無料CWISA-103試験ブレーン問題集認定ガイド問題と解答 [Q19-Q40]

無料CWISA-103試験ブレーン問題集認定ガイド問題と解答

CWISA-103認定概要最新のCWISA-103PDF問題集

質問 # 19
What best describes the area covered or connected by a WWAN?

A. In-building
B. Region
C. City
D. Campus

正解：B

解説：
* 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

質問 # 20
What is the primary difference between LoRa and LoRaWAN?

A. LoRa is the modulation method and LoRaWAN implements the higher network layers
B. LoRa Is used for communicating across the Internet and LoRaWAN is used only on the local link
C. LoRaWAN is the Physical Layer and LoRa is the Transport Layer
D. LoRa uses RF and LoRaWAN uses light-based communications

正解：A

解説：
* 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.

質問 # 21
When deploying devices in an indoor manufacturing environment, which IP rating is more likely to be required?

A. IP46
B. IP38
C. IP66
D. IP47

正解：C

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 # 22
What function does the IEEE perform in relation to wireless technologies?

A. Promotes technology and standards development
B. Brings wireless products to market
C. Designs wireless chipsets
D. Certified equipment to be compatible

正解：A

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 # 23
You must plan for encryption in a wireless solution deployment. What type of data should always be encrypted? (Choose the single best answer.)

A. Sensitive data in memory
B. Non-sensitive data at rest
C. Sensitive data in transmission
D. Non-sensitive data in archives

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 # 24
Which one of the following location tracking technologies is most energy efficient in typical implementations?

A. GPS
B. Wi-Fi
C. Cellular
D. BLE Beacons

正解：D

解説：
* BLE Beacon Power Efficiency: Bluetooth Low Energy (BLE) beacons are designed for low power consumption. Their primary function is to periodically broadcast short data packets (advertising their presence).
* Other Technologies:
* Cellular: More power-hungry due to long-range communication and complex protocols.
* GPS: Power intensive, especially when actively tracking location.
* Wi-Fi:

質問 # 25
Which one of the following is NOT a typical Smart City application?

A. Demand-based road tolling
B. Self-driving ride sharing
C. Pollution monitoring
D. City-wide municipal Wi-Fi

正解：B

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 # 26
Among these choices, what is the most common reason administrators use scripting during the deployment of a wireless solution?

A. To provide time for playing solitaire
B. To increase the signal strength of the resulting wireless links
C. To enhance the capabilities of the resulting solution
D. To reduce configuration errors

正解：D

解説：
* Automation for Consistency: Scripts eliminate the potential for human error during repetitive configuration tasks on multiple devices. This ensures uniformity across the wireless solution.
* Speed and Efficiency: Scripts can be much faster than manual configuration, particularly in large deployments.
* Other Benefits: While scripts might aid signal strength (e.g., optimizing settings) or enhance solution capabilities, their core value in configuration is reducing errors.
References:
Network Automation: Benefits of using scripts for configuration management.
Configuration Management Best Practices: Emphasize the importance of consistency and repeatability.

質問 # 27
You have been asked to locate an intermittent RF interference source. What tool will assist best in locating the generating device?

A. WinPCAP
B. Spectrum analyzer
C. NMAP
D. Protocol analyzer

正解：B

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 # 28
What user authentication method is commonly used in guest Wi-Fi networks in the hospitality industry?

A. Kerberos
B. NTLM
C. Captive portal
D. SIM cards

正解：C

解説：
* Captive Portals for Guest Access: These are web pages that intercept users' requests before granting full internet access. They often require agreeing to terms, entering basic information, or viewing ads.
* Hospitality Fit: Captive portals are simple to deploy, require minimal user setup, and provide control for the hospitality provider (e.g., usage limits).
* Why Other Options Are Less Common:
* NTLM: Microsoft authentication, mainly for corporate networks, too complex for casual guest use.
* Kerberos: Complex authentication for enterprise, overkill for guest Wi-Fi
* SIM Cards: Used in cellular devices, not for general Wi-Fi access.
References:
Captive Portals: Explanations of how they work and their use cases.
Guest Wi-Fi in Hospitality: Best practices highlight the prevalence of captive portals in this industry.

質問 # 29
What consideration is found in PtMP systems that is not found in PtP systems?

A. SINR optimization
B. Frequency selection
C. Airtime management
D. Interference avoidance

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 # 30
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 rarely support features required for small business deployment
B. They often operate only in the 2.4 GHz frequency band used by 802.11 devices
C. They typically only support FHSS modulation schemes
D. They usually stop working after twelve months

正解：B

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 # 31
What is the primary difference between LoRa and LoRaWAN

A. LoRa is the modulation method (using CSS modulation at the Physical Layer) and LoRaWAN is the MAC sub-layer of the Data Link layer
B. LoRa is the Physical Layer and LoRaWAN is the Transport Layer
C. LoRa uses RF and LoRaWAN uses light-based communications
D. LoRa is used for communicating across the Internet and LoRaWAN is used only on the local link

正解：A

解説：
* 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.

質問 # 32
You are creating documentation for a new wireless solution that is deployed in the organization. Why is it important to document APIs in use within the system?

A. If APIs are in use, it typically indicates the use of custom scripts or application code. Future support will be easier when the APIs in use are documented.
B. It allows future support to implement APIs that have not been used at the time of deployment.
C. The APIs in use will not function without this documentation. The documentation is linked to the executable process of the APIs.
D. If APIs are in use, it typically indicates that the vendor has not provided ideal support. Without documentation, you cannot prove this reality for a discount.

正解：A

解説：
* Customization and Integrations: The presence of APIs often suggests a system is integrated with other platforms or has custom-built elements.
* Understanding Dependencies: Documenting used APIs helps clarify how different parts of the system interact and where potential issues might arise.
* Troubleshooting Efficiency: Detailed API documentation aids in resolving problems, allowing staff to assess interconnected systems effectively.
* Knowledge transfer: Future support teams won't have to reverse-engineer the system; documentation ensures smooth handover and understanding.
References:
Best practices API documentation: Guides on API documentation formats and the level of detail needed for maintenance. [Example: Swagger, OpenAPI Specification] (https://swagger.io/) Software Development Life Cycle (SDLC): Materials emphasizing the importance of documentation during development and support phases.

質問 # 33
What provides the security (encryption) in an HTTPS connection?

A. IPSec
B. SSL/TLS
C. SSH
D. SNMPv3

正解：B

解説：
* SSL/TLS Secures Web Traffic: HTTPS builds upon HTTP, adding the encryption provided by Secure Sockets Layer (SSL) or its successor, Transport Layer Security (TLS).
* Other Protocols Have Different Purposes:
* IPSec: Secures IP traffic at a network level, can be used alongside TLS.
* SNMPv3: Management protocol, offers security features, but not the primary mechanism in HTTPS.
* SSH: Secure remote shell, unrelated to web data encryption.
References:
TLS (and SSL): Explanations of their role in HTTPS and how they provide encryption for web communication.
HTTPS Overview: Materials showing how TLS fits into the overall HTTPS architecture.

質問 # 34
You are performing an implementation for a cloud-based wireless solution. How is connectivity to the cloud established? (Choose the single best answer.)

A. Through the use of IPX/SPX routers
B. Through cellular Internet connections only
C. Through BLE Layer 2 connections that do not use IP
D. Through any Layer 3 network connected to the Internet

正解：D

解説：
* Cloud Connectivity Relies on IP: Most cloud-based services operate via the internet, which utilizes Internet Protocol (IP) at Layer 3 of the network model.
* Flexibility: Various Layer 2 technologies (Ethernet, Wi-Fi) can connect to a Layer 3 network that ultimately provides Internet access
* BLE Exception: Bluetooth Low Energy can have cloud connectivity, but often through gateways and not as a direct Layer 2 connection.
* Eliminating Incorrect Options: IPX/SPX is an outdated protocol, and cellular is only one possible way to achieve Internet access.
References:
OSI Model: Descriptions of Network Layers, especially Layer 2 (Data Link) and Layer 3 (Network).
Cloud Architecture: Diagrams showing how devices commonly access cloud resources through internet- based infrastructures.

質問 # 35
How is ASK modulation different from FSK modulation?

A. ASK does not work at high frequencies
B. FSK is more sensitive to noise than ASK
C. ASK varies the amplitude of the signal while FSK shifts its frequency
D. ASK can carry more data than FSK

正解：C

解説：
* Key Modulation Differences:
* ASK (Amplitude Shift Keying): Digital data is represented by changes in the amplitude (strength) of a carrier wave.
* FSK (Frequency Shift Keying): Digital data is represented by changes in the frequency of a carrier wave.
References
* ASK: https://en.wikipedia.org/wiki/Amplitude-shift_keying
* FSK: https://en.wikipedia.org/wiki/Frequency-shift_keying

質問 # 36
How does OFDMA differ from OFDM?

A. OFDMA offers greater range by using multiple channels at once
B. OFDMA uses multiple radios to achieve higher throughput
C. OFDMA allows multiple devices to transmit simultaneously on the same frequency
D. Subcarriers of OFDMA can contain data destined for a different receiver

正解：C

解説：
* OFDM vs. OFDMA:
* OFDM (Orthogonal Frequency-Division Multiplexing): Divides a channel into multiple subcarriers for data transmission.
* OFDMA (Orthogonal Frequency-Division Multiple Access): Extends OFDM by allowing multiple users to share subcarriers simultaneously, improving efficiency and spectral utilization.
References
* OFDM: https://en.wikipedia.org/wiki/Orthogonal_frequency-division_multiplexing
* OFDMA: https://en.wikipedia.org/wiki/Orthogonal_frequency-division_multiple_access

質問 # 37
A Wi-Fi enabled weight scale is an example of what kind of health IoT device?

A. wearable
B. non-wearable
C. injectable
D. implantable

正解：B

解説：
* 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.

質問 # 38
What software is typically stored in ROM and is used to initialize a device?

A. Firmware
B. Application
C. Container
D. Service

正解：A

解説：
* Firmware Definition: Firmware is a type of software embedded in hardware devices. It provides low- level instructions that control the basic operations and initialization of the device.
* ROM Storage: Firmware is typically stored in Read-Only Memory (ROM) or other forms of non- volatile memory, meaning it persists even when the device is powered off.
* Functions:
* Booting: Initiates the hardware and loads the operating system.
* Hardware Control: Provides an interface between the hardware and the operating system.
* BIOS: The firmware on PCs is often referred to as BIOS (Basic Input/Output System).
References
* Firmware Explanation: https://en.wikipedia.org/wiki/Firmware
* ROM: https://en.wikipedia.org/wiki/Read-only_memory

質問 # 39
Which one of the following items has driven large serving 5- to 18-year-old students?

A. Online torrent sites
B. Streaming music
C. Wearable body sensors
D. Cloud-based applications

正解：D

解説：
* 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.
* [Example: Project Tomorrow Speak Up Research Project on Digital Learning] (https://tomorrow.
org/speakup/)
* Network usage studies in schools: Research on bandwidth usage patterns can confirm the primary drivers of traffic in educational settings.

質問 # 40
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CWNP CWISA-103 認定試験の出題範囲：

トピック	出題範囲
トピック 1	Wireless Technologies: This section of the exam measures the skills of Wireless Architects and covers foundational knowledge of wireless IoT technologies and their applications. It includes maintaining awareness of emerging technologies through research, understanding common applications and their associated frequencies and protocols, and familiarity with key standards organizations like IEEE, IETF, and Wi-Fi Alliance. The domain also encompasses defining various wireless network types including WLAN, WPAN, and IoT implementations across industries, along with understanding the hardware and software components of IoT devices and gateways, covering processors, memory, radios, sensors, and operating systems.
トピック 2	Supporting Wireless Solutions: This section of the exam measures the skills of Wireless Support Engineers and focuses on the ongoing administration and support of wireless solutions across various vertical markets. It involves administering solutions in healthcare, industrial, smart cities, retail, and other environments while troubleshooting common problems including interference, configuration issues, and hardware malfunctions. The domain includes determining the best use of scripting and programming solutions for IoT implementations, understanding data structures and APIs, and comprehending networking and security protocols. It also covers understanding application architectures and their impact on wireless solutions, including single-tier and multi-tier architectures, database systems, and application servers.
トピック 3	Radio Frequency Communications: This section of the exam measures the skills of RF Engineers and focuses on the fundamental principles of radio frequency communications. It involves explaining RF wave characteristics such as frequency, wavelength, and amplitude, and understanding behaviors like amplification, attenuation, and free space path loss. The domain covers describing modulation techniques including ASK, FSK, PSK, and QAM, and explaining the capabilities of RF components like radios, antennas, and cabling. It also includes describing the use and capabilities of different RF bands in terms of communication ranges and power levels.
トピック 4	Planning Wireless Solutions: This section of the exam measures the skills of IoT Solutions Architects and encompasses the planning phase of wireless IoT solutions. It involves identifying system requirements, including use cases, capacity needs, security requirements, and integration needs, while considering constraints such as budgetary, technical, and regulatory limitations. The domain includes selecting appropriate wireless solutions based on requirements, planning for technical needs, including LAN WAN networking and frequency coordination, and understanding the capabilities of common wireless IoT solutions like Bluetooth, Zigbee, and LoRaWAN, along with location services and methods.
トピック 5	Implementing Wireless Solutions: This section of the exam measures the skills of Wireless Implementation Specialists and covers the practical implementation of wireless IoT solutions. It involves understanding key issues related to automation, integration, monitoring, and management, and using best practices in implementation,n including pilot testing, configuration, installation, and documentation. The domain includes validating implementations through testing and troubleshooting, performing installation procedures including equipment mounting and connectivity configuration, and implementing security solutions covering authentication, authorization, and encryption. It also encompasses knowledge transfer practice,s including staff training and solution documentation.