Which term describes a device that helps two different systems with different languages communicate with one another?

• A. Router
• B. Virtual Private Network
• C. Switch
• D. Gateway

Answer: (D)

Interoperability between systems that use different protocols requires a gateway, which translates and routes traffic between those distinct languages. A gateway bridges networks with incompatible protocols or data formats, enabling communication. A router forwards IP packets between networks but doesn’t perform protocol translation; a switch connects devices on the same network segment; a VPN provides a secure tunnel for traffic rather than translating protocols.