Preparing for the CCNA exam? Working as a network administrator? Here are all the CCNA-level commands you need in one condensed, portable resource. The CCNA Portable Command Guide by Scott Empson is filled with valuable, easy-to-access information, and is portable enough for use whether you're in the server room or the equipment closet.
This book will help you memorize commands and concepts as you work to pass the CCNA exam (INTRO 640-821, ICND 640-811, or CCNA 640-801). The guide summarizes all CCNA certification-level Cisco IOS Software commands, keywords, command arguments, and associated prompts, providing you with tips and examples of how to apply the commands to real-world scenarios. Configuration examples throughout the book provide you with a better understanding of how these commands are used in simple network designs.
Chapter two, excerpted here, discusses Variable-length subnet masking (VLSM) -- the more realistic way of subnetting a network to make for the most efficient use of all of the bits.
(Reproduced from the book CCNA Portable Command Guide, ISBN 1587201585, Copyright 2005, Cisco Systems, Inc. Reproduced by permission of Pearson Education, Inc., 800 East 96th Street, Indianapolis, IN 46240. Written permission from Pearson Education, Inc. is required for all other uses. Visit www.ciscopress.com for a detailed description and to learn how to purchase this title.)
This was first published in January 2006