#1) You need to transfer data from one laptop to another and would like to use an ethernet cable you do not have a hub or switch
Answer: If you do not have a hub or a switch, you can use a router. A Hub is a networking device that allows one to connect multiple PCs to a single network. Hubs may be based on Ethernet, Firewire, or USB connections. A switch is a control unit that turns the flow of electricity on or off in a circuit. It may also be used to route information patterns in streaming electronic data sent over networks. Routers and switches are both computer networking devices that allow one or more computers to be connected to other computers, networked devices, or to other networks. A router directs data in a network. Passes data between home computers, and between computers and the modem.