You can create up to20 equal virtual ports for splitting real ports.

你可以为分割的真实端口最多创建20个对等的虚拟端口。

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There are also virtual test applications that help cloud providers define a number of virtual ports they can use for load testing in a cloud environment.

也有一些虚拟测试应用程序，可帮助定义它们可用于负载测试在云环境中的虚拟端口数的云提供商。

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You need to add virtual hosts definitions to match those ports.

您需要添加虚拟主机定义，以匹配这些端口。

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The Venetian Republic, with its dominance of several strategically important Mediterranean ports, had a virtual monopoly on trades between Europe and Asia.

BBC: In the footsteps of Vasco da Gama