Devolo Magic 2 WiFi Starter Kit 2-1-2
2400 Mbit/s
Devolo Magic 2 WiFi Starter Kit 2-1-2
2400 Mbit/s
Yes, it worked for me with my Sunrise Internet box.
No, you can't.
A question for electricians / electrical installers, but I am not. But: I live in a house built in 1978 and have no problems at all.
Yes, there should simply be no other cables or socket strips in between. Using other plugs on the same multiple socket should not really be a problem.