注册请求和注册应答消息通过知名端口号434发送。

This is done through exchange of a Registration Request and Registration Reply messages (which are sent with UDP using well known port number 434).

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经由注册的请求-应答（Request-response via the registry）：“架构内用到了一个可选的服务注册，可以帮助客户端自动配置它的服务客户端的某些方面。

Request-response via the registry: "An optional service registry can be used within the architecture to help the client automatically configure certain aspects of its service client.

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