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Question 76 - CWNA-109 discussion

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An AP is advertised as a tri-band, 4x4:4, Wi-Fi 6, 802. 11ax AP. Based on this information and assuming it is correctly advertised, what can be determined as certainly true about this AP?

A.
It supports four channels in 2.4 GHz and 4 channels in 5 GHz
Answers
A.
It supports four channels in 2.4 GHz and 4 channels in 5 GHz
B.
It supports UL-MU-MIMO
Answers
B.
It supports UL-MU-MIMO
C.
It uses a modified OpenWRT firmware
Answers
C.
It uses a modified OpenWRT firmware
D.
It has 4 radio chains
Answers
D.
It has 4 radio chains
Suggested answer: D

Explanation:

Based on the information given, what can be determined as certainly true about this AP is thatit has 4 radio chains. A radio chain is a hardware component that consists of an antenna, a radio frequency (RF) amplifier, and a transceiver. The number of radio chains indicates how many spatial streams an AP can transmit or receive simultaneously using Multiple Input Multiple Output (MIMO) technology. The notation x:y:z in an AP specification denotes the number of radio chains (x), the number of spatial streams (y), and the number of spatial streams per band (z). Therefore, a tri-band, 4x4:4, Wi-Fi 6, 802.11ax AP has four radio chains in each of its three bands (2.4 GHz, low 5 GHz, and high 5 GHz). It also supports four spatial streams in total and four spatial streams per band. It cannot be determined as certainly true that it supports four channels in each band, UL-MU-MIMO, or uses a modified OpenWRT firmware based on the information given.Reference:[CWNP Certified Wireless Network Administrator Official Study Guide: Exam CWNA-109], page 223; [CWNA: Certified Wireless Network Administrator Official Study Guide: Exam CWNA-109], page 213.

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asked 16/09/2024
Roberto Ramadhin
32 questions
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