A computer network connects two or more devices, such as computers, printers, and servers, to share data, resources, and services using physical cables or wireless signals. These networks enable communication, collaboration, and resource sharing, ranging from small local area networks (LANs) to the expansive global Internet. Key components include nodes (devices like computers and printers), links (cables or Wi-Fi), networking devices (routers and switches), and protocols (rules for data exchange). How Computer Networks Work 1. Interconnection: Devices are connected through physical cables (like Ethernet or fiber optic) or wireless technologies (like Wi-Fi). 2. Communication: Once connected, these devices use agreed-upon rules, called communication protocols (like TCP/IP), to send and receive data in the form of packets. 3. Data Exchange: Data is transferred between devices, allowing users to send messages, share files, and access applications or hardware. Key Components of a Netw...