1) What is routing & routed protocol?

A routed protocol is a Network Layer protocol that is used to move traffic between networks. IP, IPX, and AppleTalk are all examples of routed protocols. Routed protocols allow a host on one network to communicate with a host on another, with routers forwarding traffic between the source and destination networks.

Routing protocol serve a different purpose. Instead of being used to send data between source and destination hosts, a routing protocol is used by routers to exchange routing information with one another. For example, if we want our routers to dynamically “learn” about networks from one another, we configure them with a common routing protocol such as RIP or IGRP. Routers use routing protocols to exchange information about the networks they are aware of. In other words, routing protocols allow routers to “talk” to one another.