2. 计算机
  3. (71) is a one -way function that takes an arbitrarily long piece of plaintext and from it computes a fixed-length bit string.

(71) is a one -way function that takes an arbitrarily long piece of plaintext and from it computes a fixed-length bit string.

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问题 (71) is a one -way function that takes an arbitrarily long piece of plaintext and from it computes a fixed-length bit string.
     (72) is a protocol that most USENET machines now use it to allow news articles to propagate from one machine to another over a reliable connection.
     (73) is an approach preferred by cable TV providers. In this solution the fiber terminates at an optoelectrical converter and the final segment is a shared coaxial cable.
     (74) is a device used to connect two separate network that use different communication protocol.
     (75) is a digital-to-digital polar encoding method in which the signal level is always either positive or negative.
选项 A、ADSL
B、FTTC
C、HFC
D、FTTH
答案C
解析
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