单选题
网络管理员
2010-04-14
请选择(4)处最佳答案

参考答案
B
答案解析
MD是一种将任意长度的无格式文本计算成某一固定长度比特串的单向函数。NNTP是大部分USENET机器用来允许新文章通过一个可靠连接从一个机器传输到另一个机器的协议。HFC是有线电视提供者有限选择的方法。在这个解决方案中光纤在光电转换器处停止而最后一段是共享的同轴电缆。网关是用来连接两个使用不同通信协议的单独网络的设备。NRZ是一种总是处于正极或负极的数字到数字的双极编码方法
你可能感兴趣的试题
2
根据下列题干,回答题
In the following essay, each blank has four choices.Choose the best answer and write down on the answer sheet.
Communicating via Email is by far the most common Internet activity.You can (1) with anyone in the world who has an Internet address or Email (2) with a system connection to the Internet.All you need is (3) the Internet and an Email program.Two of the most widely used Email programs are Microsoft's (4) and Netscape's Navigator.A typical Email message has three basic (5) : header, message, and signature.
请选择(1)处最佳答案
In the following essay, each blank has four choices.Choose the best answer and write down on the answer sheet.
Communicating via Email is by far the most common Internet activity.You can (1) with anyone in the world who has an Internet address or Email (2) with a system connection to the Internet.All you need is (3) the Internet and an Email program.Two of the most widely used Email programs are Microsoft's (4) and Netscape's Navigator.A typical Email message has three basic (5) : header, message, and signature.
请选择(1)处最佳答案

