3 n\u00e2ng cao h\u01a1n, \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c kh\u1ea3 n\u0103ng x\u1eed l\u00fd l\u1ed7i m\u1ea1nh m\u1ebd.<\/p>\n<\/li>\n

            3. \n

              K\u1ef9 thu\u1eadt d\u1ef1a tr\u00ean m\u00e1y h\u1ecdc:<\/strong> S\u1eed d\u1ee5ng c\u00e1c thu\u1eadt to\u00e1n h\u1ecdc m\u00e1y \u0111\u1ec3 c\u1ea3i thi\u1ec7n quy tr\u00ecnh ph\u00e1t hi\u1ec7n v\u00e0 s\u1eeda l\u1ed7i trong c\u00e1c h\u1ec7 th\u1ed1ng d\u1eef li\u1ec7u ph\u1ee9c t\u1ea1p.<\/p>\n<\/li>\n<\/ol>\n

              C\u00e1ch s\u1eed d\u1ee5ng ho\u1eb7c li\u00ean k\u1ebft m\u00e1y ch\u1ee7 proxy v\u1edbi Ki\u1ec3m tra ch\u1eb5n l\u1ebb<\/h2>\n

              M\u00e1y ch\u1ee7 proxy \u0111\u00f3ng m\u1ed9t vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c \u0111\u1ecbnh tuy\u1ebfn v\u00e0 qu\u1ea3n l\u00fd l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp internet cho kh\u00e1ch h\u00e0ng. M\u1eb7c d\u00f9 m\u00e1y ch\u1ee7 proxy kh\u00f4ng \u0111\u01b0\u1ee3c li\u00ean k\u1ebft tr\u1ef1c ti\u1ebfp v\u1edbi ki\u1ec3m tra t\u00ednh ch\u1eb5n l\u1ebb nh\u01b0ng ch\u00fang c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c h\u01b0\u1edfng l\u1ee3i t\u1eeb kh\u1ea3 n\u0103ng ph\u00e1t hi\u1ec7n l\u1ed7i c\u1ee7a ki\u1ec3m tra t\u00ednh ch\u1eb5n l\u1ebb trong m\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p nh\u1ea5t \u0111\u1ecbnh:<\/p>\n

                \n
              1. \n

                B\u1ed9 nh\u1edb \u0111\u1ec7m d\u1eef li\u1ec7u:<\/strong> M\u00e1y ch\u1ee7 proxy th\u01b0\u1eddng l\u01b0u tr\u1eef d\u1eef li\u1ec7u t\u1eeb m\u00e1y ch\u1ee7 web m\u00e0 ch\u00fang t\u01b0\u01a1ng t\u00e1c. B\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng t\u00ednh n\u0103ng ki\u1ec3m tra t\u00ednh ch\u1eb5n l\u1ebb, m\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 x\u00e1c minh t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c l\u01b0u trong b\u1ed9 nh\u1edb \u0111\u1ec7m, \u0111\u1ea3m b\u1ea3o r\u1eb1ng m\u00e1y kh\u00e1ch nh\u1eadn \u0111\u01b0\u1ee3c th\u00f4ng tin ch\u00ednh x\u00e1c.<\/p>\n<\/li>\n

              2. \n

                Truy\u1ec1n d\u1eef li\u1ec7u:<\/strong> Trong tr\u01b0\u1eddng h\u1ee3p m\u00e1y ch\u1ee7 proxy chuy\u1ec3n ti\u1ebfp d\u1eef li\u1ec7u gi\u1eefa m\u00e1y kh\u00e1ch v\u00e0 m\u00e1y ch\u1ee7 web, proxy c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng t\u00ednh n\u0103ng ki\u1ec3m tra t\u00ednh ch\u1eb5n l\u1ebb \u0111\u1ec3 ph\u00e1t hi\u1ec7n l\u1ed7i trong qu\u00e1 tr\u00ecnh truy\u1ec1n v\u00e0 y\u00eau c\u1ea7u d\u1eef li\u1ec7u m\u1edbi n\u1ebfu c\u1ea7n.<\/p>\n<\/li>\n

              3. \n

                To\u00e0n v\u1eb9n d\u1eef li\u1ec7u:<\/strong> Ki\u1ec3m tra t\u00ednh ch\u1eb5n l\u1ebb c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng tr\u00ean c\u00e1c m\u00e1y ch\u1ee7 proxy \u0111\u1ec3 gi\u00e1m s\u00e1t t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a c\u00e1c t\u1ec7p c\u1ea5u h\u00ecnh v\u00e0 t\u1ec7p nh\u1eadt k\u00fd quan tr\u1ecdng nh\u1eb1m tr\u00e1nh m\u1ecdi nguy c\u01a1 h\u1ecfng d\u1eef li\u1ec7u.<\/p>\n<\/li>\n<\/ol>\n

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

                \u0110\u1ec3 bi\u1ebft th\u00eam th\u00f4ng tin v\u1ec1 Ki\u1ec3m tra ch\u1eb5n l\u1ebb, b\u1ea1n c\u00f3 th\u1ec3 tham kh\u1ea3o c\u00e1c t\u00e0i nguy\u00ean sau:<\/p>\n

                  \n
                1. M\u00e3 Hamming \u2013 Wikipedia<\/a><\/li>\n
                2. Ph\u00e1t hi\u1ec7n v\u00e0 s\u1eeda l\u1ed7i \u2013 GeeksforGeeks<\/a><\/li>\n
                3. RAID (M\u1ea3ng \u0111\u0129a \u0111\u1ed9c l\u1eadp d\u1ef1 ph\u00f2ng) \u2013 Techopedia<\/a><\/li>\n
                4. UART (B\u1ed9 thu\/ph\u00e1t kh\u00f4ng \u0111\u1ed3ng b\u1ed9 \u0111a n\u0103ng) \u2013 Electronics Hub<\/a><\/li>\n
                5. M\u00e3 Reed-Solomon \u2013 MathWorld<\/a><\/li>\n<\/ol>\n

