How do u get the comcast cable modem to work on two computers.. or at least hook them up.?

ok i go this new computer.. and i want to hook up the comcast cable modem so that internat works for both computers.. is there maybe like a double ended ethernet cable or something?.. on the back there are 2 holes.. usb hole.. and the ethernet hole, could i hook up the intrenet through the usb?

How do u get the comcast cable modem to work on two computers.. or at least hook them up.?virus removal

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How do u get the comcast cable modem to work on two computers.. or at least hook them up.?anti virus protection

You need to get a router, which is what gets connected to your modem, and then can split off to many computers (including wireless if you buy a wireless router). You cannot hook up internet through USB (at least not to my current day knowledge).
To your questions, no.

Get a "router" from a company like NetGear, D-Link, etc.

Hook the ethernet cable from the modem to the router.

Run an ethernet cable from the router ports to each computer.

You're done.
You will need to purchase a router. About $40 at any computer or electronic store (or Walmart). You hook the cable from the cable modem into the router. It will have several more ports where you can connect as many PCs as there are ports. Once plugged in, just run the setup CD on each computer.