# 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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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://http3-explained.haxx.se/zh-tw/quic/quic-0rtt.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.