The TCP/P Protocol Suite Transmission Control Protocol Internet protocol Developed by darPa to connect Universities and Research Labs Four Layer model Applications Telnet, FTP, email, etc Transport TCP, UDP Network IP ICMP, IGMP Link
NAT(Network Address Translation)即网络地址转换,将局域网内的私有 IP 地址转换 成 Internet 上公有的 IP 地址,反之亦然。 代理服务是指:由一台拥有公有 IP 地址的主机,代替若干台没有公有 IP 地址的主机, 和 Internet 上的其他主机打交道,提供代理服务的这台机器称为代理服务器
Chapter FourA The Internet Unit们 Part 1 Notes to Text Part4 Extensive Reading Part 2 Word Study Part5 Notes to Passage Part3 Practice on Text Part6 Practice on Passage