What is difference between RADIUS and TACACS+?

The correct answer is B. TACACS+ separates authentication and authorization, and RADIUS merges them. RADIUS combines authentication and authorization. The access-accept packets sent by the RADIUS server to the client contain authorization information. This makes it difficult to decouple authentication and authorization. TACACS+ uses the AAA architecture, which separates AAA…

Submitted by minji_kr· Mar 5, 2026Security Fundamentals

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ARADIUS logs all commands that are entered by the administrator, but TACACS+ logs only start,
BTACACS+ separates authentication and authorization, and RADIUS merges them.
CTACACS+ encrypts only password information, and RADIUS encrypts the entire payload.
DRADIUS is most appropriate for dial authentication, but TACACS+ can be used for multiple types

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A
2% (1)
B
85% (40)
C
9% (4)
D
4% (2)

Explanation

RADIUS combines authentication and authorization. The access-accept packets sent by the RADIUS server to the client contain authorization information. This makes it difficult to decouple authentication and authorization. TACACS+ uses the AAA architecture, which separates AAA. This allows separate authentication solutions that can still use TACACS+ for authorization and accounting. For example, with TACACS+, it is possible to use Kerberos authentication and TACACS+ authorization and

Topics

#RADIUS#TACACS+#AAA protocols

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