Let's explain what duplex mode is.
Duplex: The way information can be sent in two directions simultaneously between two points.
The meaning of duplex can be two-way transmission at the same time, as usual in the phone call like that. Devices such as walking on a phone are half-duplex or simple duplex.
Here's a pc6.com to take you to a deep study of how to set up a duplex tutorial:
1, on the desktop to find the "Network Neighborhood" icon, right-click, select "Properties"
2, the new window will see the "Local Connection" icon, also click the right button, select "Properties"
3, in the out of local connection properties, click the Configure button
4, select the "Advanced" tab, see the list of properties will be a number of items, select "Connection speed and Duplex (Speed & Duplex)", the right Drop-down menu can see the speed selection, the default is "automatic", there will be different rate selection. Once selected, you are OK (you will need to restart your computer if necessary)