What is a fundamental characteristic of a Webex Cloud Connected UC solution?

Refer to the exhibit. An engineer configures a VoIP dial peer on a Cisco gateway. Which codec is used?
An engineer wants to manually deploy a CISCO Webex DX80 Video endpoint to a remote user. Which type of provisioning is configured on the endpoint?
When setting a new primary DNS server in the Cisco UCM CLI what is required for the change to take affect?