ITPEC IP April 2023 Question 10
Which of the following is a standard for wireless communication between a PC and peripheral devices?
Explanation
Bluetooth — a short-range radio standard that connects a PC with peripherals such as keyboards, mice and headsets without cables.
Bluetooth uses the 2.4 GHz radio band over a range of about 10 m and needs no line of sight between the devices. Once paired, a peripheral works as if it were connected by cable. The other three options are all wired.
Answer (a)
Why not others:
- •(b) IEEE 1394 — a wired serial interface (FireWire), used for video cameras and external disks
- •(c) PCI — an internal bus whose slots on the motherboard take expansion cards installed inside the PC
- •(d) USB 3.2 — a wired serial interface; the peripheral connects by cable
Key rule: Wireless interfaces: Bluetooth (radio), IrDA (infrared), NFC; wired serial interfaces: USB, IEEE 1394, HDMI; PCI and PCI Express are internal expansion buses.
Computer Component · AI-written, may contain errors
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