在此方案中，服务将消息发送到邮箱端点，而不是采用保留消息的方式。
In this scenario, the service sends the messages to a mailbox endpoint rather than holding onto the messages.
其原因在于通道代理会保留消息描述符的内容，它会设置所有字段以匹配来自发送队列管理器的消息。
The reason for this is that the channel agent will preserve the contents of the message descriptor by setting all the fields to match the message from the sending queue manager.
RSVP消息以IP数据报文的形式发送，路由器保留“软状态”，由周期性保留消息进行刷新。
RSVP messages are sent as IP datagrams, and the router keeps "soft state", which is refreshed by periodic reservation messages.
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