What is the function of a mediation server in networking?

• A. To route all traffic through a single gateway for security.
• B. To provide storage space for shared files.
• C. To facilitate communication between different networks or protocols.
• D. To enforce access control lists on firewalls.

Answer: (C)

A mediation server exists to bridge different networks or protocols by translating and adapting messages so two sides can communicate. It sits between distinct protocol domains, receives a message in one format, converts it into a compatible form, and forwards it on. This enables interoperability when devices or services use different signaling standards, addressing schemes, or data formats. For example, in VoIP environments, a mediation server can bridge SIP signaling with other telecom signaling, handle necessary translation or mapping, and allow sessions to be established across heterogeneous networks. It’s not primarily about routing all traffic through one gateway, storing files, or enforcing access control lists on firewalls—those roles belong to gateways, storage servers, and firewalls, respectively.