Cisco Networking Simplified, Second Edition

Chapter . Port-Based Security

Combating Access-Based Attacks

A common entry point for network threats are the wired (and wireless) access ports where devices connect, such as laptops, printers, IP phones, and others. Without appropriate measures, hackers attempting to cause mischief in networks can plug into a port and use it as a launching location to work their way into the rest of the network. Such intrusions may require physical access to the corporate location. Physical security measures such as locked doors, badge readers, video surveillance, and security staff are always a critical line of defense to prevent such attacks.

However, gaining physical access to many corporate locations is not as hard as you might think. A practice known as