Computer networks permit sharing and central management of resources, applications and information across many devices, in a safe and scalable manner. Computer networks are a vital part of our modern world and provide numerous benefits, including improved collaboration and communication as well as reduced costs, improved security and improved access to information and resources.

Networks are made up of two primary elements, links and nodes. Nodes are network devices, such as printers, computers, and file servers that can communicate with one another using a set of standardized rules called communication protocols. Links connect these nodes through optical or wired connections. A laptop that connects to a local network using Wi-Fi is a node and links. The routers and switches function as traffic cops that direct data packets efficiently to get them to their destination.

A wide-area network (WAN) makes use of gateways and bridges to connect a variety of local area networks. Unlike a LAN it is connected to the Internet and other networks for global communication. Students in Florida for instance, can teleconference on their workstations with classmates in Tokyo because of the network called a WAN.

Computer networks help streamline work processes and create a interactive and productive workplace. For example employees can save documents to a server that is regularly backed up on an ongoing basis, rather than sending documents back and forth, which can result in the loss of files. They can also access the most current versions of employee or customer manuals on the network. This ensures consistency and accuracy.

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