                  T\u00f3m l\u1ea1i, ki\u1ec3m tra t\u00ednh ch\u1eb5n l\u1ebb l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p c\u01a1 b\u1ea3n \u0111\u1ec3 ph\u00e1t hi\u1ec7n l\u1ed7i, \u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n d\u1eef li\u1ec7u trong c\u00e1c h\u1ec7 th\u1ed1ng m\u00e1y t\u00ednh v\u00e0 truy\u1ec1n th\u00f4ng kh\u00e1c nhau. M\u1eb7c d\u00f9 c\u00f3 nh\u1eefng h\u1ea1n ch\u1ebf nh\u01b0ng n\u00f3 v\u1eabn ti\u1ebfp t\u1ee5c l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 c\u00f3 gi\u00e1 tr\u1ecb trong vi\u1ec7c duy tr\u00ec \u0111\u1ed9 ch\u00ednh x\u00e1c v\u00e0 \u0111\u1ed9 tin c\u1eady c\u1ee7a d\u1eef li\u1ec7u. Khi c\u00f4ng ngh\u1ec7 ti\u1ebfn b\u1ed9, ch\u00fang ta c\u00f3 th\u1ec3 mong \u0111\u1ee3i \u0111\u01b0\u1ee3c th\u1ea5y c\u00e1c k\u1ef9 thu\u1eadt s\u1eeda l\u1ed7i ph\u1ee9c t\u1ea1p h\u01a1n nh\u1eb1m b\u1ed5 sung ho\u1eb7c c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng ki\u1ec3m tra t\u00ednh ch\u1eb5n l\u1ebb trong c\u00e1c \u1ee9ng d\u1ee5ng trong t\u01b0\u01a1ng lai.<\/p>","protected":false},"featured_media":469116,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-478341","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about Parity Check: Ensuring Data Integrity and Reliability<\/mark>","faq_items":[{"question":"What is Parity check?","answer":"

                  Parity check is a method used to detect errors in data transmission and storage, ensuring data integrity and reliability. It involves adding extra bits to data to create redundancy, which helps in detecting errors during transmission or storage.<\/p>"},{"question":"Who first proposed the concept of Parity check?","answer":"

                  The concept of using redundancy to detect errors was first proposed by Richard W. Hamming in 1950. He introduced what is now known as \"Hamming code,\" a form of error-correcting code that uses parity bits to detect and correct single-bit errors in data.<\/p>"},{"question":"How does Parity check work?","answer":"

                  Parity check involves the following steps:<\/p>

                  1. Data Segmentation: Data is divided into smaller units, usually in the form of data words or blocks.<\/li>
                  2. Parity Bit Calculation: Parity bits are calculated for each data word based on the chosen parity method (even or odd).<\/li>
                  3. Transmission or Storage: Codewords, comprising the data word and parity bit, are sent over a communication channel or stored in a memory device.<\/li>
                  4. Error Detection: The recipient checks the parity of each received word to detect errors.<\/li>
                  5. Error Handling: Upon error detection, appropriate actions, such as retransmission or error recovery, can be taken.<\/li><\/ol>"},{"question":"What types of Parity check exist?","answer":"

                    There are two main types of Parity check:<\/p>

                    1. Even Parity: The total number of '1's, including the parity bit, is made even.<\/li>
                    2. Odd Parity: The total number of '1's, including the parity bit, is made odd.<\/li><\/ol>"},{"question":"What are the main characteristics of Parity check?","answer":"

                      Parity check offers several key features:<\/p>

                      1. Simple Implementation: It is relatively easy to implement, requiring minimal hardware and computational resources.<\/li>
                      2. Error Detection: It can reliably detect single-bit errors during transmission or storage.<\/li>
                      3. Widely Used: Parity check has been used for decades and remains a fundamental part of error detection techniques in various applications.<\/li>
                      4. Overhead: The inclusion of parity bits increases the overall data size, resulting in higher bandwidth usage for transmission and additional memory requirements for storage.<\/li>
                      5. Limited Error Correction: Parity check can only detect errors and not correct them.<\/li><\/ol>"},{"question":"How can proxy servers benefit from Parity check?","answer":"

                        Proxy servers can benefit from Parity check in the following ways:<\/p>

                        1. Data Caching: Proxy servers can verify the integrity of cached data using Parity check, ensuring clients receive accurate information.<\/li>
                        2. Data Transmission: Parity check helps detect errors during data transmission, allowing proxy servers to request fresh data if needed.<\/li>
                        3. Data Integrity: Proxy servers can use Parity check to monitor the integrity of critical configuration files and log files, preventing potential data corruption.<\/li><\/ol>"},{"question":"What are the future prospects and technologies related to Parity check?","answer":"

                          The future of Parity check may involve:<\/p>

                          1. Advanced Error Correction: Researchers are exploring new coding schemes with higher error correction capabilities and reduced overhead.<\/li>
                          2. Hybrid Approaches: Combining multiple error detection and correction techniques to achieve robust error handling.<\/li>
                          3. Machine Learning-Based Techniques: Utilizing machine learning algorithms to enhance error detection and correction processes in complex data systems.<\/li><\/ol>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/478341","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\/478341\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media\/469116"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media?parent=478341"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}