CCSP SNRS EXAM CERTIFICATION GUIDE PDF

This chapter covers the following subjects: Layer 2 Attacks Mitigation of Layer 2 Attacks Unlike hubs, switches cannot regulate the flow of data between their ports by creating almost "instant" networks that contain only the two end devices communicating with each other. Data frames are sent by end systems, and their source and destination addresses are not changed throughout the switched domain. Switches maintain content-addressable memory CAM lookup tables to track the source addresses located on the switch ports. These lookup tables are populated by an address-learning process on the switch. If the destination address of a frame is not known or if the frame received by the switch is destined for a broadcast address, the switch forwards the frame out all ports. With their ability to isolate traffic and create the "instant" networks, switches can be used to divide a physical network into multiple logical or VLANs through the use of Layer 2 traffic segmentation.

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This chapter covers the following subjects: Layer 2 Attacks Mitigation of Layer 2 Attacks Unlike hubs, switches cannot regulate the flow of data between their ports by creating almost "instant" networks that contain only the two end devices communicating with each other. Data frames are sent by end systems, and their source and destination addresses are not changed throughout the switched domain. Switches maintain content-addressable memory CAM lookup tables to track the source addresses located on the switch ports.

These lookup tables are populated by an address-learning process on the switch. If the destination address of a frame is not known or if the frame received by the switch is destined for a broadcast address, the switch forwards the frame out all ports.

With their ability to isolate traffic and create the "instant" networks, switches can be used to divide a physical network into multiple logical or VLANs through the use of Layer 2 traffic segmentation. VLANs enable network administrators to divide their physical networks into a set of smaller logical networks. Like their physical counterparts, each VLAN consists of a single broadcast domain isolated from other VLANs and work by tagging packets with an identification header and then restricting the ports that the tagged packets can be received on to those that are part of the VLAN.

This chapter discusses Layer 2 attacks, mitigations, best practices, and functionality. If you already intend to read the entire chapter, you do not necessarily need to answer these questions now. The question quiz, derived from the major sections in "Foundation Topics" section of the chapter, helps you determine how to spend your limited study time.

Table If you do not know the answer to a question or are only partially sure of the answer, you should mark this question wrong for purposes of the self-assessment. Giving yourself credit for an answer you correctly guess skews your self-assessment results and might provide you with a false sense of security.

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CCSP SNRS EXAM CERTIFICATION GUIDE PDF

Network security engineers Greg Bastien, Sara Nasseh, and Christian Degu share preparation hints and test-taking tips, helping you identify areas of weakness and improve your knowledge of router and switch security. Material is presented in a concise manner, focusing on increasing your understanding and retention of exam topics. Foundation summary information gives you a quick refresher whenever you need it. Challenging chapter-ending review questions help you assess your knowledge and reinforce key concepts. The companion CD-ROM contains a powerful test engine that allows you to focus on individual topic areas or take complete, timed exams. The assessment engine also tracks your performance and provides feedback module-by-module basis, presenting question-by-question remediation to the text.

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CCSP SNRS Exam Certification Guide

Arashikasa Foundation summary information gives you a quick refresher whenever you need it. 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 and retrieval system, without written permission from the publisher, except for the inclusion of brief exxam in a review. Cisco certified Security Professional. To find out more about instructor-led training, e-learning, and hands-on instruction offered by authorized Cisco Learning Partners worldwide, please visit www. Get fast, free shipping with Amazon Prime.

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Posted on By anonymous. Network security engineers Greg Bastien, Sara Nasseh, and Christian Degu share preparation hints and -taking tips, helping you identify areas of weakness and improve your knowledge of router and switch security. Material is presented in a concise manner, focusing on increasing your understanding and retention of exam topics. Foundation summary information gives you a quick refresher whenever you need it. Challenging chapter-ending review questions help you assess your knowledge and reinforce key concepts. The companion CD-ROM contains a powerful engine that allows you to focus on individual topic areas or take complete, timed exams.

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CCSP Self-Study: CCSP SNRS Exam Certification Guide

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