Pass the CWNP CWSA (Solutions Administrator) CWISA-103 Questions and answers with ValidTests

Health IoT Device Categories:

Wearable: Devices worn on the body (smartwatches, fitness trackers).

Non-wearable: Devices used without being worn (smart scales, connected medical equipment).

Implantable: Surgically inserted devices (pacemakers, glucose monitors).

References

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

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:

Security: HTTP itself is not inherently secure; HTTPS or additional layers address this.

Speed: Protocols optimized for IoT may have lower overhead, but HTTP's simplicity often outweighs minor performance differences.

Lab Purpose: Wireless testing labs offer controlled settings to:

Skill Development: Hone practical understanding of wireless technologies without impacting production environments.

Experimentation: Safely test different configurations, compatibility, and potential issues.

Troubleshooting: Isolate problems, test solutions, and understand how equipment behaves in various scenarios.

Other Benefits (While not the primary benefit):

Learning Environment: Ideal for structured training and exploration.

Evaluation: Compare hardware performance before deployment.

References

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

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.

WWAN (Wide-Area Wireless Network): WWANs provide connectivity over extensive geographic areas, typically covering regions or even entire countries.

Cellular Technology: WWANs often rely on cellular networks (3G, 4G, 5G) offered by mobile carriers.

References

WWAN: https://en.wikipedia.org/wiki/Wireless_wide_area_network

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:

Some languages are OS-specific (but less frequent with modern scripting languages) .

Many languages work in web or command line, not both like PHP.

IP Ratings & Manufacturing: IP66 provides:

Dust-tight: (First '6') Complete protection against dust ingress.

Powerful Water Jets: (Second '6') Protection against strong water jets from any direction.

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

LoRa: Refers to the physical layer chirp spread spectrum (CSS) modulation, enabling long-range, low-power communication.

LoRaWAN: An open MAC layer protocol that builds on LoRa, defining network architecture, device management, and data routing for large-scale LoRa networks.

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:

Scope definition typically happens much earlier

Solutions may or may not include wearables

Power supply should already be planned

Wi-Fi and Zigbee Interference: Both can operate in the 2.4 GHz band, leading to potential interference that degrades performance for both networks.

5 GHz Advantages:

Less crowded: Fewer devices operate in the 5 GHz band, reducing interference potential.

Wider Channels: 5 GHz supports wider channels, enabling higher data throughput for Wi-Fi.