在一个流量控制系统中同时设计实现确保服务、奖赏服务、尽力而为服务三种业务类型，可以同时满足不同的流量控制需求。
The traffic control system have Premium Services and Assured Services and Best Effort Service, it can meet different traffic control requirements.
网络提供者们不担保某种程度的服务质量，仅承诺将尽力而为，这可能对个人电邮不算什么，但是对时间敏感的数据比如视频就很重要了。
Network providers do not guarantee a certain quality of service, but merely promise to do their best. That may not matter for personal e-mails, but it does for time-sensitive data such as video.
然而，传统的因特网提供的是一种尽力而为的服务。
However, traditional service provided by Internet is a kind of best effort service.
传统的尽力而为的服务不能满足这些高端网络应用的要求。
The best effort service is no longer adequate for these applications.
层次式交换网络支持三种类型服务：虚拟专线业务、确保服务和尽力而为。
The QoS model for HSNet includes three sorts of service: virtual leased line, assured forwarding and best effort.
传统IP网络所支持的基本服务模型只有一种：尽力而为，对任何IP包都不加区别地按FIFO方式进行服务。
The traditional IP network only supports single service model that is the Best-Effort in which any packet is transmitted in the way of FIFO.
随着各种新兴业务的开展，IP网络尽力而为的服务方式无法满足网络中很多业务，特别是实时业务的服务需求。
With the development of rising services , the Best Effort service of IP network can't satisfy much services, especially the real time services.
随着各种新兴业务的开展，IP网络尽力而为的服务方式无法满足网络中很多业务，特别是实时业务的服务需求。
With the development of rising services , the Best Effort service of IP network can't satisfy much services, especially the real time services.
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