Home Network, Seing

My home network is with Verizon Fios, I learned that in this network I experienced and OMG! This lesson I found that I have an enormous of devices that connected to the router. I didn't know that there was a thing known as a modem that takes in internet for the router to send signals to my house. The interesting thing was that i didn't think that too many devices connected to the router can slow the strength of the wifi. While on the subject of the router, I didn't know it was connected to the phone line and we had to pay a large amount of money per year. I suggest everyone should know about the connections before getting the rip off of the network we be getting.