If you’re considering buying coaxial cable splitters, don’t buy them to split Internet connections. I tried doing that and it doesn’t work. Basically I had two computers and wanted to share my cable Internet connection between both of them.
I had a cable modem for each computer and ran one coaxial cable from each splitter connection into the back of each modem and tried in vain to get Internet signals into each PC.
It doesn’t work. One computer got the signal, but the other didn’t, and sometimes vice-versa. It turns out you need a router; actually I called the cable company and they didn’t even suggest that, they told me you need a second cable account for the second line.
I said, forget that, and went back to using one computer. Eventually I got a wireless router and had my second computer pick up the signal that way.