CWNP CWISA-102 Certified Wireless IoT Solutions Administrator Exam Practice Test

• 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:

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.

• SINR vs. SNR:
• 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

• Wireless Transceiver: A transceiver is a combination of a transmitter and receiver used for wireless communication.
• Radio: The radio is the primary component responsible for:

References

• Transceiver: https://en.wikipedia.org/wiki/Transceiver

• XAML and .NET: XAML (eXtensible Application Markup Language) is primarily used within the .NET framework for defining user interfaces. Specifically, technologies like:
• XAML in Other Frameworks: While some limited adaptation exists, its core use is tightly coupled with .NET technologies.

References:

• XAML Overview (Microsoft Docs): Introductions to XAML emphasizing its use in .NET applications.
• WPF Documentation: Tutorials and references specifically mentioning XAML's role in Windows desktop development.

• LoRa Modulation: LoRa (Long Range) is a proprietary wireless technology that utilizes Chirp Spread Spectrum (CSS) modulation.
• CSS Characteristics:

References

• LoRa: https://en.wikipedia.org/wiki/LoRa
• Chirp Spread Spectrum (CSS): https://en.wikipedia.org/wiki/Chirp_spread_spectrum

• Purpose of POC: A proof-of-concept (POC) validates the feasibility and potential value of a solution within its intended operational environment.
• Scaling: POCs are small-scale, allowing for quicker and less costly testing before committing to a full-scale deployment.
• Real-world Evaluation: Unlike manufacturer demos, a POC exposes the system to the unique variables (e.g., interference, usage patterns) present in the user's specific setting.

References:

• IT project management: Materials discussing the role of proof-of-concept phases and their goals.

• Smart City Focus: Smart city initiatives mainly address infrastructure, environmental monitoring, and optimization of public services.
• Ride-sharing Context: While self-driving technology could contribute to future smart city transportation, it's primarily a private-sector innovation, not a core municipal service like the other options.
• Typical Smart City Applications:

References:

• Smart City Examples: Case studies showcasing common application areas (infrastructure, environment, utilities).
• Autonomous Vehicles and Smart Cities: Discussions of the potential interplay but emphasize the still-developing nature of self-driving tech.

• KPI alignment: Key Performance Indicators (KPIs) define success metrics for the wireless IoT solution (e.g., uptime, device responsiveness, data accuracy). Continuous monitoring tracks performance against these KPIs.
• Meeting Business Needs: Monitoring ensures the solution delivers the intended value. Are response times fast enough? Are business processes supported effectively?
• Proactive maintenance: Monitoring can reveal performance issues before they become critical failures, allowing for proactive fixes.
• Optimization: Monitoring data over time helps identify areas for fine-tuning the solution to further align with business requirements.

References

• Wireless IoT monitoring tools: Vendor documentation or articles on specific tools and the KPIs they can track.
• ITIL (Information Technology Infrastructure Library): Frameworks emphasizing monitoring and continuous improvement.

• PHP's Cross-Platform Nature: PHP originated for server-side web development, but also has a command-line interface (CLI) enabling its use for scripts and automation tasks.
• Other Options:

References:

• PHP (Introduction): Overviews mentioning its dual role in server-side web applications and as a general-purpose scripting language.
• PHP CLI: Documentation on the command-line interface for PHP.

• 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:

References

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

• 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:

References

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

• Privilege Creep Defined: Gradual accumulation of excessive permissions over time, often due to users changing roles or access needs not being adjusted accordingly.
• Other Terms:

References:

• Principle of Least Privilege: Security best practice emphasizing the need to minimize access to only what's necessary.
• Access Control Models: Discussions of how privilege creep can violate security principles.

• Successful Deployment Depends on Buy-In: A final customer meeting signifies the handover phase. Achieving stakeholder agreement ensures everyone impacted by the solution has a voice and feels their concerns are addressed.
• Sign-Off and Formal Acceptance: Stakeholders often need to formally "sign-off" on a project's completion, indicating satisfaction and readiness for operational use.
• Other Options: While Important, Not the Primary Goal:

References:

• Project Management Methodologies: Emphasis on stakeholder involvement & acceptance criteria.
• ITIL (Change Management): Materials on getting approval before a system goes live.

• LoRa: This refers to the underlying radio modulation technique using Chirp Spread Spectrum (CSS). It defines how data is physically encoded onto the wireless signal.
• LoRaWAN: This is the network protocol built on top of LoRa. It manages device communication, network topology, and aspects like security. It operates at the MAC sublayer of the Data Link layer (Layer 2) of the OSI model
• LoRa vs. LoRaWAN: Key takeaway is that LoRa is the physical layer technology, while LoRaWAN adds the networking layer for management.

References:

• LoRa Modulation: Technical explanations of Chirp Spread Spectrum (CSS).
• LoRaWAN Specification: Official documentation detailing the network architecture and MAC layer functions.
• OSI Model: Descriptions of the Data Link layer and its role in networking.

• Lab Purpose: Wireless testing labs offer controlled settings to:
• Other Benefits (While not the primary benefit):

References

• Benefits of IT Labs: Can be extended from wireless to broader IT experimentation and learning. (Articles on this topic are readily available)

• Browser Ubiquity: JavaScript has a native runtime environment within almost every modern web browser, making it the 'built-in' scripting language for web-based interfaces.
• Node-RED: This IoT flow-based programming tool specifically uses JavaScript for its logic and automation functions.
• Other Languages:

References:

• JavaScript (Browser Compatibility): Documentation of its near-universal support
• Node-RED (Programming Model): Descriptions of how it uses JavaScript for node logic.

• 60GHz Absorption: The 60GHz band experiences significant signal attenuation due to absorption by oxygen molecules in the atmosphere. This severely restricts the usable range of wireless systems operating in this frequency.
• Why Other Options Don't Apply:

References:

• 60GHz Propagation Characteristics: Technical papers discussing oxygen absorption and its influence on range limitations.
• Millimeter-wave (mmWave) Communication: Overviews highlighting the challenges and short-range applications of 60GHz systems.

• IP Ratings & Manufacturing: IP66 provides:
• Harsh Manufacturing Environments: IP66 is common due to dust, dirt, and potential exposure to liquids during cleaning or spills.

References

• IP Ratings: https://en.wikipedia.org/wiki/IP_Code

• Overlay vs. Integrated Monitoring:
• Overlay Advantage: Since the overlay system is separate, it doesn't add overhead or complexity to the core network, avoiding potential disruption of wireless services.

• Health IoT Device Categories:

References

• Health IoT: Resources on healthcare + IoT will illustrate device types.