TCP is extremely reliable, and is used for everything from surfing the web (HTTP), sending emails (SMTP), and transferring files (FTP). TCP, or Transmission Control Protocol, is the most common networking protocol online. Here's a brief comparison between the two: Sourceįor an even higher-level overview of how the internet works, check out this five minute video: What is TCP? And whenever two devices communicate over the internet, they're likely using either TCP or UDP to do so. Both TCP and UDP are major protocols within the internet protocol suite: SourceĮach device that's connected to the internet has a unique IP address. The internet protocol suite is a collection of different protocols, or methods, for devices to communicate with each other. Each device, whether it's your smartphone or a server, communicate through the internet protocol suite. Generally speaking, the internet is a network of connecting devices. Computer Networking Basicsīefore diving into how TCP and UDP work, it's helpful to know the basics about how the internet works. ![]() In this article, we'll go over computer networking basics, the differences between TCP and UDP, when each is used, and more. TCP and UDP are different methods to send information across the internet.īut even knowing what they stand for, it's hard to know which protocol you should use, or why you would use one over the other. TCP, which stands for Transmission Control Protocol, and UDP, or User Datagram Protocol, are part of the internet protocol suite. If you're getting into computer networking, or if you've dug through the network settings of some applications, you've likely seen these terms: TCP and UDP.
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