300-425 · Question #105
300-425 Question #105: Real Exam Question with Answer & Explanation
The correct answer is B: 5 GHz frequency band without channel bonding, to support 20 MHz channels. To avoid interference you have to have a higher SNR as possible. While doing Channel bonding you add noise. Besides, high wireless clients concentration demand needs to have a high SNR and to avoid Co-Channel interference. I quote: "One of the hallmarks of a high-performing WLAN
Question
Options
- A5 GHz frequency band with channel bonding, to support 40 MHz channels
- B5 GHz frequency band without channel bonding, to support 20 MHz channels
- C5 GHz frequency band with channel bonding, to support 80 MHz channels
- D2.4 GHz frequency band without channel bonding to support 20 MHz channels
Explanation
To avoid interference you have to have a higher SNR as possible. While doing Channel bonding you add noise. Besides, high wireless clients concentration demand needs to have a high SNR and to avoid Co-Channel interference. I quote: "One of the hallmarks of a high-performing WLAN is channel reuse. This is the practice of deploying channels in such a manner that they limit the amount if CCI introduced into the environment. The best way to achieve this is by having as many channels to deploy as possible. While a 20MHz channel will not achieve the higher data rates that are advertised with 80MHz, clients can still reach acceptable speeds, allowing you to optimally use each bit of available airtime."
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