Chapter 2. Access Control

The use of technology continues to expand in this digital age with the ever-increasing volume of data. An exponential amount of data is crossing the networks today. Without any security mechanism in place, each network has complete access to the other with no way of differentiating between authorized and unauthorized activity.

One of the fundamental steps necessary to control network access is the capability to control the data flow within a network. One of the many ways to achieve this is to use an ACL, or access control list (commonly referred to as ACL). ACLs are effective, easy to configure, and available across all major Cisco products.

This chapter focuses primarily on the use and configuration of ACLs available ...

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