Define Computer network. Discuss components of a computer network and important WAN technologies.

A computer network is a collection of interconnected devices that communicate and share resources, such as data, software, and hardware. These devices, which include computers, servers, routers, switches, and other peripherals, use a combination of hardware and software to enable data exchange over a medium, such as cables, radio waves, or fiber optics. Networks can vary in size and complexity, ranging from small local area networks (LANs) to extensive wide area networks (WANs) and even the global Internet.

### Components of a Computer Network

A computer network is composed of several essential components that work together to facilitate communication and resource sharing. These components include:

#### 1. Hardware
   - End Devices: These include computers, servers, smartphones, printers, and other devices that directly participate in network communication.
   - Network Interface Card (NIC): A hardware component in each _____ ___ ____ __________ ________.
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