Implementing Cisco Wireless Network Fundamentals (WIFUND, legacy) — Question 110

In the current RF environment, the noise floor is -95 dBm. A tablet needs an SNR of 25 dB to transmit at the required speed. What must the RSSI cell edge be to meet the required SNR?

Answer options

• A. -120 dBm
• B. -90 dBm
• C. -70 dBm
• D. -60 dBm
• E. -50 dBm

Correct answer: C

Explanation

To determine the required RSSI, you add the noise floor of -95 dBm to the SNR of 25 dB, resulting in -70 dBm. This means that option C, -70 dBm, is the correct answer. The other options provide RSSI levels that are either too low or too high to achieve the necessary SNR.