本质上，Download Exchang只是网络上常见的横幅广告和链接交换服务应用的升级版本。
At its core, Download exchange is basically a more sophisticated version of the many banner and link exchange services that are very common on the Web.
该方案可以在不改变现存办公室网络基础设施的条件下，提供安全的数据交换服务。
That solution can provide service on security data exchange without any need to change the office network infrastructure.
资源的分配和有效使用是实现应用网络流多服务转发或交换服务的关键。
How to manage resources is the key issue for implementation of multiservice switching or forwarding.
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