> 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/zh-tw/quic/quic-0rtt.md).

# 0-RTT

為了減少建立新連接所需的時間，曾連接到該伺服器端的客戶端會緩存某些參數，並使用這些參數與伺服器端建立 **0-RTT** 連接。 這樣，客戶端可以立即發送資料，而不必等待交握的動作完成。


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