You are considering the implementation of a lab for testing wireless equipment. What is the primary benefit of such a lab? (Choose the single best answer.)
Answer : D
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)
Question 3
What organization maintains and publishes the 802.15.4 Standard?
Answer : B
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.
What metric is used to express a relative increase or decrease in signal strength?
Answer : C
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:
dBm:Decibels relative to one milliwatt (power measurement).
dBi:Decibels relative to an isotropic antenna (antenna gain).
In the simplified three-layer model for wireless IoT, what is the universal primary function of the Perception layer?
Answer : A
Perception Layer:The foundation of an IoT system, it consists of sensors and actuators that:
Sense:Collect data about the environment or object being monitored.
Actuate:Potentially make changes based on commands (e.g., a smart valve opening/closing).
Transmit:Send gathered data to upper layers for processing.
Question 6
Which one of the following items has driven large serving 5- to 18-year-old students?
Answer : A
Cloud-based applications drive bandwidth usage:Applications like Google Suite, Microsoft 365, and video conferencing (Zoom, Teams) are commonly used in educational settings. These rely on cloud servers, requiring significant downloads and uploads.
Shift towards online learning:More schools are utilizing online learning platforms and resources, further increasing their dependence on cloud-based solutions.
Streaming, torrents, wearables less impactful:Streaming music and torrent sites can contribute, but their impact is generally less significant. Wearables in education are still niche despite their potential.
References
Trends in education technology:Reports on the rise of cloud-based learning platforms in schools.
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