| (I) An Internet protocol [R2138] for carrying dial-in users'
authentication information and configuration information between a
shared, centralized authentication server (the RADIUS server) and
a network access server (the RADIUS client) that needs to
authenticate the users of its network access ports. (See: TACACS.)
(C) A user of the RADIUS client presents authentication
information to the client, and the client passes that information
to the RADIUS server. The server authenticates the client using a
shared secret value, then checks the user's authentication
information, and finally returns to the client all authorization
and configuration information needed by the client to deliver
service to the user.
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