300-715 · Question #205
An engineer is configuring ISE for network device administration and has devices that support both protocols. What are two benefits of choosing TACACS+ over RADUs for these devices? (Choose two.)
The correct answer is D. TACACS+ provides the ability to authorize specific commands while RADIUS does not. E. TACACS+ encrypts the entire payload being sent while RADIUS only encrypts the password. TACACS+ is preferred over RADIUS for network device administration because it supports granular command authorization and encrypts the entire packet payload for enhanced security.
Question
An engineer is configuring ISE for network device administration and has devices that support both protocols. What are two benefits of choosing TACACS+ over RADUs for these devices? (Choose two.)
Options
- ATACACS+ is FIPS compliant while RADIUS is not.
- BTACACS+ is designed for network access control while RADIUS is designed for role-based
- CTACACS+ uses secure EAP-TLS while RADIUS does not.
- DTACACS+ provides the ability to authorize specific commands while RADIUS does not.
- ETACACS+ encrypts the entire payload being sent while RADIUS only encrypts the password.
How the community answered
(35 responses)- A9% (3)
- B3% (1)
- C3% (1)
- D86% (30)
Why each option
TACACS+ is preferred over RADIUS for network device administration because it supports granular command authorization and encrypts the entire packet payload for enhanced security.
FIPS compliance is related to cryptographic modules, and both protocols can be used in FIPS-compliant contexts with appropriate implementation, so this is not a differentiator.
RADIUS is primarily designed for Network Access Control (NAC), while TACACS+ is specifically designed for network device administration (AAA), so this statement is reversed and incorrect.
EAP-TLS is an EAP method typically used with RADIUS for strong authentication; TACACS+ does not generally use EAP.
TACACS+ provides the ability to authorize specific commands that users can execute on a network device, offering much more granular control over administrative access than RADIUS.
TACACS+ encrypts the entire payload of its packets, ensuring that all information exchanged during the authentication and authorization process is secure, unlike RADIUS which only encrypts the password field.
Concept tested: TACACS+ vs RADIUS for device administration
Source: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/sec_usr_aaa/configuration/15-mt/sec-usr-aaa-15-mt-book/sec-tac-plus.html
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