Which computer network component allows data transfers from one computer to another through a telephone line? Nathan is setting up a computer network in his house. He has been reading up about computer networks and their different components. One day, he decides to quiz his friend’s knowledge about computer networks. He asks them to name a computer network component that allows data to transfer from one computer to another through a telephone line. Greg replied that was is a hub, and Sara said that it is a switch. Dennis answered that it was a modem, and Mel said that it is a switch.