Home » Cisco » 210-260 v.2 » Which three ways does the RADIUS protocol differ from TACACS?
In which three ways does the RADIUS protocol differ from TACACS? (Choose three.)
A. RADIUS uses UDP to communicate with the NAS.
B. RADIUS encrypts only the password field in an authentication packet.
C. RADIUS authenticates and authorizes simultaneously, causing fewer packets to be transmitted.
D. RADIUS uses TCP to communicate with the NAS.
E. RADIUS can encrypt the entire packet that is sent to the NAS.
F. RADIUS supports per-command authorization.
Correct Answer: ABC
Explanation/Reference:
Two prominent security protocols used to control access into networks are Cisco TACACS+ and RADIUS. The RADIUS specification is described in RFC 2865 leavingcisco.com, which obsoletes RFC 2138 leavingcisco.com. Cisco is committed to supporting both protocols with the best of class offerings. It is not the intention of Cisco to compete with RADIUS or influence users to use TACACS+. You should choose the solution that best meets your needs.
Reference: http://www.cisco.com/c/en/us/support/docs/security-vpn/remote-authentication-dial-user-service-radius/13838-10.html