You work as the network administrator at Domain.com. The Domain.com network consists of a single Active Directory domain named Domain.com. All servers on the Domain.com network run Windows Server 2003 and all client computers run Windows XP Professional.
The entire Domain.com users Finance department use both desktop and portable computers. Each computer in the research department has a four-port USB hub for I/O devices.
A Domain.com user named Rory Allen is a member of the Finance department.

One morning Rory Allen purchases and connects a portable USB hard disk to the USB hub attached to his portable computer. However, the port on the USB hub shuts down and the hard disk does not function. The USB hard disk functions properly when it is attached to the USB hub connected to the user’s desktop computer. All other USB devices function properly when they are attached to the portable computer’s USB hub.
What should you do to ensure that the USB hard disk can function properly when connected to the USB hub on the user’s portable computer?

A.
Instruct Rory Allen to replace the USB hard disk’s USB cable with a shorter USB cable.

B.
Assign an IRQ to the USB hub in the computer’s system BIOS.

C.
Instruct Rory Allen to replace the portable computer’s bus-powered USB hub with a self-powered USB hub.

D.
Disable all USB power management features for the USB root hub.

Explanation:
The USB device requires more power than the power that is provided by the USB port on the portable computer. You have to provide a self-powered USB hub or a power supply for the external hard disk in order to solve this problem.