QUESTION-WISE · PRELIMS 2011 · Q802

Science & Technology · Prelims 2011 Q802

What is the difference between Bluetooth and Wi-Fi devices?

Attempt in GyanGram Full 2011 paper

Digital Systems Computing Basics Answer A

The question

Stem and options.

What is the difference between Bluetooth and Wi-Fi devices?

Bluetooth uses a 2.4 GHz radio frequency band, whereas-Wi-Fi can use 2.4 GHz or 5 GHz frequency band.

Bluetooth is used for Wireless Local Area Networks WLAN only, whereas Wi-Fi is used for Wireless Wide Area Networks WWAN only.

When information is transmitted between two devices using Blue-tooth technology, the devices have to be in the line of sight of each other, but when Wi-Fi technology is used the devices need not be in the line of sight of each other

The statements a and b given above are correct in this context

Source: UPSC Civil Services Preliminary Examination 2011. Syllabus tags and explanation are GyanGram editorial joins for learning—not official UPSC metadata.

Answer

Correct option A

• Correct Answer: A
• Bluetooth operates on 2.4 GHz; Wi-Fi uses both 2.4 GHz and 5 GHz bands.
• Bluetooth is for WPAN, not WLAN; both use radio waves and do not need line of sight.

Syllabus path

Where this sits in Learn.

Subject

Science & Technology

SNT

Unit

Digital Systems

SNT-U10

Chapter

Computing Basics

SNT-U10-C01

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