CWISA-103問題集69問でCWNP CWSAを確実実践
リアル最新CWISA-103試験問題CWISA-103問題集
CWNP CWISA-103 認定試験の出題範囲：
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質問 # 30
What organization maintains and publishes the 802.15.4 Standard?
- A. IEEE
- B. Zigbee Alliance
- C. IETF
- D. Bluetooth SIG
正解：A
解説：
* 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/
質問 # 31
What function does the IEEE perform in relation to wireless technologies?
- A. Brings wireless products to market
- B. Designs wireless chipsets
- C. Promotes technology and standards development
- D. Certified equipment to be compatible
正解：C
解説：
* 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:
* IEEE 802.11: Wi-Fi standards
* IEEE 802.15.4: Basis for ZigBee, Thread, and other low-power networks References
* IEEE: https://www.ieee.org/
質問 # 32
Which one of the following is NOT a typical Smart City application?
- A. Demand-based road tolling
- B. City-wide municipal Wi-Fi
- C. Self-driving ride sharing
- D. Pollution monitoring
正解：C
解説：
* 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:
* Wi-Fi: Provides public internet access, enabling data collection
* Pollution Monitoring: Tracks air/water quality for environmental management.
* Demand-based Tolling: Adjusts pricing for traffic management.
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.
質問 # 33
What scripting language works natively inside of nearly all modern Web browsers and may also be used for automation within some wireless solutions, such as Node-RED?
- A. PHP
- B. Python
- C. R
- D. JavaScript
正解：D
解説：
* 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:
* PHP: Primarily server-side for web applications
* Python: Versatile language, used in some back-end IoT functions but not natively in browsers
* R: Statistical and data analysis, not typically embedded in wireless solutions References:
JavaScript (Browser Compatibility): Documentation of its near-universal support Node-RED (Programming Model): Descriptions of how it uses JavaScript for node logic.
質問 # 34
You have been asked to locate an intermittent RF interference source. What tool will assist best in locating the generating device?
- A. NMAP
- B. Protocol analyzer
- C. WinPCAP
- D. Spectrum analyzer
正解：D
解説：
* isualizing RF Interference: Spectrum analyzers display radio frequencies across a range, showing signal strength and potential interference sources. This is crucial for identifying non-Wi-Fi devices that might be disrupting your wireless solution.
* Other Tools Have Limitations:
* NMAP: Network mapper, focused on discovering devices, not RF analysis
* WinPCAP: Packet capture software, helpful but doesn't directly display the RF spectrum.
* Protocol Analyzer: Analyzes network traffic, but won't pinpoint physical layer interference.
References:
Spectrum Analyzers: How they work and common use cases in RF troubleshooting.
Wireless Interference Types: Resources that discuss non-Wi-Fi interference sources (microwaves, cordless phones, etc.)
質問 # 35
What is an advantage of an overlay monitoring system for wireless networks as opposed to an Integrated monitoring system?
- A. An overlay solution does not require power provisioning
- B. An overlay solution functions without disrupting services provided by the wireless network
- C. An overlay solution collects less data so that reporting is more efficient
- D. An overlay solution is less expensive than an integrated solution
正解：B
解説：
* Overlay vs. Integrated Monitoring:
* Overlay: A separate monitoring system independent of the primary wireless infrastructure.
* Integrated: Monitoring functions built into wireless access points or controllers.
* Overlay Advantage: Since the overlay system is separate, it doesn't add overhead or complexity to the core network, avoiding potential disruption of wireless services.
質問 # 36
You must ensure proper security controls are in place for a wireless solution. The solution allows for the use of groups to grant access to resources and capabilities. What is the term used to describe a situation where an individual is granted more access than required because of inclusion in a group?
- A. Improper delegation
- B. Privilege creep
- C. Improper grouping
- D. Privilege escalation
正解：B
解説：
* Privilege Creep Defined: Gradual accumulation of excessive permissions over time, often due to users changing roles or access needs not being adjusted accordingly.
