Question: What is the primary function of an MC Gateway Server in relation to interconnecting with a partner MCVideo system in a different trust domain?
Option 1: To directly expose MCVideo servers of the primary system to the partner system for simplified connectivity.
Option 2: To manage media transfer exclusively, without handling call or floor control signalling.
Option 3: To act solely as a security endpoint, encrypting all communications between systems.
Option 4: To provide topology hiding by acting as a proxy for one or more MCVideo servers, relaying both signalling messages and media.
Explanation: The MC Gateway Server's primary function in this context is to facilitate interconnection with another trust domain while maintaining the security and integrity of the primary MCVideo system. This is achieved by hiding the topology (i.e., not exposing the internal MCVideo servers) and acting as a relay for both signalling (call and floor control) and media, ensuring seamless communication without compromising security.