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Routing TCP/IP, Volume I (CCIE Professional Development) by Jeff Doyle

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Chapter 4

A1: A routing protocol is a “language” that routers speak to each other to share information about network destinations.
A2: At a minimum, a routing protocol should define procedures for:
  • Passing reachability information about networks to other routers

  • Receiving reachability information from other routers

  • Determining optimal routes based on the reachability information it has and for recording this information in a route table

  • Reacting to, compensating for, and advertising topology changes in an internetwork

A3: A route metric, also called a route cost or a route distance, is used to determine the best path to a destination. Best is defined by the type of metric used.
A4: Convergence time is the time a group of routers take to complete ...

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