@Maxima For your information, the Archer C6 supports OpenVPN and PPTP VPN, while it does not support IPsec VPN. May it help.

@dongba The TL-WA850RE is a range extender; to make it work, the signal led should be on at first. Below is the instruction to set it up. https://www.tp-link.com/support/download/tl-wa850re/#video...

@tonylinde I see, thanks for your reply. You can connect it to the 5GHz to test the speed; and you can change another device to run a comparison test with the Archer T2U nano. Any updates, please let...

@majlo He changed the cable to a better one, cat6. If you use the cat5 or below cable, the speed you get won't be higher than 100Mbps. Try to get a better one. Good day.

@majlo Hello, it does have the 1Gbps ethernet port. Output Interface 1 10/100/1000Mbps RJ45 Ethernet Port Try to change another ethernet cable, like cat5e or above to give it a go. May it help.

@maufedz86 You can go to official website to download the driver for MAC 10.15. Good day.