# Broker

- [\[深入淺出MQTT\]:  v3.1.1與v5 的差異](https://xiang753017.gitbook.io/zixiang-blog/broker/shen-ru-qian-chu-mqttv3.1.1-yu-v5-de-cha-yi.md): MQTT v3.1.1 與 v5 完全相容，且提供許多Cluster 所需要的功能，如Shared Subscriptions、 User Properties等實用功能，且不會因為新增加功能造成效能低落的問題。
- [Broker 到底是什麼？](https://xiang753017.gitbook.io/zixiang-blog/broker/broker-dao-di-shi-shen-me.md): 市面上 Broker 百百種，最有名的應該是message Queue，如MQTT、RabbitMQ、Kafka等。可是很少人知道Broker其實指軟體設計的架構。事實上很多時候在撰寫的軟體的時候也寫了Broker 只是不知道它是broker。


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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://xiang753017.gitbook.io/zixiang-blog/broker.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.