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CCSP Self-Study: CCSP SNRS Exam Certification Guide by Christian Abera Degu, Sara CCIE No. 5824 Nasseh,, Greg Bastien

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Chapter 14. Mitigating Layer 2 Attacks

This chapter covers the following subjects:

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 ...

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