Chapter 14. Internetworking with Dissimilar Protocols
Many small networks feature a single routing and/or routed protocol. It is a given that each network will require one of each: a routed protocol to encapsulate and transport data to its destination, and a routing protocol to discover, compare, and select optimal routes through the network to that destination. Having one of each protocol greatly simplifies many facets of internetworking, including route calculation and the exchange of routing information between all of its member nodes. Unfortunately, as beneficial as it may be to use just one protocol, it is not always possible or even practical.
In real life, there are countless reasons multiple protocols may be unavoidable in an internetwork. ...
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