A network is a system of interconnected devices (computers, servers, routers, etc.) that communicate and share resources through wired or wireless connections using standardized communication protocols.

Elaboration:

A network allows devices to exchange data, share files, printers, and resources, and connect to the internet. Networking enables communication between computers, mobile phones, IoT devices, and servers in various locations.

Networks can be classified based on their geographical span:

• Personal Area Network (PAN) – Small-scale, connecting personal devices like Bluetooth headsets and smartphones.
• Local Area Network (LAN) – Covers a limited area, such as an office or home, using Ethernet or Wi-Fi.
• Metropolitan Area Network (MAN) – Spans a city, often provided by telecom companies.
• Wide Area Network (WAN) – Covers large areas like countries or continents; the internet is the largest WAN.

Networking is essential for businesses, cloud computing, remote work, and online services. Security measures such as firewalls, encryption, and VPNs are used to protect networks from cyber threats.