10.1 计算机网络综述 10.2 数据通信技术 10.3 计算机网络的体系结构 10.4 网络设备 10.5 网络软件 10.6 以太网安装设置 10.7 因特网

3.1 数据通信基础 3.2 传输介质 3.3 常见的物理层标准 3.4 常见物理层设备与组件 3.5 技能训练：网络线缆制作

一、数据通信 二、互联网接入 三、计算机网络的分类

数据通信基础&传输介质介绍（PPT讲义课件）

Outline Network Layer and Internetworking The TCP/IP protocol suit ATM MPLS

Optimal Routing View routing as a “global” optimization problem Assumptions: – The cost of using a link is a function of the flow on that link

FLOW CONTROL QuickTime™ and a GIF decompressor are needed to see this picture. QuickTime™ and a Photo - JPEG decompressor are needed to see this picture. LIDS Flow control: end-to-end mechanism for regulating traffic between source and destination

Service times M/G/1 General independent Poisson arrivals at rate λ Service time has arbitrary distribution with given E[X] and E[X2] – Service times are independent and identically

Carrier Sense Multiple Access (CSMA) In certain situations nodes can hear each other by listening to the channel “Carrier Sensing” CSMA: Polite version of Aloha

An interesting property of an M/M/1 queue, which greatly simplifies combining these queues into a network, is the surprising fact that the output of an M/M/1 queue with arrival rate λ is a Poisson process of rate