What is the key difference between TCP and UDP?

Question

Accepted Answer

TCP is connection-oriented and reliable; UDP is connectionless and best-effort — TCP sets up a connection and guarantees ordered, reliable delivery; UDP just fires packets with no setup or guarantees. The second option reverses them, and neither protocol is defined by encryption or by being limited to local versus internet use.

Answer

TCP is connectionless and best-effort; UDP is connection-oriented and reliable

Answer

TCP is encrypted end-to-end; UDP is unencrypted and therefore always faster

Answer

TCP works only on local networks; UDP works only across the public internet

What is the key difference between TCP and UDP?

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