Switching Internet Connection

Hi, My question today is I have Cable Broadband 3 PC’s close together a Router that I have given up on. At present I use the Network Cables to connect the PC that I am using at the Time PC 1 "“ 2 "“ or 3 to the Modem. I just change the Network cable on the Modem.
I have a USB Switch for my Printer where I manually switch to PC 1 - 2 or 3 for Printing. Is there a switch available to do the same with the Internet connection that I connect the cable modem to the switch with each PC having a Network cable to the switch and then select the PC I want to be connected.
Rather than having all 3 connected at the same time, just like my Printer. Or just like my KVM.
Thanks
Hawk22

 

Print Server

Why not set up the printers as a "network printer "
Only problem is that computer number 1 attached to the printer has to be turned on for the printer to function. It would be the printer server so to speak.
Another option is to buy a "print server" or a router with a "print server ". I know SMC had one.
The "print server" serves as the point that the printer is attached to.
It allows for printing without any of the other computers needed to be on.