A TCPIP connection can be used to connect measurement instruments via network/ethernet.
To find a port, you need to register it with your visa runtime. For example, if you use the NI visa runtime, you can use the tool "NI MAX" to add TCPIP resources that afterwards will be also listed by the port manager of SweepMe!.
A TCPIP instrument resource has the format: "TCPIP[board]::host address[::LAN device name][::INSTR]", e.g. "TCPIP0::192.168.0.10::INSTR"