Which port on the firewall must be opened to allow the CoA traffic to traverse the network?

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An engineer is configuring 802.1X authentication on Cisco switches in the network and is using CoA as a mechanism.

Which port on the firewall must be opened to allow the CoA traffic to traverse the network?
A . TCP 6514
B . UDP 1700
C . TCP 49
D . UDP 1812

Answer: B

Explanation: