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Chapter summary: DHCP assigns IP addresses by using automatic, manual, or dynamic allocation; DNS resolves host and domain names into IP addresses; WINS resolves NetBIOS names into IP addresses; ping tests whether one computer running TCP/IP can communicate with another computer on the network;.and other contents. | Chapter 9 TCP IP Routing 1 Chapter Overview A. Routing Principles B. Building Routing Tables Chapter 9 Lesson 1 Routing Principles 2 1. Understanding Routing A. A router is a system connected to two or more networks that forwards packets from one network to another. B. Routers operate at the network layer of the Open Systems Interconnection OSI reference model. C. Routers can connect networks running different data-link layer protocols and different network media. D. On large internetworks each network often has more than one router connected to it. 1. Redundant routers provide multiple routes to the same destination. E. One of a router s primary functions is to select the most efficient route to a destination. 3 1. In most cases the most efficient route is the one with the fewest hops. F. Routers share information about the networks they are attached to with other routers in the immediate vicinity. 1. Routers develop a composite picture of the internetwork by using this method. 2. On a large internetwork such as the Internet no single router possesses an image of the entire network. 4 2. Router Products A. Routers can be stand-alone hardware products or regular computers. B. Routing capabilities in operating systems 1. Microsoft Windows 2000 Microsoft Windows NT and Novell NetWare can route IP traffic between two networks. a. To route IP you must install two network interface adapters connect them to different networks and configure the computer to act as a router. b. A computer with two or more network interfaces is called a multihomed system. 2. Microsoft Windows 95 Microsoft Windows 98 and Microsoft Windows Me cannot route IP traffic between two network interface adapters on their own. a. You can use these operating systems as dial-in servers to access a network from a remote location using the NetBIOS Extended User Interface NetBEUI or Internetwork Packet Exchange IPX protocol. 3. Windows 2000 Windows Me and Windows 98 Second Edition include Internet .
