day3-1tcp-五ip协议详解.ppt

Stub Network ip route 172.16.1.0 255.255.255.0 172.16.2.1 172.16.2.1 SO 172.16.1.0 B 172.16.2.2 Network A B 这是一条单方向的路径，必须配置一条相反的路径。 Stub Network ip route 0.0.0.0 0.0.0.0 172.16.2.2 172.16.2.1 S0 172.16.1.0 B 172.16.2.2 Network A B 使用缺省路由后，Stub Network可以到达路由器A以外的网络。 路由协议 用于路由器选择路径和管理路由表。 一旦选择了一条路径后，路由器将路由可路由协议 。 NetworkProtocol DestinationNetwork ConnectedRIPIGRP 10.120.2.0172.16.2.0172.17.3.0 Exit Interface E0S0S1 可路由协议: IP路由协议: RIP, IGRP 172.17.3.0 172.16.1.0 10.120.2.0 E0 S0 路由协议 2501(config)#ip route 172.16.1.0 255.255.255.0 172.16.2.1 2501(config)# 说明： 172.16.1.0：目的地址 255.255.255.0：子网掩码 172.16.2.1：下一跳的IP地址 （也称为网关，离本子网最近的路由器接口地址） 静态路由的删除： 2501(config)#no ip route 172.16.1.0 255.255.255.0 172.16.2.1 2501(config)# 缺省路由，用于INTERNET连接，安全性不好。请做访问控制列表或... 2501(config)#ip route 0.0.0.0 0.0.0.0 e0 2501(config)# 请大家写出以上拓扑的静态路由表。 A: xdy(config)#ip route 172.16.40.0 255.255.255.0 192.168.20.2 xdy(config)# B: C: 1. 静态路由与动态路由比较，有什么优、缺点？ 2. IGRP协议比RIP协议有什么优点？ 3. 要实现一个大型网络的IP路由(六台核心路由器)，应该使用什么路由协议？ Purpose: This figure introduces students to routing. The router must accomplish the items listed in the figure for routing to occur. Emphasize: Path determination occurs at Layer 3, the network layer. The path determination function enables a router to evaluate the available paths to a destination and to establish the best path. Routing services use network topology information when evaluating network paths. This information can be configured by the network administrator (static routes) or collected through dynamic processes (routing protocols) running in the network. Transition: How do you represent the path to the packet’s destination? Purpose: This figure explains that routers must learn about paths not directly connected. Emphasize: The router already knows about directly connected networks. It must learn about those networks not connected. This chapter describes how routers learn about those paths. Purpose: This figure introduces students to static an