一、因特网与TCP—因特网的协议 二、DNS 三、TCP、UDP

Chapter Overview: understand principles transport layer services behind transport layer 0multiplexing/demultiplexing services: 0connectionless transport: UDP multiplexing/demultiplex

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

一、信道 二、传输媒体 三、编码 四、多路复用 五、数据交换技术 六、差错控制

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

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

广东财经大学：人力资源学院《网络心理学》课程教学大纲

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

IP datagram format IP protocol version 32 bits Imber total datagram header lenath lver/head pe length(bytes) (bytes) Hlen service