Designing Cisco Wireless Enterprise Networks (WIDESIGN, legacy) — Question 18

Which description of the ideal VoWLAN design is true?

Answer options

• A. smaller cells with all data rates enabled to ensure that all clients can associate
• B. larger cells with higher data rates enabled and WPA2 to secure voice conversations
• C. smaller cells with higher data rates enabled and admission control enabled through WMM
• D. smaller cells with higher data rates enabled and no overlap to prevent co-channel interference

Correct answer: D

Explanation

The correct answer is D because having smaller cells with higher data rates and no overlap helps to minimize co-channel interference, which is crucial for maintaining high-quality voice calls over WLAN. Option A is incorrect as enabling all data rates can lead to inefficiencies and increased interference. Option B is not ideal as larger cells may compromise voice quality, and while WPA2 is important for security, it doesn't address the design aspect. Option C, while it mentions WMM, does not specify the importance of avoiding overlap, which is critical for VoWLAN performance.