300-360 Question #72: Real Exam Question with Answer & Explanation

The correct answer is A: The edge of the cell should be -67 dBm.. Cisco's standard recommendation for VoWLAN deployments is that the edge of each AP's cell should measure at least -67 dBm. This ensures that as a client roams toward the boundary of one AP's coverage area, it still maintains a strong enough signal to support the quality of servic

Question

An engineer has been assigned the task of deciding the cell overlap for a wireless voice deployment. Which Cisco measurement recommendation should be considered?

Options

AThe edge of the cell should be -67 dBm.
BOne AP should be deployed per 3000 square feet.
CThe edge of the cell should be below 35 RSSI.
DThe measurement should be done on the 2.4-GHz band.

Explanation

Cisco's standard recommendation for VoWLAN deployments is that the edge of each AP's cell should measure at least -67 dBm. This ensures that as a client roams toward the boundary of one AP's coverage area, it still maintains a strong enough signal to support the quality of service requirements of voice traffic (low latency, low jitter, low packet loss). Cells must overlap enough so that a roaming client always has at least one AP providing -67 dBm or better. Measuring only on 2.4 GHz ignores 5 GHz deployments. The 'one AP per 3000 square feet' rule is a rough data coverage guideline, not specific to voice. RSSI below 35 (without units or context) is not a standard Cisco voice design metric - -67 dBm is the recognized threshold.

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