What is the primary function of a gateway device in a network?

The primary function of a gateway device in a network is to regulate traffic and enforce rules. Gateways serve as a point of entry and exit for data flowing between different networks, often with different protocols. They act as translators between different communication protocols or data formats, allowing different networks to interconnect and communicate effectively.

In addition to facilitating communication between networks, gateways can also implement security policies, filtering traffic and enforcing rules to protect the network. This includes any necessary changes or adaptations in the traffic as it enters or leaves the network. By doing so, they help to maintain the integrity and security of the data being transmitted.

While other options might describe functions pertinent to different types of devices—like data storage, establishing secure connections (like a VPN), or hosting services—they do not align with the primary purpose of a gateway device.