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NEW QUESTION # 14
You are planning to outsource the implementation of a new LoRaWAN w of the service provider performing the implementation in all cases?
- A. Effective documentation
- B. Ongoing paid support
- C. Proof of concept
- D. Ongoing free support
Answer: A
Explanation:
Outsourcing Knowledge Transfer: When outsourcing implementation, the service provider has firsthand knowledge of system setup and configuration. Clear documentation ensures this knowledge remains accessible to you after the project is complete.
Ongoing Support: While paid/free support options influence long-term maintenance, they won't substitute missing documentation about the specific setup.
Reducing Future Vendor Reliance: Detailed documentation helps mitigate over-reliance on the service provider for minor changes and troubleshooting, giving you more long-term autonomy.
Proof of Concept: A POC typically happens before outsourcing, and focuses on validating the solution's feasibility, not ensuring smooth knowledge transfer thereafter.
NEW QUESTION # 15
How is ASK modulation different from FSK modulation?
- A. ASK varies the amplitude of the signal while FSK shifts its frequency
- B. ASK can carry more data than FSK
- C. ASK does not work at high frequencies
- D. FSK is more sensitive to noise than ASK
Answer: A
Explanation:
* 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
NEW QUESTION # 16
What is the most important consideration when deciding whether to implement a wired or wireless solution?
- A. The applications being used
- B. The availability of PoE
- C. The distance between nodes
- D. Business and system requirements
Answer: D
Explanation:
* Requirements Drive Decisions: The decision between wired or wireless must align with the solution's overall purpose, performance targets, and operational constraints.
* Key Considerations:
* Reliability: Does the application require guaranteed connectivity? (Wired may be favored).
* Installation Cost: Can extensive cabling be done, or is it prohibitively expensive? (Wireless may be favored).
* Flexibility and Scalability: Is node placement likely to change in the future? (Wireless may be favored).
* Other Factors are Important, But Secondary: Distance, PoE availability, specific applications all matter, but they are assessed within the context of the overarching business needs.
References:
Wireless vs. Wired Network Design: Comparisons of pros and cons, highlighting how use cases guide the choice.
IoT Solution Planning: Materials on defining requirements before selecting technology.
NEW QUESTION # 17
What software is typically stored in ROM and is used to initialize a device?
- A. Firmware
- B. Service
- C. Application
- D. Container
Answer: A
Explanation:
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).
NEW QUESTION # 18
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
Answer: C
Explanation:
* 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.
NEW QUESTION # 19
What kind of PoE device can be used to power a non-PoE connected object assuming PoE power is provided on the Ethernet cable?
- A. PoE endspan switch
- B. PoE coupler
- C. PoE splitter
- D. PoE midspan injector
Answer: C
Explanation:
PoE Splitter: A PoE splitter separates power and data from a PoE-enabled Ethernet cable, allowing the powering of non-PoE devices.
NEW QUESTION # 20
What is the primary difference between LoRa and LoRaWAN
- A. LoRa is used for communicating across the Internet and LoRaWAN is used only on the local link
- B. LoRa is the modulation method (using CSS modulation at the Physical Layer) and LoRaWAN is the MAC sub-layer of the Data Link layer
- C. LoRa uses RF and LoRaWAN uses light-based communications
- D. LoRa is the Physical Layer and LoRaWAN is the Transport Layer
Answer: B
Explanation:
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.
NEW QUESTION # 21
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
Answer: A
Explanation:
* 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.
NEW QUESTION # 22
What is the most common difference between a single board computer (SBC) and a controller board?
- A. Controller boards have more powerful processors than most SBCs
- B. SBCs always have connectors for M2 devices and controller boards do not
- C. SBCs typically have connectors for display and input devices while controller boards do not
- D. Controller boards have I/O headers and SBCs do not
Answer: C
Explanation:
SBCs (Single Board Computers): Designed as standalone, small-form-factor computers. They often include:
Display Interfaces: HDMI, DisplayPort, etc.
Input Connections: USB for keyboards, mice, etc.
General Purpose Functionality: Can run a full operating system for wider applications.
Controller Boards: Focus on controlling specific hardware or systems.
Limited direct I/O: Limited connectors for displays/input devices.
Specialized tasks: Designed for embedded applications within larger systems.
NEW QUESTION # 23
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 grouping
- B. Privilege creep
- C. Improper delegation
- D. Privilege escalation
Answer: B
Explanation:
* 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.
NEW QUESTION # 24
Key performance indicators and business requirements are most relevant to what operational activity for an existing wireless IoT solution?
- A. Removal
- B. Upgrading
- C. Monitoring
- D. Implementation
Answer: C
Explanation:
KPI alignment: Key Performance Indicators (KPIs) define success metrics for the wireless IoT solution (e.g., uptime, device responsiveness, data accuracy). Continuous monitoring tracks performance against these KPIs.
Meeting Business Needs: Monitoring ensures the solution delivers the intended value.
Are response times fast enough? Are business processes supported effectively?
Proactive maintenance: Monitoring can reveal performance issues before they become critical failures, allowing for proactive fixes.
Optimization: Monitoring data over time helps identify areas for fine-tuning the solution to further align with business requirements.
