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Authorized translation from the English language edition, entitled IT ESSENTIALS COMPANION GUIDE V7,1st Edition by CISCO NETWORKING ACADEMY, published by Pearson Education, Inc, publishing as Cisco Press, Copyright © 2020 Pearson Education, Inc.
All rights reserved. No part of this book may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording or by any information storage retrieval system, without permission from Pearson Education, Inc.
CHINESE SIMPLIFIED language edition published by POSTS AND TELECOM PRESS CO., LTD., Copyright © 2022.