HTTP/3 is the next Internet network protocol and is intended to partially replace HTTP/1 and HTTP/2. One month before the next meeting of the QUIC working group in Zurich in February, it might be useful to look at what HTTP/3 promises and what its current client/server support looks like.
HTTP/3 promises to make internet connections buy phone number list faster, more reliable and more secure. Born as "HTTP over QUIC", an attempt to adapt the HTTP protocol to run in addition to Google's own transport layer protocol, QUIC, was later proposed as an IETF standard and is currently an internet project. In October 2018, IETF HTTP and QUIC Co-Chair Mark Nottingham proposed renaming HTTP over QUIC to HTTP/3 to clarify its true nature and independence from QUIC.
QUIC is a key element of HTTP/3 because it provides the foundation for its core functionality. Built on top of UDP, QUIC tries to address major issues with TCP, such as connection setup latency and loss of multithreaded packets. TCP's latency problem stems from the requirements of its congestion control algorithm, which requires a slow start to estimate the amount of traffic that can be sent before congestion occurs. In HTTP/1.0, this is compounded by the fact that each TCP request/response exchange is assigned a new connection, which results in a slow startup penalty.
Since then, the attempt to circumvent the slow start of TCP has been at the heart of consistent efforts to improve the HTTP protocol.