Chapter 39. OPEN SHORTEST PATH FIRST (OSPF)

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Interior routing protocols using a distance-vector routing algorithm, such as the Routing Information Protocol (RIP) we explored last chapter, have a long history and work well in a small group of routers. However, they also have some serious limitations in both scalability and performance that make them poorly suited to larger autonomous systems (ASes) or those with specific performance issues. Many organizations that start out using RIP quickly find that its restrictions and issues make it less than ideal.

To solve this problem, a new routing protocol was developed in the late 1980s. This protocol, called ...

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