What is a computer network?

Computer networks are systems that connect two or more computers or devices to share resources, data, and applications. These networks can range from small local area networks (LANs) in homes or offices to large wide area networks (WANs) that span cities or countries. Computer networks enable communication, file sharing, internet access, and the use of shared devices like printers. They play a crucial role in business operations, education, and daily life by facilitating connectivity and collaboration.