How do you find the gateway address under router based network?

To find the gateway address in a router-based network, you can check the network settings on your device. On Windows, open Command Prompt and type ipconfig, then look for the "Default Gateway" under your active network connection. On macOS or Linux, open a terminal and type ip route or netstat -rn, and the gateway will be listed as the default route. Alternatively, you can log into the router's web interface using its IP address, typically 192.168.1.1 or 192.168.0.1, and find the gateway information there.