O'Reilly logo

Routing TCP/IP, Volume I (CCIE Professional Development) by Jeff Doyle

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Interior and Exterior Gateway Protocols

Areas introduce a hierarchy to the internetwork architecture. Another layer is added to this hierarchical structure by grouping areas into larger areas. These higher-level areas are called autonomous systems in the IP world and routing domains in the ISO world.

An autonomous system was once defined as a group of routers under a common administrative domain running a common routing protocol. Given the fluidity of modern internetworking life, the latter part of the definition is no longer very accurate. Departments, divisions, and even entire companies frequently merge, and internetworks that were designed with different routing protocols merge along with them. The result is that many internetworks nowadays ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required