Which step is required when configuring cloud and hybrid deployments for Cisco Jabber?

Refer to the exhibit. If the Webex Teams device cannot connect to Video Mesh Cluster-1 because it is busy, which media node does the Webex Teams device connect to next?
Which mode should be used when Call Policy is configured on Expressways?
Refer to the exhibit.
Which inbound connection should an administrator configure on the outside firewall?