Understanding Wide Area Networks
Crystal Panek · 2019
This chapter defines the most common WAN technologies available and increases your understanding of routing protocols and routing devices. Routing is the process of moving data across networks or internetworks between hosts or between routers themselves. Information is transmitted according to the IP networks and individual IP addresses of the hosts in question. A router is in charge of maintaining tables of information about other routers on the network or internetwork. It also utilizes several different TCP/IP protocols to transfer the data and to discover other routers. IP routing is the most common kind of routing as TCP/IP is the most common protocol suite. IP routing occurs on the Network layer of the OSI model. A static route is one that has been manually configured. A dynamic route is one that has been implemented dynamically with special routing protocols. In this section, you will configure RRAS statically and add the Routing Information Protocol (RIP) to allow for dynamic routing. A routing table is the data that is stored and used by TCP/IP network routers to determine the destination of messages that is being forwarded. The routing table is basically a database that is maintained and managed by the router's built-in hardware and software. The routing tables contain a list of IP addresses.