Exam 220-1101 topic 1 question 7 discussion

simplest explanation

It's A, because some channels are reserved for specific use.

It should be A no reason for it to be closed off if it wasn't reserved for a different use.

I think A

The 2. band is subdivided into up to 14 channels, spaced at 5 MHz intervals from 2412 MHz up to 2484 MHz. Wi-Fi requires bandwidth of approximately 20 MHz, not 5 MHz. Consequently, a site designer needs to choose the channels that do not overlap. On a WLAN where only the first 11 channels are available, channels 1, 6, and 11 can be selected as non-overlapping. Note: In the Americas, regulations permit the use of channels 1-11 only, while in Europe, channels 1-13 are permitted. In Japan, all 14 channels are permitted. Those channels are reserved.

If the identified channel with minimal RF pollution can't be selected, it's possible that the channel is within a licensed band and cannot be used without the appropriate licensing or authorization. In many cases, certain channels within the RF spectrum are reserved for licensed and regulated uses, such as by government agencies, telecommunications providers, or other authorized entities. These channels are typically not available for use by unlicensed or consumer-grade wireless devices.

correct answer:C If the channel was reserved for licensed band use, it would typically not appear as available for selection at all

I have checked on other sites that provide Comptia A+ exam questions and also checked with Chat GPT. The correct answer is A.

I have my exam on wednesday i am pretty confident but these stupid questions are what get me. any advice guys?

pls confirm option A or C, i am taking exam next week

According to the Comptia book A+, long-range fixed wireless can be implemented using licensed or unlicensed frequency spectrum. Licensed means that the network operator acquires the exclusive right to use a frequency band within a given geographic area from the regulator. The US regulator is the Federal Communications Commission (FCC). If any source of interference is discovered, the network operator has the legal right to shut it down.

Selected answer is A

Licensed band use means the medium can be accessed or used only by the owner of the license. It must be paid for. So I think the answer is A because the user can not use that frequency because they are not paying for the license to use it. They are not using a carrier. The words "non carrier grade" makes me think of "licensed". What do they mean by vendor? The ISP or the maker of the router?

The 2. band is subdivided into up to 14 channels, spaced at 5 MHz intervals from 2412 MHz up to 2484 MHz. Wi-Fi requires bandwidth of approximately 20 MHz, not 5 MHz. Consequently, a site designer needs to choose the channels that do not overlap. On a WLAN where only the first 11 channels are available, channels 1, 6, and 11 can be selected as non-overlapping. Note: In the Americas, regulations permit the use of channels 1-11 only, while in Europe, channels 1-13 are permitted. In Japan, all 14 channels are permitted.

Easiest explanation why its A, text says non-carrier-grade, this means it cant use licensed band. Also C and D are not permitted by law. It could be B though. https://en.wikipedia.org/wiki/Carrier_grade https://en.wikipedia.org/wiki/Spectrum_management

selected c

For the last sentence I meant a,b,d.