Deal of The Day! Hurry Up, Grab the Special Discount - Save 25% - Ends In 00:00:00 Coupon code: SAVE25
Welcome to Pass4Success

- Free Preparation Discussions
Mail Us support@pass4success.com
Location US
Mob_nav_barsMENU

Cisco 350-101 Exam - Topic 4 Question 9 Discussion

What is used for measuring gain on a Wi-Fi antenna?
B) decibels relative to dBi
A) length of the antenna
C) voltage against dBm
D) blend of analog and digital signals

Cisco 350-101 Exam - Topic 4 Question 9 Discussion

Actual exam question for Cisco's 350-101 exam
Question #: 9
Topic #: 4
[All 350-101 Questions]

What is used for measuring gain on a Wi-Fi antenna?

Show Suggested Answer Hide Answer
Suggested Answer: B

Wi-Fi antenna gain is measured in dBi, meaning decibels referenced to an isotropic radiator. Cisco's Wireless RF Reference Guide states that antennas have gain measured in decibels relative to isotropic gain, or dBi, and further explains that antenna gain is a ratio comparing the gain of a specific antenna to a theoretical isotropic antenna. Cisco's RF design documentation also defines dBi as the power gain rating of antennas, where real antennas are compared to an isotropic antenna that radiates the same power density equally in all directions.

Option B is therefore the correct selection, although the technically precise phrase is decibels relative to isotropic, abbreviated dBi. Antenna length can influence resonance and design, but it is not the measurement unit for gain. Voltage against dBm is incorrect because dBm references absolute power relative to 1 milliwatt, not antenna gain. Analog/digital signal blending is unrelated to RF antenna performance. Reference topics: RF Fundamentals --- antenna gain, dBi, isotropic radiator, EIRP, antenna patterns, and WLAN RF design.


by Deonna at Jun 27, 2026, 11:09 PM

Limited Time Offer

25%

Off

Get Premium 350-101 Questions as Interactive Web-Based Practice Test or PDF

Contribute your Thoughts:

0/2000 characters
Submit Cancel
Florencia
3 days ago
D) blend of analog and digital signals? Totally irrelevant here.
upvoted 0 times
...
Kattie
8 days ago
C) voltage against dBm? Nah, that’s not right for gain.
upvoted 0 times
...
Micheline
13 days ago
A) length of the antenna could matter, but not as much as dBi.
upvoted 0 times
...
Rory
18 days ago
Agreed! dBi is standard for antennas. Very clear.
upvoted 0 times
...
Loreta
24 days ago
I think it's B) decibels relative to dBi. Makes sense for gain measurement.
upvoted 0 times
...
Cheryl
29 days ago
Totally agree with B! That's the standard measure.
upvoted 0 times
...
Dalene
1 month ago
Wait, are we sure it's not C? Sounds kinda legit.
upvoted 0 times
...
Rolland
1 month ago
B makes the most sense, right?
upvoted 0 times
...
Alethea
1 month ago
I thought it was A) length of the antenna?
upvoted 0 times
...
Becky
2 months ago
It's definitely B) decibels relative to dBi.
upvoted 0 times
...
Arlie
2 months ago
I don't think voltage against dBm is correct for measuring gain; it seems more about the antenna's efficiency in dBi.
upvoted 0 times
...
Deane
2 months ago
I feel like the length of the antenna might play a role, but I can't recall if it's the main measurement for gain.
upvoted 0 times
...
Art
2 months ago
I remember practicing a question about antenna gain, and I think it was definitely related to dBi.
upvoted 0 times
...
Malinda
2 months ago
I think gain is usually measured in decibels, but I'm not sure if it's specifically dBi or dBm.
upvoted 0 times
...

Save Cancel