一、网络互联概念 二、广域网技术 三、PsTN、ISDN、DDN、X.25、 四、帧中继FR、数字用户线xDSL

一、了解多媒体网络的应用要求 二、多媒体的网络应用

一、因特网:工程视角 数以百万计的互联计算设备

一、局域网的特点及关键技术 二、信道共享技术 三、以太网技术 四、高速局域网 五、虚拟局域网VLAN

一、概述、un、 Windows NT、 NetWare

一、什么是安全性? 二、密码术 三、报文鉴别

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

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

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

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