Today was a short study session this morning, only about an hour since it was mainly just reading about IS-IS (Intermediate System-Intermediate System). During my reading I'm learning that IS-IS are very similar to OSPF mainly because they were developed around the same time and the developers seemed to be in competition with each other the entire time! OSPF is the more popular protocol today based on being focused on IPv4 entirely to begin with. IS-IS uses a short of open ended protocol standard which leaves it very scalable for future purposes. IS-IS is also not nearly as complex to OSPF thanks to simpler mechanisms for creating routing domains and less LSP's (Link-State Packets) needed to accomplish the same goal. I'll probably do a little more research on the history of this protocol tonight along with lab out a couple of Frame-Relay topics just to keep my mind sharp with configuring routers.
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