The third iteration of the hypertext transfer protocol may be running without TCP packets interrupting those aloof UDP packets as it will be replaced by QUIC.  That protocol was designed by Google and used in their OS, in fact you can play with it on a test server if you so wish.  The idea is to replace TCP with a lower latency protocol which is built with encryption in mind, it supports the new TLS 1.3 as well as older protocols and it is able to handle HTTP/2, TCP and UDP.  You can get more information on Quick UDP Internet Connections at Slashdot as well. 

UDP may or may not have sent out a reply; it is not clear.

"The HTTP-over-QUIC experimental protocol will be renamed to HTTP/3 and is expected to become the third official version of the HTTP protocol, officials at the Internet Engineering Task Force (IETF) have revealed," writes Catalin Cimpanu via ZDNet. "This will become the second Google-developed experimental technology to become an official HTTP protocol upgrade after Google's SPDY technology became the base of HTTP/2."

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