A computer network is a system that connects multiple computers and other devices to share resources and communicate with each other. Networks can be small, like a home network with a few devices, or large, like global networks such as the Internet. They

A computer network is a system that connects multiple computers and other devices to share resources and communicate with each other. Networks can be small, like a home network with a few devices, or large, like global networks such as the Internet. They use various hardware (like routers, switches, and cables) and software (such as protocols and operating systems) to facilitate communication. Networks allow sharing of data, files, and resources like printers and internet connections among connected devices. They enable communication via email, messaging, video conferencing, and file sharing, enhancing collaboration and productivity. Networks can be classified by size (LANs, MANs, WANs), technology (wired or wireless), or purpose (public or private). Common network protocols include TCP/IP, which governs how data is transmitted across networks ensuring reliability and integrity. Security measures like firewalls, encryption, and authentication protect networks from unauthorized access and cyber threats. Network administrators manage and maintain networks, ensuring they operate efficiently and securely. The Internet is a global network connecting millions of private, public, academic, business, and government networks worldwide. Cloud computing relies on networks to deliver on-demand computing resources and services over the Internet. Network performance is measured by bandwidth (data transfer rate) and latency (delay in data transmission), crucial for speed and reliability. Wireless networks use radio waves to connect devices, providing flexibility in device placement and mobility. Network topologies (like star, bus, and mesh) define how devices are interconnected, influencing network efficiency and scalability. Virtual Private Networks (VPNs) create secure connections over public networks, enabling remote access and privacy. Network redundancy ensures reliability by providing alternate paths for data transmission, minimizing downtime. DNS translates domain names into IP addresses, facilitating web browsing and communication over the Internet. Network segmentation divides networks into smaller parts to enhance security, manage traffic, and simplify administration. Emerging technologies like 5G promise faster speeds and lower latency, supporting more advanced applications and services. Understanding networks is essential in today's interconnected world, driving communication, commerce, and innovation globally.