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can someone tell me what the following means (I'm looking for a breakdown of each part):

aaa authentication login default group tacacs+       (can someone breakdown this for me? Is tacacs+ a group name?)
aaa authorization network default group tacacs+    (same question as above. Is tacacs+ a group name)
aaa accounting exec default start-stop group tacacs+ (what does everything after "exec" mean?)



thanks
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Top Expert 2006
Commented:
aaa authentication login default group tacacs+

This requires users logging into the router, on all lines that do not have a non-default authentication group assigned, to validate their identity, checked against the group of tacacs+ servers listed later in the config.

aaa authorization network default group tacacs+

This requires PPP, SLIP, and ARAP connections to get authorization from the tacacs+ servers listed later in the config.

aaa accounting exec default start-stop group tacacs+

This tracks the activity of user EXEC sessions to the tacacs+ server group.

See http://tinyurl.com/6tnks for further information.

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Commented:
hey thanks me.
So what does the "group" denote?
I'm assuming "tacacs+" denotes that we will be using TACACS+ as opposed to RADIUS?

Thanks