CWNP CWISA-102 Exam Dumps

Mesh Connectivity Depends on Signal:Mesh nodes relay data for each other. Weak signal strength between nodes can disrupt connectivity throughout the network.

Troubleshooting Signal Issues:Physically relocating affected nodes can improve their ability to form stable connections with other nodes in the mesh.

Why Other Options May Not Help:

Separate Mesh: Splits the network, not solving the root connectivity issue

Output Power: May help marginally, but significant improvement is typically achieved through repositioning.

Security Settings: Unlikely to cause connectivity issues between properly configured nodes in the same mesh.

References:

Wireless Mesh Network Troubleshooting:Guides addressing signal strength and coverage concerns.

RF Site Survey Tools:Resources on software that can help visualize signal strength and aid in node placement.

Cloud Connectivity Relies on IP:Most cloud-based services operate via the internet, which utilizes Internet Protocol (IP) at Layer 3 of the network model.

Flexibility:Various Layer 2 technologies (Ethernet, Wi-Fi) can connect to a Layer 3 network that ultimately provides Internet access

BLE Exception:Bluetooth Low Energycanhave cloud connectivity, but often through gateways and not as a direct Layer 2 connection.

Eliminating Incorrect Options:IPX/SPX is an outdated protocol, and cellular is only one possible way to achieve Internet access.

References:

OSI Model:Descriptions of Network Layers, especially Layer 2 (Data Link) and Layer 3 (Network).

Cloud Architecture:Diagrams showing how devices commonly access cloud resources through internet-based infrastructures.

SINR vs. SNR:

SNR (Signal-to-Noise Ratio):Measures the power of the desired signal relative to background noise.

SINR (Signal-to-Interference-plus-Noise Ratio):Considers both background noiseandinterference from other signals operating on the same frequency.

Practical Importance:SINR is a more realistic indicator of real-world signal quality in wireless environments where interference is a significant factor.

References

SINR:https://en.wikipedia.org/wiki/Signal-to-interference-plus-noise_ratio

SNR:https://en.wikipedia.org/wiki/Signal-to-noise_ratio

Decibel (dB):A logarithmic unit expressing ratios of power or signal strength. It's used in RF contexts due to the wide range of signal levels encountered.

Examples:

dBm:Decibels relative to one milliwatt (power measurement).

dBi:Decibels relative to an isotropic antenna (antenna gain).

References

Decibel:https://en.wikipedia.org/wiki/Decibel

Attenuation:Describes the progressive loss of signal strength as it travels through a medium (like air, cables, walls). It's caused by factors like absorption, distance, and obstacles.

Other Phenomena:

Diffraction:Bending of waves around obstacles.

Reflection:Waves bouncing off surfaces.

**Scattering: ** Waves dispersing in multiple directions.

References

Attenuation:https://en.wikipedia.org/wiki/Attenuation