10.2 IP Routing Protocols  
  10.2.3 Routed versus routing  
Protocols used at the network layer that transfer data from one host to another across a router are called routed or routable protocols. Routed protocols transport data across a network. Routing protocols allow routers to choose the best path for data from source to destination.

A routed protocol functions include the following:

  • Includes any network protocol suite that provides enough information in its network layer address to allow a router to forward it to the next device and ultimately to its destination.
  • Defines the format and use of the fields within a packet

The Internet Protocol (IP) and Novell's Internetwork Packet Exchange (IPX) are examples of routed protocols. Other examples include DECnet, AppleTalk, Banyan VINES, and Xerox Network Systems (XNS).

Routers use routing protocols to exchange routing tables and share routing information. In other words, routing protocols enable routers to route routed protocols.

A routing protocol functions includes the following:

  • Provides processes for sharing route information
  • Allows routers to communicate with other routers to update and maintain the routing tables

Examples of routing protocols that support the IP routed protocol include the Routing Information Protocol (RIP), Interior Gateway Routing Protocol (IGRP), Open Shortest Path First (OSPF), Border Gateway Protocol (BGP), and Enhanced IGRP (EIGRP).

 

Interactive Media Activity

Checkbox: Routed vs. Routing Protocols

After completing this activity, the student will be able to identify the differences between routed and routing protocols.

   
 

Web Links

Routing versus. Routed Protocols

http://www.inetdaemon.com/tutorials/internet/ routing/routing_vs_routed.html