TCP (Transmission Control Protocol) and UDP (User Datagram Protocol) are both core internet protocols for data transfer, but they differ significantly in their approach to reliability and speed.
TCP establishes a reliable, connection-oriented communication channel before data transmission. It ensures data arrives in the correct order and without errors through mechanisms like acknowledgments, retransmissions, and flow control. This makes TCP ideal for applications where data integrity is paramount, such as web browsing, email, and file transfers.
UDP offers a faster, connectionless service. It sends data packets without establishing a prior connection or guaranteeing delivery, order, or error checking. This lack of overhead makes UDP suitable for real-time applications like video streaming, online gaming, and DNS lookups, where speed is more critical than absolute reliability, and occasional data loss is acceptable.
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