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TCP vs UDP

The two transport protocols: TCP's connection, ordering, and retransmission (a reliable byte stream) vs UDP's connectionless best-effort datagrams, and which to pick on a constrained device.

24 min read

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5 interview questions on this topic

Each one opens a full worked answer.

What does TCP provide that UDP doesn't?Why is "TCP is a byte stream" a common source of bugs?When would you choose UDP over TCP?Why does TCP cost more on a memory-constrained device?What is head-of-line blocking in TCP, and when does it hurt?

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TCP vs UDP | EmbeddedPrep.io