题目内容

● 为增强访问网页的安全性，可以采用_(15)_协议；为证明数据发送者的身份与数据的真实性需使用_(16)_。
(15)A．Telnet B．POP3 C．HTTPS D．DNS
(16)A．散列算法 B．时间戳 C．数字信封 D．加密算法

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（72）A. 64 B. 128 C. 255 D. 256
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（73）A. trying B. checking C. testing D. coding
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（74）A. an image B. a file C. a window D. a page
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