Redistributing between Routing protocols

Today I spent most of my time going through the various redistributing differences between routing protocols. The hardest redistributing to remember was the metric for the protocols that used distance-vector technology which is RIP, EIGRP, and IGRP. The metric for these protocols have a default value of infinity which means that any other routing protocol wouldn't be redistributed unless you defined the metric that is to be used. Also OSPF doesn't redistribute classless IP routes by default, you have to specify that subnets will be used for whatever reason. IS-IS was surprisingly the easiest but maybe that's because I just finished that chapter last week? I have a ways to go to finish this chapter won't be until sometime next week most likely. I will run through some labs in my portable command-guide the next few nights to get some more practice with the theory I've learned so far.