Data flows across the internet through a series of interconnected networks using the TCP/IP (Transmission Control Protocol/Internet Protocol) suite. When a user initiates communication, data is segmented into packets at the transport layer (TCP), and each packet is assigned a destination address. The packets then travel through the network layer, where routers determine the most efficient path based on IP addresses. At the data link layer, the packets are encapsulated into frames with source and destination MAC addresses. The frames traverse the physical layer, transmitted over cables or wireless connections. As the packets reach their destination, they are successively unpacked at each layer, ensuring the accurate and orderly reconstruction of the original data. This process enables seamless communication and data exchange across the vast and interconnected network infrastructure that constitutes the internet.