Computer networks connect devices and computers to share information, resources and services. They can be based on wireless or wired connections, and can be configured in a variety of network topologies. Today, networks are vital for business. They allow us to communicate more effectively, collaborate with colleagues and work more efficiently. They also assist with data security and accessibility.
Computer networking is a broad field that covers the ideation, architecture, creation and maintenance of communication networks. It is a blend of electrical engineering and telecommunications.
The most famous computer network is the Internet which allows millions of users to connect and access the same resources simultaneously. The network employs a packet-switching model to funnel data traffic through a nearly endless number of possible routes and connections. Each packet contains control information as well user information. The control information includes the destination and source network addresses along with error detection codes as well as sequencing information. The payload is contained in the data part of a byte.
In the typical business network there is a central server that stores data and manages user access to essential resources like printers, files and photocopiers. The server is protected with firewalls and multifactor authentication systems to ensure that only authorized users have access to it. Centralizing data on servers allows administrators and network security policy enforcers to conduct regular backups. It also lets employees access corporate services and applications regardless of where they reside including video-calling software and document-sharing.
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