Just a small update about routers.
If you have multiple computers or game consoles that need to be hooked up to the internet at the same time then you should already have or should get a router. It's a simple device that has a slot for the ethernet cord with the internet service going in and splits the power between all the wire for the normally 4 output (can be more) ethernet ports that can go into any device that requires network connection.
If you have things that require wireless connection and you do not have wi-fi service then you will have to purchase a wireless router. It still contains the output ethernet ports so you can still split between the wired and wireless devices. But with wireless output there is danger of other people stealing your service so you have to put some security on the router. Every router has a way to access the settings on it through a computer that is hooked up to it. The best option is usually one where you have to input a password to be able to access the service given by the router, so that anyone that tries to connect to it first has to put in the password you assign.
Given the choice between having a wireless connection or having a wired connection, the wired is the best way to go. Since you have a solid (literally) connection you do not have to worry about randomly losing connection or how far it is from the router to the computer. Also it takes less time for information to travel through the wire then to travel through the air. The only downside is that the wires are hard to get from one room to another without being obvious and also damage to the wire is always a risk.
So hope you still have some questions for me and just leave them in the comments. Have a good day