If you are talking about PLC (Power-line communication) it will not boost the signal, only bring internet where there is no ethernet cable. This will...
What do you mean a network plug or wifi extender? The network plugs you plug in near the router and plug in a network cable and then put another one...
So strange that unknowingly, I had been doing the same thing over the years until a while ago when a teenage nerd friend told me "sleep mode is much...