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When the USB is connected to a system, its root hub is connected to the ________

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When the USB is connected to a system, its root hub is connected to the ________

(a) PCI BUS

(b) SCSI BUS

(c) Processor BUS

(d) IDE

This question was posed to me during an online exam.

My question is from USB topic in chapter Input/Output Organisation of Computer Architecture

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Best answer
Correct answer is (c) Processor BUS

The explanation is: The USB’s root is connected to the processor directly using the BUS.

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