Final answer:
A default route is used to transfer data to a host outside the local network when no other route to the destination exists.
Step-by-step explanation:
A default route is a routing table entry that tells a device where to send packets that are destined for a network outside of its own local network. The purpose of a default route is to transfer data to a host outside the local network when no other route to the destination exists. It is typically used when a device does not have a specific route for a particular destination address.