> For the complete documentation index, see [llms.txt](https://http3-explained.haxx.se/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://http3-explained.haxx.se/de/quic/quic-0rtt.md).

# 0-RTT

Um die zum Herstellen einer neuen Verbindung erforderliche Zeit zu verkürzen, kann ein Client, der zuvor eine Verbindung zu einem Server hergestellt hat, bestimmte Parameter dieser Verbindung zwischenspeichern und anschließend eine **0-RTT**-Verbindung mit dem Server herstellen. Auf diese Weise kann der Client Daten sofort senden, ohne auf den Abschluss eines Handshakes warten zu müssen.


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