What is the main function of a gateway in a network?

The primary function of a gateway in a network is to facilitate communication between different networks that may be using different protocols. This is accomplished through the process of translating messages or data formats from one protocol to another, allowing devices on disparate systems to communicate effectively.

For instance, a gateway could connect a local area network (LAN) that uses Ethernet with a wide area network (WAN) that might use a different protocol, ensuring that data can flow seamlessly across both networks. By handling these protocol conversions, gateways enable interoperability between different technologies, which is crucial in diverse network environments.

Other functions mentioned, such as limiting devices, serving as connection points for remote users, or monitoring network traffic, are typically associated with devices like switches, routers, and firewalls rather than gateways.