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You can set up certain computer resources — such as hard drives or printers — so that all computers on the network can access them. For example, the printer attached to Homer’s computer in Figure 1-1 is a shared resource, which means that anyone on the network can use it. Without the network, Bart, Lisa, and Marge would have to buy their own printers.

Hard drives can be shared resources, too. In fact, you must set up a hard drive as a shared resource to share files with other users. Suppose that Bart wants to share a file with Lisa, and a shared hard drive has been set up on Homer’s computer. All Bart has to do is copy his file to the shared hard drive in Homer’s computer and tell Lisa where he put it. Then, when Lisa gets around to it, she can copy the file from Homer’s computer to her own.

You can share other resources, too, such as an Internet connection. In fact, sharing an Internet connection is one of the main reasons why many networks are created.