测试代理程式必须能够建立测试控制器的连出连线。
The test agent needs to be able to make outgoing connection to the test controller.
测试控制器和测试代理程式可以用来产生单一电脑无法产生的多个负载，或用来进行远端测试。
You can use the test controller and test agents to generate more load than a single computer can generate alone or just test remotely.
下图显示可能为多层式应用程式使用测试控制器和测试代理程式执行自动化测试的情形。
The following illustration shows how automated tests might be run for a multi-tier application using a test controller and test agents.
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