Understanding the OSPF Link-State Routing Protocol

ImageOSPF Basics

Routing protocols basically exchange information so routers can learn routes. The routers learn information about subnets, routes to those subnets, and metric information about how good each route is compared to others. The routing protocol can then choose the currently best route to each subnet, building the IP routing table.

This next (second) major section continues to look at routing protocol concepts, now by narrowing the focus to only link-state protocols, specifically OSPF. This section begins by discussing how OSPF routers learn information and choose what routes to add to ...

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