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
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E is correct