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I don't think this article is very well-written. It gets confused about whether QUIC has a handshake or not (it does). And it conflates zero round-trip time with combining the TCP/TLS handshakes together.

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I came to mention the same. Diagrams have redundant information, examples are badly picked, there's sentences with little to no value... I don't know if it's lack of care, the author not writing in his native language, or excess of GPT.

> QUIC works on top of UDP. It overcomes the limitations of TCP by using UDP. It’s just a layer or wrapper on top of UDP.

Makes me want to stop reading.

QUIC doesn't have a handshake which is another reason for it being fast

The article says this repeatedly, but it's also wrong about that. QUIC doesn't use exactly the same three-way handshake at the beginning of the session -- but it uses a handshake that lasts at least 3 packets.

https://quic.xargs.org/

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