? 描述网络和网络互联，解释它们的作用

? 简要讨论TCP/IP协议栈，IP地址，协议端口，因特网服务和应用

? 解释什么是客户/服务器软件模型，它如何工作

? 讨论各种用于电子通信，远程登录，文件传输，远程命令执行，以及状态报告的网络软件工具

? 简要描述安全shell

? 覆盖如下命令和原语：finger, ftp, ifconfig, nslookup, ping, rcp, rlogin, rsh, ruptime, rusers, rwho, talk, telnet, traceroute-? describe networks and network interconnection, to explain their role ? brief discussion of TCP/IP protocol stack, IP address, protocol port, Internet services and applications ? explain what is a client/server software model, discuss how it works for ? e communications, remote login, file transfer, remote command execution, and status reporting network security software tools shell ? ? brief descr iption of the coverage the following commands and primitives: finger, ftp, ifconfig, nslookup, ping, rcp, rlogin, rsh, ruptime, rusers, rwho, talk, telnet, traceroute