On 5/27/2021 12:42 AM, Hal Murray wrote:
TCP is for things like FTP and web browsing - transferring large chunks of data. UDP is for simple things like NTP or DNS. TCP is generally implemented in the kernel. UDP retransmissions are generally implemented by user code.
UDP is also for unicast where late is just as bad as never. I've got an IoT sensor that unicasts readings to a PC that uses UDP in a 2-host network.
Compare to FireWire's isochronous connections that send unicast packets at a regular rate, intended for streaming media and commonly used for cameras.
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