Difficulty: Hard

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A user's home mesh wireless network is experiencing latency issues. A technician has: Performed a speed test. Rebooted the devices. Performed a site survey. Performed a wireless packet capture. The technician reviews the following information: SSID Home MAC AAAAAA111112 RSSI -83dBm Channel 11 Home AAAAAA111113 -91dBm 11 Home AAAAAA111114 -70dBm 11 The technician notices in the packet capture that frames were retransmitted. Which of the following is the most likely cause of the user's network issue?

Which of the following is the most likely cause of the user's network issue?

Rationale

The network has too much overlap.

The reported RSSI values indicate varying signal strengths across the mesh network, with one node showing a significantly weaker signal. This overlap can lead to interference and increased latency, as devices may struggle to maintain stable connections, resulting in retransmissions that further degrade performance.

A (The SSIDs should not be the same.) YOUR ANSWER

Having the same SSID across a mesh network is standard practice, as it allows devices to connect seamlessly to the strongest node. This configuration is intentional to enhance user experience and does not inherently cause latency issues. Therefore, this choice does not address the root cause of the observed network problems.

B (The network has too much overlap.) CORRECT

The RSSI values indicate potential signal overlap issues among the nodes. The -91 dBm reading suggests that this node may be experiencing interference or weak connections, leading to retransmissions. Such overlap can cause network congestion and latency, making this the most likely cause of the user's network issues.

C (The devices are incompatible with the mesh network.) YOUR ANSWER

While incompatibility could theoretically lead to performance issues, the fact that the network is functioning with multiple nodes suggests that the devices are compatible. Any significant incompatibilities would likely result in complete failure of the network rather than just latency, making this choice unlikely.

D (The nodes are underpowered.) YOUR ANSWER

Underpowered nodes could contribute to network issues, but there is no indication in the provided data that the nodes lack sufficient power. The RSSI readings suggest that the nodes are operational but may be experiencing interference, rather than being underpowered.

Conclusion

The analysis of the mesh network's performance indicates that the most significant issue arises from overlapping signals, which leads to retransmissions and increased latency. By addressing the network's overlap, it may be possible to enhance connectivity and overall performance. The other options either misinterpret the network design or do not directly correlate with the latency issues observed.

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