Exam 220-1001 topic 1 question 297 discussion

Actual exam question from CompTIA's 220-1001

Question #: 297
Topic #: 1

Which of the following wireless networking protocols includes a standardized version of the technology known as beamforming?

A. 802.11a
B. 802.11ac
C. 802.11n
D. Bluetooth
E. Z-Wave

Show Suggested Answer

Suggested Answer: B 🗳️

by nerdtech2021 at June 16, 2021, 8:17 p.m.

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Tirood

2 years, 11 months ago

I agree with B. 802.11ac is a natural expansion of the 802.11n standard.

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DrDoMe

3 years, 3 months ago

Answer is B

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This is similar to Uni-directional and Omni Directional antenna tech. If a access point has beamforming enabled it will provide a uni-directional beam towards recipient wifi device's(laptop/pc etc) location. Very cool! lookup unidirectional and omni directional to get a better idea.

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nerdtech2021

4 years ago

Should be C. 802.11n - Many 802.11n WAPs employ transmit beamforming, a multiple-antenna technology that helps get rid of dead spots— Meyers, Mike. CompTIA A+ Certification All-in-One Exam Guide, Tenth Edition (Exams 220-1001 & 220-1002) (p. 909). McGraw-Hill Education.

upvoted 3 times

[Removed]

3 years, 11 months ago

Beamforming was part of the 802.11n specification — kind of. But it required that both devices — the router and client — supported beamforming in the exact same way. There was no standard way, and device manufacturers were free to invent their own implementations. As a result, it never really took off, as there was no guarantee any 802.11n devices were compatible with each other, even if both supported beamforming. You might have to get devices from the same manufacturer to use this feature, for example. With the 802.11ac specification, this was fixed. There’s a standard way for beamforming to work, and any 802.11ac devices that support beamforming will work with other ones that do. Essentially, 802.11ac devices — like your router and laptop — can communicate with each other and provide information about their relative positions. The correct answer is there 802.11ac

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