How Computer Networks and the Internet Work: A Simple Explainer

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A computer network operates on principles similar to a postal system, where each device is assigned a unique identifier known as an IP address. Just as a letter must carry the correct recipient address to reach its destination, data packets sent across the internet must include both source and destination IP addresses. Instead of full messages, computers break information into small data packets that travel independently across the network. Routers act like postal carriers, reading destination addresses on each packet and directing them along the most efficient path without needing to inspect the packet's contents. Together, IP addresses, data packets, and routers form the core infrastructure that enables global internet communication.

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ProgrammingDEV Community ·

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