Designing Cisco Enterprise Wireless Networks (ENWLSD) — Question 113

A customer deploys a new Cisco high-density wireless network within the open areas of a mall to provide free public wireless on 5 GHz. The existing mall tenants have their own wireless networks that are independently managed. Which design approach minimizes channel utilization for the public network?

Answer options

• A. Enable all 5-GHz channels that are supported by the region and use 40-MHz channels.
• B. Enable UNII-1 channels only and use 80-MHz channels.
• C. Enable UNII-1 channels only and use 20-MHz channels.
• D. Enable all 5-GHz channels that are supported by the region and use 20-MHz channels.

Correct answer: D

Explanation

The correct answer, D, minimizes channel utilization by using 20-MHz channels, which allows for more channels to be available and reduces interference. Options A and B use wider 40-MHz and 80-MHz channels, respectively, which can lead to increased channel utilization and potential interference with other networks. Option C, while using 20-MHz channels, limits the channels to UNII-1 only, which may not provide optimal performance in a crowded environment.