网关的作用就是在应用层实现协议之间的相互转换。
A gateway is utilized to realize the protocol conversion at application level.
该方案工作在应用层，实现简单，解决了实时教学系统中多种教学资源的同步问题，消除了限制实时直播教学应用的技术瓶颈。
The method works in the application layer and it's very simple to implement. It eliminates the practical bottleneck which baffles the application of remote teaching system.
覆盖多播是在应用层实现多播功能，但多播流的分发质量与底层网络的拓扑结构、接入控制机制、路由等有关。
This dissertation is focus on how to improve the quality of flows delivery and the throughput of WMNs by combining overlay multicast with wireless mesh networks.
覆盖多播是在应用层实现多播功能，但多播流的分发质量与底层网络的拓扑结构、接入控制机制、路由等有关。
This dissertation is focus on how to improve the quality of flows delivery and the throughput of WMNs by combining overlay multicast with wireless mesh networks.
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