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OSPF Lab For this lesson we create Areas with a specific group of routers and show you how to apply/configure the components required to build an area. We'll demonstrate how process ID is a factor in the "create area" process, how to calculate and apply wild card bits and the importance of Area IDs in this process. Here's a neat trick -- you'll also learn how to manually create loopback addresses and map them back to the routers within your new Area whenever OSPF selects its own router ID. And you'll learn what event has to occur before a loopback address could fail.