A default gateway is a networking device that serves as the default path for network traffic to be forwarded when the destination IP address is not on the local network. It is typically a router or a firewall that connects the local network to the Internet or another network.
It is important to know how to check the default gateway, as it can be useful for troubleshooting network connectivity issues and determining the network configuration. Additionally, it can be helpful for setting up port forwarding and other networking tasks.