An USB to Ethernet adapter will be needed. 

Please make sure USB port on your PC is USB 3.0 port, USB 2.0 will not work.

Here is a recommended USB to Ethernet adapter that we have tested.

Anker Unibody Aluminum USB 3.0 to RJ45 Gigabit Ethernet Adapter Supporting 10/100/1000 Mbps Ethernet [RTL8153 Chipset]

You may find this adapter available on Amazon.