Network layer functions transport packet from sending to receiving hosts network layer protocols in physical every host, router data link physical data link

Chapter 7: Network security Foundations: what is security? crypfography authentication message integrity key distribution and certification Security in practice: application layer: secure e-mail

Summary of mac protocols What do you do with a shared media? Channel Partitioning by time, frequency or code Time Division, Code Division, Frequency Division Random partitioning dynamic

1建设目标 2需求分析 3校园网系统集成方案的规划设计 4校园网应用系统的集成实现 5校园网系统集成的特点分析

TCP segment structure 32 bits URG: urgent data (generally not used) source port #f dest port counting by bytes sequence number

Link Layer: setting the context actual PDu flow Router r1 applicatio pp lication transport trar sport network net vork data link

Assignment: read Part I: Introduction chapter 1 in text ur goa Overview: get contex↑ what's the Internet overview.\feel\of what's a protocol?

1、用户登录表单 用户登录界 面

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7.1 Intranet信息网站基础 7.2DNS服务器的建立与设置 7.3wwW和FTP服务器的建立与管理