包邮计算机考研玩转计算机网络

**讲 计算机网络概述......................................001 1.1 本讲考试导读.....................................................001 考纲要求......................................................................001 本讲考频统计...............................................................001 本讲知识结构................................................................002 1.2 考点总攻略..............................................................002 考点一：计算机网络的基础知识.................................003 考点二：计算机网络的性能指标.................................008 考点三：计算机网络的体系结构..................................010 考点四：OSI参考模型和TCP/IP模型............................016 1.3 核心考点总结和真题实战........................................026 一、核心考点总结............................................................026 二、真题实战....................................................................028 第二讲 物理层.............................................................031 2.1 本讲考试导读..............................................................031 考纲要求.............................................................................031 本讲考频统计.....................................................................031 本讲知识结构.....................................................................032 2.2 考点总攻略..................................................................032 考点一：传输介质..............................................................033 考点二：数据通信的基础知识..........................................035 考点三：编码与调制...........................................................038 考点四：奈奎斯特定理与香农定理....................................045 考点五：一个例子结束物理层的学习...............................049 2.3 核心考点总结和真题实战...........................................049 一、核心考点总结..............................................................049 二、真题实战......................................................................052 第三讲 数据链路层............................................................053 3.1 本讲考试导读...............................................................053 考纲要求..............................................................................053 本讲考频统计......................................................................054 本讲知识结构.......................................................................055 3.2 考点总攻略....................................................................055 考点一：数据链路层的功能................................................056 考点二：数据链路层的基本问题.........................................059 考点三：流量控制.................................................................064 考点四：介质访问控制方法.................................................075 考点五：局域网中的数据链路层.........................................087 考点六：广域网中的数据链路层..........................................095 考点七：数据链路层设备......................................................099 考点八：局域网交换机.........................................................105 考点九：VLAN.........................................................................113 3.3 核心考点总结和真题实战................................................121 一、核心考点总结..................................................................121 二、真题实战..........................................................................126 第四讲 网络层........................................................................130 4.1 本讲考试导读.................................................................130 考纲要求..................................................................................130 本讲考频统计............................................................................130 本讲知识结构............................................................................131 4.2 考点总攻略.........................................................................132 考点一：网络层的功能.............................................................132 考点二：IP地址........................................................................135 考点三：IP数据报格式.............................................................147 考点四： 路由协议..................................................................152 考点五：IP分组的转发流程....................................................167 考点六：网络层协议................................................................173 考点七：一个完整的例子结束网络层的学习.........................181 考点八：IP组播.........................................................................188 考点九：移动IP技术.................................................................189 考点十：网络层设备..................................................................192 考点十一：SDN...........................................................................195 4.3 核心考点总结和真题实战...................................................198 一、核心考点总结......................................................................198 二、真题实战.............................................................................203 第五讲 传输层..................................................................211 5.1 本讲考试导读.................................................................211 考纲要求..................................................................................211 本讲考频统计............................................................................211 本讲知识结构............................................................................212 5.2 考点总攻略....................................................................212 考点一：传输层的功能........................................................213 考点二：传输层的两种服务...............................................215 考点三：传输层的端口.......................................................215 考点四：UDP数据报...........................................................221 考点五：TCP协议.................................................................227 考点六：TCP可靠传输和拥塞控制.....................................236 考点七：一个例子结束传输层的学习................................252 5.3 核心考点总结和真题实战.............................................253 一、核心考点总结................................................................253 二、真题实战.......................................................................259 第六讲 应用层..................................................................263 6.1 本讲考试导读.................................................................263 考纲要求...............................................................................263 本讲考频统计.......................................................................263 本讲知识结构........................................................................264 6.2 考点总攻略....................................................................265 考点一：端系统的通信模型................................................265 考点二：DNS系统.................................................................265 考点三：文件传输协议.........................................................271 考点四：电子邮件系统..........................................................276 考点五：万维网（WWW）...................................................280 考点六: DHCP协议..................................................................284 考点七：以WWW为例结束应用层的学习..........................285 6.3 核心考点总结和真题实战...........................................287 一、核心考点总结..............................................................287 二、真题实战.....................................................................289 第七讲 高阶应用...............................................................294 7.1 流量控制......................................................................294 一、习题.............................................................................294 二、解析..............................................................................295 7.2 子网划分专题...............................................................297 一、习题..............................................................................297 二、解析..............................................................................299 7.3 路由转发专题...............................................................304 一、习题..............................................................................304 二、解析..............................................................................305 7.4 数据格式和封装专题...................................................308 一、习题.............................................................................308 二、解析.............................................................................310