Yes. mydlink cameras do not require any specific router.
#2 Does this router work with line of sight internet?
I have connected additional this router for more coverage WiFi but I forget the password and try to login into admin page, I couldn’t and things happened as per my previous comments.
There is a Quick Start Guide in the box when you open it. It is very easy to set up. Just follow the directions.
#4 What is a best router for coffe shop? So my customers can connect all at once with no slow connection?
Definitely not this one. Keeps going blank and has to be restarted and we tried setting our own password and keeps forgetting it so it only works with the manufacturer password provided in the back label.
It worked well with my regular Cable Modem. I do not think it requires a special modem. The modem must have an Ethernet output to be able to connect to the Router