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CCIE Security v3.0 Quick Reference by Umesh Lakshman, Lancy Lobo

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Chapter 4. Security Technologies

Authentication Technologies

Authentication, authorization, and accounting (AAA) is an architectural framework for configuring a set of three independent security functions in a consistent manner. AAA provides a modular way of performing authentication, authorization, and accounting functions. Authentication enables user identification before granting access to the network and its resources. AAA authentication is defined by a named list of authentication methods and applying the same to different interfaces. The method list defines the types of authentication to be performed and the sequence in which they will be performed; it must be applied to a specific interface before any of the defined authentication methods ...

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