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Google Classroom The Internet is the world's largest computer network. Let's break that down: A computer network is any group of interconnected computing devices capable of sending or receiving data. A computing device isn't just a computer—it's any device that can run a program, such as a tablet, phone, or smart sensor. Building a network The simplest computer network is two devices: A diagram of the simplest computer network. Two computers are shown with a line connecting them. A network like that only has to worry about a few things, like how to physically connect the two devices and how to send data over the physical connection in a format they both understand. Let's add one more device: A diagram of a simple computer network. Three computers are shown with a line from one computer to the next. Now there's additional complexity. How can each device know whether incoming data is meant for them or for their neighbor? This simple network will need an addr