The CCNA Routing and Switching Portable Command Guide , Third Edition, is filled with valuable, easy-to-access information and is portable enough for use even in the server room or the equipment closet. The guide summarizes all CCNA certification-level Cisco IOS© Software commands, keywords, command arguments, and associated prompts, providing students with tips and examples of how to apply the commands to real-world scenarios. Configuration examples throughout the book provide students with a better understanding of how these commands are used in simple network designs. This book has been completely updated to cover topics in the ICND1 100-101, ICND2 200-101, and CCNA 200-120 exams. Students can use this quick reference resource to help memorize commands and concepts as they work to pass the CCNA Routing and Switching certification exam.