Network Security Principles and Practices

Summary

This chapter talked about issues related to security on Layer 2 networks. General recommendations to secure a LAN environment were discussed, as were various features available on the Catalyst switches to make the switching environment more secure. We looked at how some of the more well-known attacks can be orchestrated at Layer 2 of the OSI model. We also looked at ways to control these attacks using various features available in the Catalyst line of switches. We looked at methods of securing the ports on a switch, including the emerging 802.1x standard. Although the discussion focused on the high-end Catalyst switches—namely, the 5500 and 6500 switches—the concepts are generic and can be carried over to other switches as well with the ...