NEW QUESTION # 25
What primary component is required to implement a wireless transceiver in a device?
- A. GPIO pins
- B. SRAM
- C. Flash memory
- D. Radio
Answer: D
Explanation:
* 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
NEW QUESTION # 26
What is defined as the weakening of signal amplitude as the signal passes through a medium?
- A. Reflection
- B. Diffraction
- C. Scattering
- D. Attenuation
Answer: D
Explanation:
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.
NEW QUESTION # 27
What process, used for security in wireless solutions, is defined as the encoding of information to prevent readability by unauthorized users?
- A. Encryption
- B. Authentication
- C. Authorization
- D. Access Control
Answer: A
Explanation:
* Encryption vs. Other Options:
* Access Control: Limits who can access data, but doesn't make it unreadable.
* Authentication: Validates user/device identity, but not focused on data confidentiality.
* Authorization: Determines the actions a user is allowed, separate from securing the data itself.
* How encryption works: Encryption uses algorithms and keys to turn plaintext into unreadable ciphertext. Only those with the correct key can decrypt it.
* Data in motion vs. data at rest: Encryption protects sensitive information both when transmitted over the wireless network and when stored on devices.
References:
Encryption standards and protocols: Resources on common wireless encryption types (WPA2, WPA3, TLS) and their implementation.
NEW QUESTION # 28
What is the spacing between ZigBee channels when operating in the 2.4 GHz frequency band?
- A. 2 MHz
- B. 1 MHz
- C. 25 MHz
- D. 5 MHz
Answer: D
Explanation:
* 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.
NEW QUESTION # 29
Among these choices, what is the most common reason administrators use scripting during the deployment of a wireless solution?
- A. To reduce configuration errors
- B. To increase the signal strength of the resulting wireless links
- C. To enhance the capabilities of the resulting solution
- D. To provide time for playing solitaire
Answer: A
Explanation:
* 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.
NEW QUESTION # 30
A BLE beacon is configured with a transmit power of +4 dBm. Which change will MOST increase its usable range?
- A. Decreasing advertising interval
- B. Lowering transmit power
- C. Increasing advertising interval
- D. Changing the BLE version
Answer: C
Explanation:
A larger advertising interval reduces RF congestion and packet collisions, which improves effective detection range. Decreasing interval increases traffic; lowering transmit power reduces range.
NEW QUESTION # 31
What is an important feature of the PHP scripting language?
- A. It only works embedded in web applications
- B. It works in web applications and at the command line
- C. It only works on Linux systems
- D. It only works from the command line
Answer: B
Explanation:
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.
NEW QUESTION # 32
What function does the IEEE perform in relation to wireless technologies?
- A. Designs wireless chipsets
- B. Certified equipment to be compatible
- C. Promotes technology and standards development
- D. Brings wireless products to market
Answer: C
Explanation:
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
NEW QUESTION # 33
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.)
- A. Provides a failover environment for your production systems
- B. Provides a way to repurpose old hardware that is not ready for final removal
- C. Provides a safe environment in which to develop practical skills and knowledge of a technology and to test the technology
- D. Provides for testing to determine how much RF exposure you can tolerate
Answer: C
Explanation:
* 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)
NEW QUESTION # 34
In a Wi-Fi IoT deployment, which factor MOST affects the number of devices that can be supported by a single access point?
- A. The DHCP lease time
- B. Channel width and airtime utilization
- C. The Ethernet cable type used
- D. The SSID name length
Answer: B
Explanation:
Airtime utilization determines how many clients an AP can serve. Wider channels and high utilization reduce capacity. SSID names, DHCP timing, and cabling have minimal impact.
NEW QUESTION # 35
What function does the IEEE perform in relation to wireless technologies?
- A. Designs wireless chipsets
- B. Certified equipment to be compatible
- C. Promotes technology and standards development
- D. Brings wireless products to market
Answer: C
Explanation:
* 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/
NEW QUESTION # 36
What is the purpose of the duty cycle?limitation in LPWAN technologies such as LoRaWAN (EU region)?
- A. To limit how often devices transmit to avoid spectrum congestion
- B. To prevent device tampering
- C. To conserve device storage
- D. To increase the maximum data rate
Answer: A
Explanation:
Duty cycle regulations restrict transmission time in unlicensed bands to prevent RF congestion and ensure fair spectrum usage among devices.
NEW QUESTION # 37
In a wireless link, as the signal strength decreases, what else may decrease?
- A. Noise
- B. Transmission speeds
- C. Latency
- D. Interference
Answer: B
Explanation:
* Signal Strength and Data Rate: In wireless links, weaker signal strength often directly correlates to reduced transmission speeds. Modern wireless technologies use adaptive modulation and coding, sacrificing speed for reliability when signals become weaker.
* Noise and Interference: While these can impact performance, they don't inherently decrease simply because signal strength drops.
* Latency: Latency can be affected by poor signal, but its primary drivers are distance and network congestion.
References:
Wireless Signal Strength vs. Speed: Articles explaining the relationship and how adaptive modulation works.
Modulation and Coding Schemes (MCS): Technical descriptions of how Wi-Fi and other wireless technologies adjust speeds based on signal quality.
NEW QUESTION # 38
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