Question about Dell Vostro 5568

Dell Vostro 15-5568 does not have a separate docking port at the bottom.
It is better to use a separate USB docking station.
TIP:
If you have a USB docking station, use one with LAN, DVI-I or HDMI and a USB quick-charge port.
Advantage:
One USB cable connection to the laptop = ready and you can also operate 2 screens from the docking station.

mfg
Hnweb.ch

Acer sells a docking station that connects via the USB-C connector for about 250 SFR.