Chapter 6. Securing Layer 2 Devices

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This chapter covers the following topics:

  • Defending against Layer 2 attacks: This section explains how Cisco Catalyst switches can be configured to mitigate several common Layer 2 attacks.

  • Cisco Identity-Based Networking Services: This section examines how Cisco Identity-Based Networking Services (IBNS) uses IEEE 802.1x, RADIUS, and Extensible Authentication Protocol (EAP) technologies to selectively allow access to network resources, based on user credentials.

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The characteristics of Layer 2 LAN devices frequently make these devices attractive targets for attackers. If an attacker can compromise Layer 2, he has access to the upper layers. This chapter explores these Layer 2 ...

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