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单项选择题A retail customer installs a BladeCenter into an existing 10/100 Ethernet network. Due to cost considerations, the customer uses Copper Pass-thru Modules. After installing this solution, the customer finds that they have no network connectivity. Which of the following at is causing the problem?（）

A、Copper Pass-thru Modules only support 1000Mb line speeds. 

B、Spanning Tree has been enabled on the Copper Pass-thru Module. 

C、The customer does not have the latest firmware loaded on the Copper Pass-thru Module. 

D、The customer is using LS21 Blades 

  • A

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