The service invocation approach must be flexible enough to cope with events such as switching frequently between external providers of a similar service without requiring changes to the application.

服务调用方法必须足够灵活以处理一些事件，比如经常在类似服务的外部提供者之间切换，而不需要更改应用程序。

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Another example is switching between providers located in differing geographical or network locations, depending on a time schedule.

另一个例子是根据时间表在位于不同地理位置或网络位置的提供者之间切换。

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Service providers now have the ability with Multiprotocol Label Switching (MPLS) traffic Engineering to constrain network traffic to certain paths.

现在服务提供商可以使用多协议标签交换(MPLS)流量工程将网络流量限制在特定路径中。

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Be careful when switching insurance providers.

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Go inside the switching stations of service providers like Bell Atlantic, and you'll see a hybrid of boxes, some meant for clear and reliable voice traffic and some for uncertain but superfast data flows.

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Consider the above-mentioned fact that nearly nine in ten consumers believe their providers could have prevented them from switching.

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