Which DNS record and port combination must be resolved externally for Mobile and Remote Access to be used?

Which DNS record and port combination must be resolved externally for Mobile and Remote Access to be used?
A . _cisco-uds edge on port 5061
B . _cisco-uds on port 8443
C . _collab-edge on port 5061
D . _collab-edge on port 8443

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Answer: D