Overview
Direct Answer
A computer network is a collection of interconnected computing devices that exchange data and share resources through standardised communication protocols. Networks range from small local area networks (LANs) within a single building to wide area networks (WANs) spanning geographical regions.
How It Works
Devices connect via physical media (Ethernet cables, fibre optics, wireless signals) or virtual connections, with data transmitted in packets across network layers defined by protocol stacks such as TCP/IP. Routers and switches direct traffic between nodes, whilst DNS and DHCP services manage addressing and name resolution, enabling devices to locate and communicate with one another reliably.
Why It Matters
Networks enable resource sharing—printers, storage, applications—reducing hardware costs and improving operational efficiency. They facilitate real-time collaboration across distributed teams and support critical business continuity through data centralisation and redundancy, which are essential for compliance and disaster recovery in regulated industries.
Common Applications
Enterprise LANs connect office workstations and servers; cloud infrastructure relies on WAN connectivity; data centres use high-speed networks for load balancing; educational institutions implement campus-wide networks for student and staff access; manufacturing facilities deploy industrial networks for machine-to-machine communication.
Key Considerations
Security vulnerabilities increase with network complexity and connectivity breadth, requiring robust firewalls, encryption, and access controls. Network performance degrades under congestion, necessitating capacity planning and quality-of-service configurations to prioritise critical traffic.
Referenced By5 terms mention Computer Network
Other entries in the wiki whose definition references Computer Network — useful for understanding how this concept connects across Networking & Communications and adjacent domains.
More in Networking & Communications
NAT
Protocols & StandardsNetwork Address Translation — a method of mapping one IP address space into another by modifying packet headers.
Reverse Proxy
InfrastructureA server that sits in front of web servers and forwards client requests to the appropriate backend server.
Packet Sniffing
Protocols & StandardsThe process of capturing and analysing data packets travelling across a network for monitoring or troubleshooting.
Quality of Service
Protocols & StandardsNetwork management techniques that prioritise certain types of traffic to ensure consistent performance.
SD-WAN
InfrastructureSoftware-Defined Wide Area Network — a virtualised network architecture that enables centralised management of geographically distributed networks.
Network Function Virtualisation
Cloud NetworkingReplacing dedicated network hardware with software running on commodity servers.
Network Topology
Protocols & StandardsThe arrangement of elements such as nodes, links, and devices in a computer network.
mTLS
Protocols & StandardsMutual Transport Layer Security — a protocol where both client and server authenticate each other using certificates.