Go back to 642-586 - AWLANSE - Cisco Advanced Wireless LAN for System Engineers Exam

Question :-

A customer brings you a previously completed site survey for the initial wireless implementation from 12 months ago. The customer currently has six access points deployed in the warehouse. The survey shows that the installed coverage provides for a 15-percent overlap between cells at 5.5 Mbps, and a 5-percent overlap at 11 Mbps. This solution has proved to provide adequate coverage and roaming capabilities for the data applications.Why would this site survey not be adequate for a VoIP application?
inadequate QoS
inadequate overlap
inadequate data rate
inadequate throughput

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