Authentication, Authorization, and Accounting (AAA) Protocols

The preferred method for controlling access to networking devices in a large deployment situation is to use an Authentication, Authorization, and Accounting or AAA protocol such as Radius, Tacacs, or Kerberos. AAA is an important topic to master both from a practical real-world sense and from a CCIE perspective. This Study Guide provides an overview of AAA protocols including what they are, why they are used, and how they are implemented.

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