CWISA-102 Practice Exam Questions with Answers Certified Wireless IoT Solutions Administrator Certification

• Coexistence Priority: Frequency coordination is the most critical aspect in ensuring that multiple wireless solutions function without significant interference.
• Impact of Interference: Uncoordinated frequencies lead to:

• Outsourcing Knowledge Transfer: When outsourcing implementation, the service provider has firsthand knowledge of system setup and configuration. Clear documentation ensures this knowledge remains accessible to you after the project is complete.
• Ongoing Support: While paid/free support options influence long-term maintenance, they won't substitute missing documentation about the specific setup.
• Reducing Future Vendor Reliance: Detailed documentation helps mitigate over-reliance on the service provider for minor changes and troubleshooting, giving you more long-term autonomy.
• Proof of Concept: A POC typically happens before outsourcing, and focuses on validating the solution's feasibility, not ensuring smooth knowledge transfer thereafter.

References:

• Service Level Agreements (SLAs): Documentation related to outsourced work may be defined as a deliverable within an SLA.
• Knowledge Management Best Practices:

• 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.

• 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.

• 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 Energy can have 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.

• ZigBee Channel Spacing: ZigBee channels in the 2.4 GHz band are spaced 5 MHz apart. This helps manage interference in the crowded 2.4 GHz spectrum.

• SSL/TLS Secures Web Traffic: HTTPS builds upon HTTP, adding the encryption provided by Secure Sockets Layer (SSL) or its successor, Transport Layer Security (TLS).
• Other Protocols Have Different Purposes:

References:

• TLS (and SSL): Explanations of their role in HTTPS and how they provide encryption for web communication.
• HTTPS Overview: Materials showing how TLS fits into the overall HTTPS architecture.

• 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

• IETF's Focus: The Internet Engineering Task Force (IETF) primarily develops and standardizes internet protocols operating at the Network Layer (Layer 3) and above in the OSI model.
• Key Protocols: Some prominent IETF-developed protocols include:

References

• IETF Website: https://www.ietf.org/
• OSI Model: https://en.wikipedia.org/wiki/OSI_model

• Primary Concern: Safety: Building codes and safety regulations are there to prevent injury and accidents. This includes potential harm from improper equipment installation (falling objects, electrical hazards, etc.).
• Legal and Ethical Responsibility: Organizations have an obligation to provide a safe workplace for employees and protect the well-being of end-users.
• Insurance Considerations: While complying with codes may impact insurance rates, this shouldn't be the primary motivation, as safety itself is paramount.

References:

• Occupational Safety and Health (e.g., OSHA in the US): Websites of regulatory bodies outlining guidelines for safe equipment installation in various settings.
• Electrical Codes (e.g., National Electrical Code): Standards that address safe practices to prevent fire and shock hazards.

The concept described is Free Space Path Loss (FSPL). FSPL refers to the reduction in power density of an electromagnetic wave as it propagates through a clear, unobstructed path in free space. This weakening of the signal is due to the spreading of the wavefront as it travels, causing the power to be distributed over a larger area. The FSPL can be calculated using the Friis Transmission Equation, which shows that the received power decreases with the square of the distance from the transmitter. This concept is fundamental to understanding the behavior of RF signals in various communication systems, including wireless IoT, where the signal strength at the receiver is a critical factor for reliable data transmission.

References:The information provided aligns with the Friis Transmission Equation, which models how the power of an RF signal decreases with distance1. Additionally, the concept of FSPL is a well-known phenomenon in RF propagation, affecting the design and optimization of wireless communication systems

• Health IoT Device Categories:

References

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

• 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.

• Bottom-Up Troubleshooting: The OSI model provides a structured diagnostic approach. Starting at Layer 1 ensures basic physical connectivity issues are ruled out first.
• MQTT Relies on IP: MQTT operates at a higher layer of the OSI model, relying on TCP/IP (Layers 4 and 3) for communication. Problems at the physical layer will disrupt everything built upon it.
• Checking the Fundamentals: Before investigating complex application issues (MQTT), verify cables, link lights, Wi-Fi signal strength, etc.

References:

• OSI Model: Descriptions of the seven layers, emphasizing the foundation provided by Layer 1 (Physical).
• Network Troubleshooting Guides: Resources that outline common Layer 1 problems and their symptoms.

• IEEE's Role: The Institute of Electrical and Electronics Engineers (IEEE) is a global organization critical in developing and promoting technical standards across various fields, including wireless technologies.
• Standards Work: IEEE creates wireless technology standards like:

References

• IEEE: https://www.ieee.org/