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Module 2: x86 Architecture, CPU Control, I/O, Memory System Design

20252m

USB is an example of:
(i) Networking device
(ii) Storage device only
(iii) Standard I/O interface
(iv) Wireless protocol

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Answer: (iii) Standard I/O interface — USB (2 Marks)

Correct choice is (iii) Standard I/O interface.

  • USB (Universal Serial Bus) is the de-facto standard I/O interface for connecting peripherals (keyboard, mouse, storage, printer) to computer, hot-pluggable, serial, host-controlled.
  • Features: 4-wire (Vcc/Gnd/D+/D-), differential signaling, tiered-star topology via hubs, up to 127 devices, versions 2.0/3.0/3.1 with 480 Mbps – 10 Gbps.
  • Replaces legacy serial/parallel ports as universal I/O bus — hence option (iii).

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