IGP vs EGP

OSPF area study:

Part1: http://blog.ine.com/2009/07/25/ospf-areas-part-1-the-backbone-area/
Part2: http://blog.ine.com/2009/07/26/ospf-areas-part-2-normal-and-stub-areas/

IGP vs EGP

http://studynet-work.blogspot.ca/2011/09/igp-vs-egp.html