CWISA-103 Exam Questions & Answers
Certified Wireless IoT Solutions Administrator (2025 Edition) • CWNP
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Sample CWISA-103 Questions
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What is the benefit of using SINR as opposed to SNR to reference signal quality at a receiver?
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.
Reference
SINR:https://en.wikipedia.org/wiki/Signal-to-interference-plus-noise_ratio
Key performance indicators and business requirements are most relevant to what operational activity for an existing wireless IoT solution?
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.
Reference
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.
What organization maintains and publishes the 802.15.4 Standard?
IEEE 802.15.4:The IEEE 802.15.4 standard is a fundamental specification for low-rate wireless personal area networks (LR-WPANs). It serves as the basis for many wireless IoT protocols.
IEEE's Role:The Institute of Electrical and Electronics Engineers (IEEE) is the organization responsible for creating, maintaining, and publishing the 802.15.4 standard.
Reference
IEEE 802.15.4 Standard:https://standards.ieee.org/standard/802_15_4-2020.html
What part(s) of the OSI network model does the IETF primarily focus on for the development of standards?
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:
IP (Internet Protocol):Foundation of internet addressing and routing.
TCP (Transmission Control Protocol):Reliable, connection-oriented data transport.
UDP (User Datagram Protocol):Connectionless, best-effort data transport.
DNS (Domain Name System):Translates domain names into IP addresses.
HTTP (Hypertext Transfer Protocol):Web communication.
Reference
As an RF signal propagates it becomes weaker at any given measurement point as it gets farther away from the transmitter. What concept is described?
Free Space Path Loss (FSPL):Describes how a radio signal weakens as it travels through open space, even without obstacles. It's caused by the signal spreading out, resulting in decreased power density at the receiver.
Calculation:FSPL depends on distance and frequency.
Reference
Free Space Path Loss:https://en.wikipedia.org/wiki/Free-space_path_loss
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