A network is simply a collection of computers and devices that are connected. Networks can be global, like the Internet, or smaller in scale, such as corporate or home networks. Even that Wi-Fi hotspot at your local coffee shop is part of a network.

Much of what we commonly do on computers and cell phones is actually enabled through networking. This includes Web browsing, e-mailing, instant messaging, and using social media. Networks are also handy for sharing a hardware device, such as a printer, or important files among every computer in a home or office setting.

Behind the scenes, networks comprise devices and systems that require electricity. As networks grow, so do the demand for electricity and the resultant energy and environmental costs.