单项选择题 A technician who separated two departments using VLANs now discovers that the VLANs cannot communicate with each other. Which of the following does the technician need to enable communication between the VLANs?（）

单项选择题 Which of the following would be used to connect two IDFs in the same building with the LAN, whileminimizing crosstalk?（）

单项选择题 Which of the following protocols uses UDP to transfer files?（）