What is the primary purpose of a default gateway in IP configuration?

The primary purpose of a default gateway in IP configuration is to connect a network to external networks. A default gateway serves as a routing device that allows devices on a local network to communicate with devices on different networks, typically the internet or other remote networks. When a device on the local network needs to send data to an IP address that is not on the same local subnet, it forwards that data to the default gateway. The gateway then takes on the responsibility of routing the data to its ultimate destination outside the local network.

In this context, the default gateway is critical for enabling connectivity beyond the local environment, allowing devices to access resources, services, and information available on different networks. Without a properly configured default gateway, devices would be limited to interactions within their own subnet and would be unable to access external networks or the internet.