Which statement regarding the USB standard and USB devices is accurate?
A) up to 64 USB devices can be daisy chained together
B) USB uses parallel data transmissions
C) a USB cable has four wires, two for power and two for communication
D) USB devices must supply their own power

Question

Quizplus · Accepted Answer

A USB cable has four wires, two for power (5V and ground) and two for communication (data+ and data-).

Answer: D
 USB devices can either be bus-powered (drawing power from the USB port) or self-powered (using an external power source). However, there are some USB devices that may require additional power from an external source even if they are bus-powered.

Option A is incorrect as a maximum of 127 devices can be connected in a USB network. Option B is incorrect as USB uses serial data transmissions.

Which Statement Regarding the USB Standard and USB Devices Is