消息提供程序通过网络连接在进程之间可靠地传输消息。
The messaging provider transports messages reliably between processes, across network connections.
许多提供程序都支持多种传输。
There are a number of providers supporting multiple transports.
协议异构性：此异构性是指用来访问由各种应用程序提供的服务的不同传输协议。
Protocol heterogeneity: This heterogeneity refers to the different transport protocols being used to access the services offered by various applications.
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