3Com 4210 9-Port Configuration Manual page 327

Figure 1-6 Network diagram for a typical HWTACACS application
HWTACACS server
HWTACACS client
Host
HWTACACS server
Basic message exchange procedure in HWTACACS
The following text takes telnet user as an example to describe how HWTACACS implements
authentication, authorization, and accounting for a user. Figure 1-7 illustrates the basic message
exchange procedure:
Figure 1-7 AAA implementation procedure for a telnet user
The basic message exchange procedure is as follows:
1-8