work（）,systems that effectively isolate

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问题 work（）,systems that effectively isolate an organization's internal network structure from an （） network, such as the INTERNET is becoming increasingly popular. These firewall systems typically act as application-layer（请作答此空）between networks, usually offering controlled TELNET, FTP, and SMTP access. With the emergence of more sophisticated（）layer protocols designed to facilitate global information discovery , there exists a need to provide a general （）for these protocols to transparently and securely traverse a firewall.A.hostsB.routersC.gatewaysD.offices

选项 A.hosts
B.routers
C.gateways
D.offices

答案 C

解析掌握基本词汇，本题还是比较容易的。参考翻译如下：

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本试题收录于：初级网络管理员题库软件水平考试初中高级分类

初级网络管理员

软件水平考试初中高级

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