The IP address box is located at the top left hand side of the interface. It lists the IP address of all network adaptors connected to your machine. To ensure CommsKit receives the commands you wish to test when unicasting, ensure you are targeting one of these addresses.
When sending data to CommsKit from the same machine (loopback) make sure to use the IP 127.0.0.1 rather than localhost.
When sending or receiving commands through Commskit, it is recommended you set your computers network settings to have the same or larger subnet mask configuration as the devices you are monitoring or transmitting data to.