When is the Poor Link SNR Alarm generated in a mesh network?
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A. B. C. D.C.
In a wireless mesh network, the Poor Link SNR alarm is generated when the signal-to-noise ratio (SNR) between mesh nodes falls below a certain threshold. This alarm indicates that the link between two mesh nodes is experiencing poor signal quality, which can lead to degraded network performance or even network failure.
Option A states that the Poor Link SNR Alarm is generated when the SNR between the mesh nodes falls below 15 dB. This could be a possible threshold for generating the alarm, but it is not a universally accepted value. In practice, the threshold may vary depending on factors such as the frequency band, channel width, modulation scheme, interference, and distance between nodes.
Option B states that the Poor Link SNR Alarm is generated when the SNR between the client and the AP falls below 20 dB. This is not correct as the Poor Link SNR Alarm is specific to mesh nodes and not client-AP links.
Option C states that the Poor Link SNR Alarm is generated when the SNR between the mesh nodes falls below 12 dB. This could be a possible threshold for generating the alarm, but as mentioned earlier, the threshold may vary depending on several factors.
Option D states that the Poor Link SNR Alarm is generated when the Cisco WCS (Wireless Control System) receives the first 10 SNR links from the network. This is not correct as the Poor Link SNR Alarm is generated based on the SNR threshold between mesh nodes and not on the number of SNR links received by the WCS.
In summary, option A and C are both possible thresholds for generating the Poor Link SNR Alarm in a mesh network, but there is no definitive answer as it depends on various factors. Option B and D are not correct.