Instructor Note   The purpose of this target indicator is to review routed and routing protocols. This TI relates to CCNA Certification Exam Objectives #39, #40, and #42.

You have learned that protocols are like languages. One protocol that you have been learning about is IP, or the Internet Protocol. You know that IP is a network layer protocol. Because IP is routed over an internetwork, it is called a routed protocol. Examples of other types of routed protocols include Novell's IPX, and Appletalk. -

Routers use routing protocols to exchange routing tables and share routing information. In other words, routing protocols determine how routed protocols are routed. Examples of routing protocols include the following:

• RIP - Routing Information Protocol
• IGRP - Interior Gateway Routing Protocol
• EIGRP - Enhanced Interior Gateway Routing Protocol
• OSPF - Open Shortest Path First