CWISA-102 Exam Dumps - CWNP Certification Questions and Answers

• Perception Layer: The foundation of an IoT system, it consists of sensors and actuators that:

• 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.

• HTTP's Popularity: HTTP is the foundation of the web, making it widely known and supported. Developers have extensive familiarity with its concepts (methods, headers, status codes, etc.).
• REST APIs and Webhooks: These often leverage HTTP for communication, building upon existing knowledge and tools.
• Tradeoffs:

References:

• REST APIs: Overviews of their use of HTTP, demonstrating its prevalence in API development.
• Developer Experience with HTTP: Discussions on the familiarity with and availability of HTTP libraries in various programming languages

• 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.

• 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.

References

• IEEE 802.15.4 Standard: https://standards.ieee.org/standard/802_15_4-2020.html
• IEEE Website: https://www.ieee.org/

• 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.

• Ongoing Monitoring for Adaptability: Wireless networks are dynamic environments. Ongoing monitoring is essential because:

References

• Importance of Wireless Network Monitoring: Resources will detail its role in proactive management

• Capacity Planning: The number of devices a wireless network can support is the primary determinant of its required capacity. This is because:

• OFDM vs. OFDMA:

References

• OFDM: https://en.wikipedia.org/wiki/Orthogonal_frequency-division_multiplexing
• OFDMA: https://en.wikipedia.org/wiki/Orthogonal_frequency-division_multiple_access

• SBCs (Single Board Computers): Designed as standalone, small-form-factor computers. They often include:
• Controller Boards: Focus on controlling specific hardware or systems.

References

• SBC Examples: https://www.raspberrypi.org/, https://www.beagleboard.org/
• Controller Board Examples: https://www.arduino.cc/