单项选择题

A technician cannot connect using Remote Desktop. Which of the following ports needs to be allowed in the firewall？（）

A.23
B.443
C.8080
D.3389

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A client has called with concerns that their computer problem has not been resolved by the onsite technician who has left. As the technicians supervisor， which of the following is the BEST course of action in this situation？（）

A.Tell the client that they will need to place another service call.
B.Ask the client if they would like to discuss their computer problems in more detail.
C.Tell the client that another technician will be sent out.
D.Inform the client that the problem will be resolved by the onsite technician at another time.

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A client has been unable to fix corruption of system files and does not have a backup or an Automated System Recovery （ASR） disk. Which of the following is the BEST action to take next？（）

A.Copy the missing file from another computer and reboot.
B.Execute a Windows repair from the Windows setup media.
C.Boot into the Recovery Console and execute FIXBOOT.
D.Reboot and press the F2 key when prompted.

A technician cannot connect using Remote Desktop. Which of the following ports needs to be allowed in the firewall？ （）

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A technician cannot connect using Remote Desktop. Which of the following ports needs to be allowed in the firewall？（）