You might think that jailbreaking a PS4 to run unsigned code is a complicated process that takes fancy tools and lots of work. While developing said jailbreaks was naturally no mean feat, thankfull…
Yes, it does. The standard method is to use a PC with Linux or Windows and install a program that triggers the jailbreak on your PS4 whilst connected to it via ethernet cable. Using a TV makes it a little more hassle-free depending on your setup since you're turning on your TV anyways and don't need to use the PC at all.
Yes, but that's boring, they even mentioned it in the article right before they talk about the Ethernet port, here's the link if you want to do it yourself https://github.com/TheOfficialFloW/PPPwn