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31 Days Before Your
CCNA Routing &
A Day-By-Day Review Guide for
the ICND1/CCENT (100-105), ICND2
(200-105), and CCNA (200-125)
• 800 East 96th Street • Indianapolis, Indiana 46240 USA
ii 31 Days Before Your CCNA Routing & Switching Exam
31 Days Before Your CCNA
Routing & Switching Exam
Copyright © 2017 Cisco Systems, Inc.
800 East 96th Street
Indianapolis, IN 46240 USA
All rights reserved. No part of this book may be reproduced or transmitted in any form or by any means,
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Printed in the United States of America
First Printing March 2017
Library of Congress Control Number: 2017932351
Warning and Disclaimer
This book is designed to provide information about exam topics for the Cisco Certified Networking
Associate (CCNA) Certification. Every effort has been made to make this book as complete and as
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iv 31 Days Before Your CCNA Routing & Switching Exam
About the Author
Allan Johnson entered the academic world in 1999 after 10 years as a business owner/operator to
follow his passion for teaching. He holds both an MBA and an M.Ed. in Occupational Training and
Development. Allan taught CCNA courses at the high school level for 7 years and has taught both
CCNA and CCNP courses at Del Mar College in Corpus Christi, Texas. In 2003, Allan began to
commit much of his time and energy to the CCNA Instructional Support Team, providing services
to Networking Academy instructors worldwide and creating training materials. He now works full
time for Cisco Networking Academy as a Learning Systems Developer.
About the Technical Reviewer
Rick McDonald teaches computer and networking courses via distance from the University of
Alaska–Fairbanks campus, where he is a Professor of Information Systems. He holds a BA in English
and an M.Ed. in Educational Technology from Gonzaga University in Spokane, Washington. His
current academic focus is developing methods for delivering hands-on training in Alaska using
web-based teaching tools.
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