OSPF is a complex protocol. To help beginners grasp abstract its concepts, a different approach is taken -- Visualizing OSPF simulation. This tutorial, OSPF basic, simulates the basic OSPF activities on a simple topology: H1-R1-R2-H2. R1 and R2 are routers. H1 and H2 are hosts. This simulation shows 4 stages:
1) R1 and R2 are not running OSPF. H1...