OSPF
Open Shortest Path First 1. OSPF is a standardized Link-State routing protocol, designed to scale efficiently to support larger networks. 2. OSPF employs a hierarchical network which is work on Areas basis . 3. OSPF sends updates (LSAs) when there is a change to one of its links, and will only send the change in the update. LSAs are additionally refreshed every 30 minutes . 4. Instead of advertising the distance to connected networks, OSPF advertises the status of directly connected links using Link-State Advertisements (LSAs). 5. OSPF form neighbor relationships with adjacent routers in the same Area . 6. OSPF is a classless protocol, and thus supports VLSMs. 7. OSPF uses the Dijkstra Shortest Path First algorithm to determine the shortest path. 8. OSPF traffic is multicast either to address 224.0.0.5 ( all OSPF routers) or 224.0.0.6 ...