This is a book for everyone who works with Cisco routers. Cisco is a fixture on today's networks; the company dominates the router market and is an important maker of high-end switches, hubs, and other network hardware. One theme runs through all of Cisco's products: the Internetwork Operating System, or IOS. IOS is a great idea: learning one command interface lets you work with almost any Cisco product. IOS is extremely flexible and feature-rich, but it isn't user-friendly. It has a cryptic command-line interface with thousands of commands, some of which mean different things in different situations. There are probably over 100,000 pages of documentation. To put it mildly, finding what you need to know is a challenge. Cisco IOS in a Nutshell consolidates the most important commands and features of IOS into a single volume. It provides a brief, example-oriented tutorial that shows how to accomplish common tasks. The bulk of the book is a quick-reference guide to the commands most commonly used in IP routing applications. Brief descriptions and lists of options help you figure out what commands you need to accomplish any task, from setting up a serial interface to using applications such as packet filtering, address translation, and traffic prioritization. This may not be the only book you need on Cisco IOS, but you'll soon find that it's an indispensable resource.Boney, James is the author of 'Cisco Ios in a Nutshell A Desktop Quick Reference for Ios on Ip Networks', published 2001 under ISBN 9781565929425 and ISBN 156592942X.