As internet world evolving speedly right now and continuous progress towards improving data transmission over internet protocols which resulted in introducing a brand new HTTP/3 built over Google-proposed QUIC (Quick UDP Internet Connections).
QUIC adds a layer on top of UDP (User Datagram Protocol) because UDP is not reliable transport. QUIC a altered complete version of UDP have same features as TCP alongside offers retransmissions of packets, latency improvements and other new features for reliability.