Exam Essentials
Remember the differences between RIPv1 and RIPv2. RIPv1 sends broadcasts every 30 seconds and has an AD of 120. RIPv2 sends multicasts (224.0.0.9) every 30 seconds and also has an AD of 120. RIPv2 sends subnet mask information with the route updates, which allows it to support classless networks and discontiguous networks. RIPv2 also supports authentication between routers, and RIPv1 does not.
Compare OSPF and RIPv1. OSPF is a link state protocol that supports VLSM and classless routing; RIPv1 is a distance vector protocol that does not support VLSM and supports only classful routing.