浙江传媒学院 11电子信息学院 数据通信与计算机网络 期末知识点
数据通信与计算机网络
第二章:数据通信基础..................................................................................................2
1.基本概念..................................................................................................................................22.通信系统模型..........................................................................................................................33.通信方式..................................................................................................................................34.编码方式..................................................................................................................................45.差错控制..................................................................................................................................4
第三章:物理层...............................................................................................................5
1.物理层的任务,’透明’的传输比特流......................................................................................52.物理层≠物理传输介质......................................................................................................53.物理层协议:机械,电器,功能,规程.........................................................................................5
第四章:数据链路层......................................................................................................6
1.数据..........................................................................................................................................62.功能..........................................................................................................................................63.停止等待,ARQ协议,连续ARQ,回退N帧..........................................................................64.HDLC......................................................................................................................................6协议第五章:局域网体系结构..............................................................................................7
1.LLC,MAC...............................................................................................................................7网卡作用:4.以太网(最典型的协议)...........................................................................................................75.无线局域网..............................................................................................................................7
第六章:网络层...............................................................................................................8
1.两种服务..................................................................................................................................82.路由选择算法..........................................................................................................................83.拥塞控制(各层都参与)...........................................................................................................8
第七章:Internet网络层................................................................................................9
1.分类的IP地址的划分............................................................................................................92.IP数据报,TTL(生存时间)含义.............................................................................................93.ARP........................................................................................................................................104.ICMP(Internet控制报文协议)...........................................................................................10
第九章:传输层
.............................................................................................................10
1.四功能....................................................................................................................................102.拥塞控制(大题!)....................................................................................................................10