Section 1: Cisco Layer 2 Security

A lot of attention is paid to securing the higher layers of the OSI reference model with network-level devices such as firewalls and intrusion protection systems (IPS) and applications such as antivirus and host-based intrusion protection (HIPS).

Layer 2 attacks occur, as you would expect, at Layer 2 of the OSI model. We know that switching operates at Layer 2, and therefore most of these attacks need to be mitigated in the switches that you deploy in your network.

Types of Layer 2 Attacks

We cover several types of Layer 2 attacks in this section. This section also explains how to mitigate these attacks by implementing the correct control in Cisco IOS.

The main types of Layer 2 attacks are as follows:

• CAM overflow ...

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