(56)is a one-way function that takes an arbitrarily long piece of plaintext and from it computes a fixed-length bit string.(57)i

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问题 (56)is a one-way function that takes an arbitrarily long piece of plaintext and from it computes a fixed-length bit string.(57)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.(58)is an approach preferred by cable TV providers. In this solution the fiber terminates at an opto-electrical converter and the final segment is a shared coaxial cable.(59)is a device used to connect two separate network that use different communication protocol.(60)is a digital-to-digital polar encoding method in which the signal level is always either positive or negative.

选项 A、RTP
B、RTTP
C、FTP
D、NNTP

答案D

解析 是一种协议,现在大多数USENET新闻网设备利用它通过可靠的连接将新闻文章从一台设备传播到另一台设备。
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