How does one decide between TCP and UDP? This question was originally answered on Quora by Keith Winstein.

Optimizing a VPN isn't just about picking a protocol - choosing UDP or TCP can make a big difference, too.

According to this group, starting with February 1, 2020, DNS servers that can't handle DNS queries over both UDP and TCP may be pushed out of the DNS ecosystem and stop working.

The advantage to using TCP for transporting the control protocol is that you’re guaranteed the control information is delivered. On the other hand, you also could use UDP if the protocol is ...

In this paper, the authors purpose to analysis packets of TCP and UDP while sending an e-mail using a tool called wireshark. Wireshark is a free and open-source packet analyzer.

Scott Reeves shares the wireshark filters that helps you isolate TCP and UDP traffic.

TCP/IP will throttle back if it thinks a connection is being flooded. You also get no compression with UDP, but you said packet size is not an issue.<P>Are you using port trunking?

27 under udp is part of smtp, rather esmtp - pop mail service of SLMail. If it is port 27, it is TCP NSW (National Software Works).<BR><BR>Port 20670 I thought was one of the old gaming ports but ...