What could be the IP address of a 128.107.255.254 default gateway?

The IP address of a default gateway typically falls within the same subnet as the devices it serves. For the IP address 128.107.255.254, the default gateway could be 128.107.255.1, 128.107.255.2, or any address from 128.107.255.1 to 128.107.255.253, depending on the network configuration. The specific choice would depend on the network design and the number of devices connected.