004 AAA Protocols TACACS RADIUS

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AAA – Components
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Supplicant
Device requesting Access.
Computer , Laptop, IPhones, Mobile , TAB
Authenticator
Device enforcing Authentication ( NAD)
Router, VPN Gateway, Access point, Switch
Bridges information between Supplicant & Authentication server.
Authentication Server
Validates the identity of client & notifies switch if the client is Authorized to access network.
Cisco ISE or ACS ( RADIUS protocol)
Username/Passwords, PKI

TACACS+ or RADIUS
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TACACS+ for Device Administration
Able to do command Authorization
Able to do Command Accounting (RADIUS do not support)

RADIUS for Network Access
Control, Authenticate user access networks (Wired, Wireless, VPN)
RADIUS only support EAPoL (TACACS do not )
Combines Authentication & Authorization in one step
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