How many devices can a single USB host controller theoretically support?
A)63
B)127
C)255
D)256

Question

Quizplus · Accepted Answer

USB host controllers follow the USB specification, which allows up to 127 devices to be connected to a single USB host controller. However, in practical terms, the number of devices that can be supported depends on factors such as the available power supply and bandwidth limitations. Option A (63 devices) is not correct as it is less than the maximum limit specified by the USB specification. Option C (255 devices) and D (256 devices) are incorrect as they exceed the maximum limit allowed by the USB specification.

How Many Devices Can a Single USB Host Controller Theoretically