What is the purpose of RADIUS CoA (RFC 3576)?

What is the purpose of RADIUS CoA (RFC 3576)?
A . to force the client to re-authenticate upon roaming to a new Controller
B . to apply firewall policies based on authentication credentials
C . to validate a host MAC address against a whitelist or a blacklist
D . to authenticate users or devices before granting them access to a network
E . to transmit messages to the NAD/NAS to modify a user’s session status

View Answer

Answer: E

Explanation:

CoA messages modify session authorization attributes such as data filters.

References: https://tools.ietf.org/html/rfc3576