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CCNP Security SISAS 300-208 Official Cert Guide by Kevin Redmon, Aaron Woland

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RADIUS

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RADIUS is an IETF standard for AAA. As with TACACS+, RADIUS follows a client/server model in which the client initiates the requests to the server. RADIUS is the protocol of choice for network access AAA, and it’s time to get very familiar with RADIUS. If you connect to a secure wireless network regularly, RADIUS is most likely being used between the wireless device and the AAA server. Why? Because RADIUS is the transport protocol for EAP, along with many other authentication protocols.

Originally, RADIUS was used to extend the authentications from the Layer-2 Point-to-Point Protocol (PPP) used between the end user and the Network Access ...

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