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CCNP Security Secure 642-637 Quick Reference by Andrew Mason

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Chapter 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, 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; therefore, most of these attacks need to be mitigated in the switches you deploy in your network.

Layer 2 attacks are often overlooked when designing a network security solution; it is quite normal to find Layer 2 networks with no protection whatsoever. The availability of dedicated Layer 2 attack tools makes it necessary to defend against possible attack ...

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