What is typically the role of a default gateway in a network?

The role of a default gateway in a network is primarily to provide a direct path for data to travel to other networks. This component serves as a crucial route for devices on a local network to communicate with devices outside of that network, such as those on the internet or other LANs (Local Area Networks). When a device wants to send data to an external network, it forwards the data packet to the default gateway, which then processes the packet and directs it to its intended destination. Essentially, the default gateway acts as an intermediary, enabling communication beyond the local subnet.

The other options represent functions that are not typically associated with a default gateway. Assigning IP addresses to devices is the role of a Dynamic Host Configuration Protocol (DHCP) server. Resolving domain names into IP addresses is handled by the Domain Name System (DNS). Acting as a firewall against external threats involves security appliances or software designed to monitor and filter traffic based on predefined security rules. These tasks are distinct from the primary function of a default gateway, which focuses solely on directing traffic between different networks.