WCF Data Servicess do not implement security policies but instead provide the infrastructure required for service developers to write their own security rules and business validation.

WCF数据服务未实现安全策略，而是提供了必需的基础结构，以便服务开发人员编写自己的安全规则和业务验证。

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Reference data calls from web site to WCF service or database take longer time.

参考数据调用从网站到WCF服务或数据库需要一定的时间。

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The data (a JPEG or GIF at this stage but could be a webpage in future) to be shown on the screen is coming from a WCF service running on an external IP address from Internet.

数据(JPEG或GIF在这个阶段，但未来可能是一个网页)在屏幕上显示来自一个WCF服务运行在一个外部IP地址从互联网。

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