What does a default gateway allow a device on a local network to do?

A default gateway serves as a crucial element in network communication, particularly for devices within a local network. Its primary function is to facilitate communication between devices on a local subnet and devices on remote networks. When a device attempts to send data to an IP address that is outside of its own subnet, it needs to route that traffic through a gateway. The default gateway acts as an intermediary that forwards packets from the local network to destinations beyond it, essentially providing a path for external communication.

This capability is fundamental for connecting to various resources, such as the internet or other remote networks, allowing devices within a local network to access websites, cloud services, and other distant servers. The other options, such as sending data to devices within the same subnet, storing data files, or handling data processing, do not pertain to the unique role of a default gateway. The gateway's function is specifically to connect local devices to external networks, making it a vital component of network infrastructure.