* Other Terms:
* Privilege Escalation: A malicious act of obtaining higher-than-authorized access.
* Improper Delegation/Grouping: Faulty permission assignment, but not the gradual accretion aspect.
References:
Principle of Least Privilege: Security best practice emphasizing the need to minimize access to only what's necessary.
Access Control Models: Discussions of how privilege creep can violate security principles.
質問 # 37
What is an important feature of the PHP scripting language?
- A. It only works from the command line
- B. It works in web applications and at the command line
- C. It only works on Linux systems
- D. It only works embedded in web applications
正解：B
解説：
* 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.
References:
PHP (Introduction): Overviews mentioning its dual role in server-side web applications and as a general- purpose scripting language.
PHP CLI: Documentation on the command-line interface for PHP.
質問 # 38
What primary component is required to implement a wireless transceiver in a device?
- A. GPIO pins
- B. SRAM
- C. Radio
- D. Flash memory
正解：C
解説：
* Wireless Transceiver: A transceiver is a combination of a transmitter and receiver used for wireless communication.
* Radio: The radio is the primary component responsible for:
* Modulation: Encoding data onto a carrier wave.
* Demodulation: Extracting data from a received signal.
* Transmission/Reception: Handling the actual sending and receiving of modulated signals over the air.
References
* Transceiver: https://en.wikipedia.org/wiki/Transceiver
質問 # 39
What is defined as the weakening of signal amplitude as the signal passes through a medium?
- A. Diffraction
- B. Scattering
- C. Attenuation
- D. Reflection
正解：C
解説：
* Attenuation: Describes the progressive loss of signal strength as it travels through a medium (like air, cables, walls). It's caused by factors like absorption, distance, and obstacles.
* Other Phenomena:
* Diffraction: Bending of waves around obstacles.
* Reflection: Waves bouncing off surfaces.
* **Scattering: ** Waves dispersing in multiple directions.
References
* Attenuation: https://en.wikipedia.org/wiki/Attenuation
質問 # 40
What is a valid reason to continue using older wireless networking technologies?
- A. The desire to use older encryption processes, which are faster regardless of the CPU implemented
- B. The desire for faster communications
- C. A requirement to support legacy devices
- D. The desire to support internal antennas
正解：C
解説：
* Legacy Support: The primary reason to continue using older wireless technologies is the need to connect with devices that don't support newer standards (e.g., old sensors or equipment).
* Other Reasons (Not as Strong):
* Cost: Replacing legacy devices can be expensive.
* Reliability: Some legacy technologies might be well-proven in specific settings.
質問 # 41
When deploying devices in an indoor manufacturing environment, which IP rating is more likely to be required?
- A. IP66
- B. IP38
- C. IP46
- D. IP47
正解：A
解説：
* 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
質問 # 42
What is an important acceptance agreement to achieve in the final customer meeting for a wireless IoT deployment?
- A. Stakeholder acceptance
- B. Power supply provisioning
- C. Support for wearable IoT solutions
- D. Scope definition
正解：A
解説：
* 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
References:
Project Management Methodologies: Emphasis on stakeholder involvement & acceptance criteria.
ITIL (Change Management): Materials on getting approval before a system goes live.
質問 # 43
What factor severely limits the range of systems operating in the 60GHz band?
- A. Solar Radiation
- B. Rain Fade
- C. Atmospheric Scattering
- D. Oxygen Fade
正解：D
解説：
* 60GHz Absorption: The 60GHz band experiences significant signal attenuation due to absorption by oxygen molecules in the atmosphere. This severely restricts the usable range of wireless systems operating in this frequency.
* Why Other Options Don't Apply:
* Atmospheric Scattering: Impacts longer wavelength transmissions, less significant at 60GHz.
* Solar Radiation: Can cause interference on some frequencies, but not a primary range limitation at 60GHz.
* Rain Fade: Primarily affects higher frequencies (above 10GHz), but its impact is less severe than oxygen absorption at 60GHz.
