Which two licenses are required for the B2B feature to work? (Choose two.)

Refer to the exhibit.

Cisco Unified Communications Manager routes the call via the Webex Meetings route list and route group to the Video Mesh cluster Node#1 in the Video Mesh cluster is hosting the meeting and has reached full capacity, but other nodes in the cluster still have spare capacity.
What happens to the participant's call?

Refer to the exhibit.

Which two outbound connections should an administrator configure on the internal firewall? (Choose two.)

An administrator made changes to a directory connector for Webex AD synchronization. The number of users synchronized is quite large and the change should affect only a limited number of users. How can the administrator check the result before executing the synchronization?

What is the benefit of configuring ICE, TURN and STUN in a Cisco Unified Collaboration environment?