In comparing RADIUS vs TACACS+, which of the following statements are true? (Select three)
A. RADIUS encrypts the entire session between the client and the server.
B. TACACS+ is more secure than RADIUS because RADIUS encrypts only the password.
C. RADIUS is more vulnerable to buffer overflow attacks, birthday attack, and packet sniffing.
D. TACACS+ is considered more reliable than RADIUS because of TCP.
E. RADIUS is more interoperable because TACACS+ is Cisco proprietary.
F. TACACS+ is faster due to less encryption, less overhead and is compatible with more 3rd party systems.


Answer :

Option A, B and E are correct. The entire client-server session is encrypted via RADIUS. Because RADIUS merely encrypts the password, TACACS+ is more secure than RADIUS.

Simple central authentication server that routers, switches, and even servers can use to authenticate logons is the basic concept underlying a RADIUS or TACACS+ server. You can justify using Radius or TACACS+ for your network architecture by considering the benefits that a central user directory brings to authentication auditing and access control in a client-server approach. Only the password is encrypted by RADIUS during transmission.

RADIUS combines authentication (device) and authorization, while TACACS+ encrypts the entire session (User).

Authentication, Authorization, and Accountability are separated by TACACS+.

In its privilege mode, RADIUS is constrained.

TACACS+ offers 15 different privilege modes. Furthermore, you can restrict router instructions according to user groups.

Since RADIUS is an open standard, it is more compatible than TACACS+.

Cisco has exclusive rights to TACACS+.

Know more about TACACS+ here:

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