Knowra Computer network Computer network A system of interconnected computing devices that exchange data and share resources through communication links and protocols. Networks range from small local systems to the global Internet.
Communication protocol : A set of rules that governs how devices format, transmit, and receive messages. Protocols coordinate exchanges between devices that may use different hardware and software.
Network node : A device or connection point that can send, receive, or forward data in a network. Computers, routers, and other endpoints appear as nodes in a network.
Local area network : A network that connects devices across a limited area such as a home, office, or campus. Local area networks connect nearby devices and commonly provide shared access to services.
Circuit switching : A communication method that reserves a dedicated path between endpoints for the duration of a connection. It contrasts with packet switching, which shares links among many data flows.
Network security : The practices and technologies used to protect networked systems and data from unauthorized access or disruption. Shared connectivity creates attack paths that network defenses must manage.
Packet switching : A method of transmitting data by dividing it into packets that travel independently across a network. Most modern networks carry data as packets rather than reserving a continuous circuit.
Network link : A communication path connecting two or more network nodes. Links provide the wired or wireless paths over which network data travels.
Wide area network : A network that connects devices or smaller networks across a large geographic area. Wide area networks link distant sites beyond a single local network.
Client-server model : A computing architecture in which clients request services from centralized servers. This organization contrasts with peer-to-peer networks, where participants can serve one another.
Computer network attack : An attempt to disrupt, damage, or gain unauthorized access to networked systems or data. Interconnected systems can expose multiple devices and services to coordinated attacks.
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