Which function does an edge device serve in a network?

An edge device serves the crucial role of facilitating direct communication with external systems in a network. This position allows edge devices to act as a boundary or interface between the internal network and outside networks, such as the internet. They are instrumental in managing data transfers to and from external sources, ensuring that communication remains efficient and secure.

These devices often handle various tasks such as routing data, translating protocols, and providing security functions like firewalls or intrusion detection systems. In doing so, they contribute to the overall connectivity of the network infrastructure, ensuring that internal systems can interact seamlessly with external environments without compromising security or performance.

The other options do not accurately describe the primary function of edge devices. Storage solutions are generally provided by dedicated servers or storage systems rather than edge devices. Internal policy management is typically handled by internal network devices like routers or switches rather than edge devices. Monitoring internal network performance is more relevant to network management tools and software rather than the direct communication role of edge devices.