pCisco routers are everywhere that networks are. They come in all sizes, from inexpensive units for homes and small offices to equipment costing well over 100,000 and capable of routing at gigabit speeds. A fixture in today's networks, Cisco claims roughly 70 of the router market, producing high-end switches, hubs, and other network hardware. One unifying thread runs through the product line virtually all of Cisco's products run the Internetwork Operating System, or IOS. pp If you work with Cisco routers, it's likely that you deal with Cisco's IOS software--an extremely powerful and complex operating system, with an equally complex configuration language. With a cryptic command-line interface and thousands of commands--some of which mean different things in different situations--it doesn't have a reputation for being user-friendly.p p Fortunately, there's help. This second edition of iCisco IOS in a Nutshelli consolidates the most important commands and features of IOS into a single, w