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CCIE Routing and Switching Exam Quick Reference Sheets by Anthony Sequeira

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Chapter 1. General Networking Theory

General Routing Concepts

Link-state and Distance Vector Protocols

Distance vector
  • Examples: Routing Information Protocol Version 1 (RIPv1), RIPv2, Interior Gateway Routing Protocol (IGRP)
  • Features periodic transmission of entire routing tables to directly connected neighbors
  • Mathematically compares routes using some measurement of distance
  • Features hop-count limitation
Link State
  • Examples: Open Shortest Path First (OSPF), Intermediate System-to-Intermediate System (IS-IS).
  • Sends local connection information to all nodes in the internetwork.
  • Forms adjacencies with neighboring routers that speak the same protocol; sends local link information to these devices.
  • Note that although this is flooding of information ...

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