An Ethernet cable has 8 wires but only 4 are used. Can I use the other 4 to feed another computer? - Quora
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Amazon.com: Cat 8 Ethernet Cable, GLANICS Outdoor&Indoor 5 ft Internet Lan Cable, High Speed Network Cables with Rj45 Connector for Router, Modem, Switch, Gaming, Xbox, PS5, PS4 (Black) : Electronics
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How to Make Four Pair an Ethernet Cable For Internet Connection - YouTube