For example, where one may use UDP to avoid TCP retransmission after errors, if the entire data must be faultlessly delivered to the application, one needs to actually understand the application. If ...

However, for users who have installed the August 2025 Security Update and are having issues, the advice is to switch to TCP ...

Software implementations of UDP-based application protocols DNS, NTP, TFTP, Echo (RFC862), Chargen (RFC864), and QOTD (RFC865) were specifically found to be vulnerable to such network loops.

TCP is considered the "reliable" protocol because it is connection oriented. But if it's so reliable, why do avionics systems like AFDX use UDP?

The now little-used FTP protocol uses ports 21 and 20. TCP and UDP are lower-level packet protocols whereas HTTP/HTTPS, FTP, and others are higher-level protocols.

The TCP protocol that nearly all applications use—especially the ones sending a lot of data—has a traffic management system built in that is known as congestion control.

UDP’s (and QUIC’s) counterpart in the protocol world is basically TCP (which in combination with the Internet Protocol (IP) makes up the core communication language of the Internet).

For example, where one may use UDP to avoid TCP retransmission after errors, if the entire data must be faultlessly delivered to the application, one needs to actually understand the application. If ...