

FYI ‘phone line’ is known as rj11, ‘ethernet’ is rj45. There’s different types of ethernet cable, most common is ‘cat5e’ that can transfer data up-to 1Gb/sec. Newer cables are usually ‘cat6a’ which adds shielding and up-to 10x the data transfer speed.
So when you go looking for a new one for whatever reason, you have the technical name and don’t have to look at the pictures and hope the listing is actually what you need.
Depending on the individual and severity, yeah. I have a sibling who is fine with flashing lights up to a rather high point, but another friend who also has this is much more vulnerable to it, even flashing lights in a relatively small section of the screen (sudden lights in a dark environment in the background, for example, while their character sits in a lit area) while playing a game.