Do you have a modem? I assume you have a modem since you got a username and password for internet. 1) use a Ethernet cable to connect the modem to blue port of the TL-WR720N. 2) use another Ethernet...

it is normal to take sometime to load the tplink login page. Once the internet is working, no need to operate the login page so often. As to the WAN port unplugged, check the cable, I bet.

Why not select the Interface? Different WAN interfaces co-response to different external IP addresses.

The N-type connector is not a problem. You can buy a pigtail cable to convert it to SMA connector or other connector which fits your router. "two blocks away" ---- What's the distance? With the...

The C7, when it connects to the root AP with WDS on 5Ghz, it requires the root AP to be 4-addr(standard WDS) capable. Check the Dlink to see if there is such options to support WDS transparency....

Yes. must log in the mini router via WIFI in router mode, since the only port is acting as WAN port.