One helpful way to identify your Plugable ethernet adapter is through the System Settings app in macOS. 

In this example, we will be analyzing our USBC-E2500, which is a 2.5G ethernet adapter. This method applies to all of our ethernet adapters, such as:

• USB3-E1000
• USBC-E1000
• USBC-E2500

Navigate to the Network section, select the entry named “USB 10/100/1G/2.5G LAN” with the Green - Connected icon. Expand the Details button, and go to Hardware.

 

In the field that says Speed, you should see 2500Base-T if the ethernet adapter is connected to a 2.5G ethernet LAN port on your router. If you see 1000Base-T, this means the adapter is connected to a 1G ethernet LAN port. If you are expecting faster network speeds, please see your router's documentation on its multi-gig LAN port.