Remote administration types are an example of one kind of(71)malicious software, the Trojan horse, or more simply Trojan. The pu

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问题    Remote administration types are an example of one kind of(71)malicious software, the Trojan horse, or more simply Trojan. The purpose of these programs isn’t replication,(72)to penetrate and control. That masquerade as one thing when in fact they are something else, usually something destructive. There are a number of kinds of Trojans, including spybots,   (73) report on the Web sites a computer user visits, and keybots or keyloggers, which record and report the user’s keystrokes in order to discover passwords and other confidential information.
   RATS attempt to give a remote intruder administrative control of an infected computer. They work as(74)pairs. The server resides on the infected machine, while the client resides elsewhere, across the network, where it’s available to a remote intruder. Using standard TCP/IP or UDP protocols, the client sends instructions to the server. The server does(75) it’s told to do on the infected computer.

选项 A、that
B、what
C、which
D、those

答案B

解析 这是一篇关于远程管理病毒(RATS)的短文,译文如下:远程管理病毒是一类非病毒性恶意软件——特洛伊木马(或更简单地称做木马)的例子。这些程序的目的不是复制,而是渗透进去并加以控制。它们伪装成某种东西,但实际上是另一种东西,通常具有破坏性。有多种类型的木马病毒,其中包括间谍机器人(它报告计算机用户访问的网站)以及击键机器人(它记录和报告用户的击键),目的是为了发现口令和其他的保密信息。RAT病毒企图让远程入侵者以管理员身份控制被感染的计算机。它们以客户机/服务器的方式工作。服务器端程序驻留在那些受感染的机器上,而客户端程序位于网络上能实施远程入侵的其他电脑上。客户端程序利用标准的TCP/IP或UDP协议给服务器端程序发送指令,使得服务器端程序在受感染的计算机上做相应的操作。
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