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

HTTP/3 breaks from HTTP/2 by adopting the QUIC protocol over TCP. Here's a first look at the new standard and what it means for web developers.

Next, you learn about the 4-layer IP stack and differences between the transport-layer protocols Transmission Control Protocol (TCP) and User Datagram Protocol (UDP).