References:
60GHz Propagation Characteristics: Technical papers discussing oxygen absorption and its influence on range limitations.
Millimeter-wave (mmWave) Communication: Overviews highlighting the challenges and short-range applications of 60GHz systems.
質問 # 44
What consideration is found in PtMP systems that is not found in PtP systems?
- A. Interference avoidance
- B. Frequency selection
- C. Airtime management
- D. SINR optimization
正解：C
解説：
* PtMP (Point-to-Multipoint): A single access point (AP) communicates with multiple client devices.
This means the AP needs to manage how the available airtime is shared among those clients.
* Airtime Fairness: Mechanisms are needed to ensure that:
* Each client gets a fair chance to communicate
* High-priority traffic isn't starved by low-priority traffic
* PtP (Point-to-Point): A dedicated link only has two devices, eliminating the need for complex airtime management.
* Considerations in Both: While interference, SINR, and frequency selection are important in both PtMP and PtP systems, the need for airtime management is unique to the multipoint scenario.
References:
Wireless Network Topologies (PtP vs. PtMP): Explanations of the differences in how communication is managed in each scenario.
TDMA (Time Division Multiple Access): A common airtime sharing method used in PtMP systems.
質問 # 45
What advantage is provided by using an NTP server within a wireless solution architecture?
- A. It provides for name resolution for older network devices
- B. It ensures uniform, synchronized time among devices
- C. It provides for semi-automatic IP addressing in wireless sensor networks
- D. It ensures security through AES encryption
正解：B
解説：
* Importance of Time Sync in IoT: Coordinated actions, accurate data analysis, and event logging in wireless IoT solutions often rely on devices having a shared time reference.
* NTP's Role: Network Time Protocol (NTP) enables devices to synchronize their clocks against a reliable time source (NTP server), ensuring consistency across the network.
* Why Other Options Don't Fit:
* IP Addressing: Usually handled by DHCP, not NTP.
* Encryption: SSL/TLS secure data in transit, not related to timekeeping.
* Name Resolution: Purpose of DNS, not NTP.
References:
Network Time Protocol (NTP): How it works and its importance in distributed systems.
IoT Time Synchronization Challenges: Articles highlighting the need for accuracy in sensor networks and similar use cases.
質問 # 46
What metric is used to express a relative increase or decrease in signal strength?
- A. dB
- B. W
- C. dBm
- D. mW
正解：A
解説：
* 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).
References
* Decibel: https://en.wikipedia.org/wiki/Decibel
質問 # 47
You must plan for encryption in a wireless solution deployment. What type of data should always be encrypted? (Choose the single best answer.)
- A. Non-sensitive data in archives
- B. Non-sensitive data at rest
- C. Sensitive data in transmission
- D. Sensitive data in memory
正解：C
解説：
* Most Vulnerable In Transit: Sensitive data (passwords, health information, etc.) is most susceptible to interception while being sent over a wireless network. Encryption is crucial at this stage.
* Encryption at Rest and in Memory: While also important, these are often handled with different cryptographic techniques depending on the system.
References:
Wireless Security Protocols: Details on encryption standards like WPA2/WPA3, TLS that focus on protecting data during transmission.
質問 # 48
You are implementing a smart office wireless solution for a small business. The business owner indicates that It is acceptable to use consumer-targeted wireless devices. What is a common negative attribute of consumer- targeted smart home or smart office devices?
- A. They often operate only in the 2.4 GHz frequency band used by 802.11 devices
- B. They typically only support FHSS modulation schemes
- C. They usually stop working after twelve months
- D. They rarely support features required for small business deployment
正解：A
解説：
* Consumer Smart Devices Limitation: Many consumer-oriented smart devices are designed for simplicity and cost-effectiveness, leading to reliance on the crowded 2.4 GHz band.
* Consequences:
* High Interference: Increased potential for interference from Wi-Fi and other 2.4 GHz devices.
* Limited scalability: Performance and reliability may degrade in busy wireless environments.
質問 # 49
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