Hope this FAQ can help you.

For question 1. I guess you want to config Access Security. If so, you can go to System--Access Security-- Access Control---Port Based. For question 2. you need to config AAA, for detailed...

Have you ever contact the TP-LINK supporter for this problem? If not, please do contact them, may be they can hlep you.

Maybe it is because the traffic on the port is very low. The ports of the TL-SG2008 are all Gigabit ones. You can try to monitor the status when you do the speedtest by using speedtest.net. If your...

I think the problem is caused by your wrong configuration. According to your set, the port 1 of the switch is General + Untagged, in my opinion, it should be General+tagged or Trunk one. And since I...

I am not very sure about your problem, but I am sure the TL-SG3216 supports 802.1q VLAN. You can contact their supporter directly for help.