February 2002
Intermediate to advanced
416 pages
10h 52m
English
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Chapter 6. The Shortest Path First Algorithm
The essence of a routing protocol is to collect routing information about the networking environment and to determine the best paths to all known destinations. As discussed in Chapter 2, “Introduction to the IS-IS Routing Protocol,” these functions are performed by two processes within the architecture of the IS-IS protocol: the update process and the decision process. The update process is responsible for building the IS-IS database and ensuring its integrity. The decision process uses the shortest path first (SPF) algorithm to calculate the best paths to all known destinations based on the information in the Link-State database. The SPF algorithm works by computing the shortest path tree from a specific ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.