Transmission Control Protocol (TCP) and User Datagram Protocol (UDP) are the two primary protocols used to send data across the internet, operating at the Transport Layer of the networking model. The core difference lies in their priorities: TCP focuses on reliability and accuracy, ensuring every piece of data arrives perfectly in order, while UDP prioritizes speed and efficiency, sending data quickly without double-checking if it arrived.
You should choose TCP anytime your application cannot tolerate missing, corrupted, or out-of-order data. Deep Dive: TCP vs. UDP
To understand why TCP is reliable, it helps to look at how both protocols handle data delivery under the hood. TCP or UDP? Every Developer Must Know This
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