What part(s) of the OSI network model does the IETF primarily focus on for the development f standards?
- A . Physical Layerand above
- B . All layers
- C . Network Layer and above
- D . Data Link Layer
What organization maintains and publishes the 802.15.4 Standard?
- A . Bluetooth SIG
- B . IEEE
- C . IETF
- D . Zigbee Alliance
What is the most common difference between a single board computer (SBC) and a controller board?
- A . SBCs typically have connectors for display and input devices while controller boards do not
- B . Controller boards have I/O headers and SBCs do not
- C . SBCs always have connectors for M2 devices and controller boards do not
- D . Controller boards have more powerful processors than most SBCs
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 for testing to determine how much RF exposure you can tolerate
- B . Provides a failover environment for your production systems
- C . Provides a way to repurpose old hardware that is not ready for final removal
- D . Provides a safe environment in which to develop practical skills and knowledge of a technology and to test the technology
What is the typical range of a wireless body area network (WBAN)?
- A . 1-2 meters
- B . 10 square meters
- C . 10 centimeters
- D . 10 meters
What software is typically stored in ROM and is used to initialize a device?
- A . Firmware
- B . Application
- C . Container
- D . Service
You have been asked to consider smart building opportunities for your organization.
Which one of these is a benefit of smart building technology?
- A . Increased vacation time for building managers
- B . Improved operational efficiency
- C . Reduced design and construction costs
- D . Faster Wi-Fi connectivity
What best describes the area covered or connected by a WWAN?
- A . City
- B . Campus
- C . Region
- D . In-building
What function does the IEEE perform in relation to wireless technologies?
- A . Promotes technology and standards development
- B . Designs wireless chipsets
- C . Certified equipment to be compatible
- D . Brings wireless products to market
What is the benefit of using SINR as opposed to SNR to reference signal quality at a receiver?
- A . SINR includes interference as well as the noise floor
- B . SNR excludes the noise floor, which skews the results
- C . SINR excludes interference and only measures the noise floor
- D . SNR includes interference measurements that skew the results
What is defined as the weakening of signal amplitude as the signal passes through a medium?
- A . Diffraction
- B . Reflection
- C . Attenuation
- D . Scattering
How is ASK modulation different from FSK modulation?
- A . ASK varies the amplitude of the signal while FSK shifts its frequency
- B . FSK is more sensitive to noise than ASK
- C . ASK does not work at high frequencies
- D . ASK can carry more data than FSK
What does the number in the various Quadrature Amplitude Modulation levels, such as 16 in QAM-16 and 64 in QAM-64, indicate? (Choose the single best answer.)
- A . The speed of data transfer, which is four times the number in the QAM level
- B . The channel width, which is stipulated in MHz
- C . The number of target points in the QAM constellation, which are equivalent to amplitude and phase combinations
- D . The number of spatial streams, which is 1/4 the number in the QAM level
What modulation is used by LoRa?
- A . OFDMA
- B . CSS
- C . ASK
- D . OFDM
What primary component is required to implement a wireless transceiver in a device?
- A . GPIO pins
- B . SRAM
- C . Flash memory
- D . Radio
How does OFDMA differ from OFDM?
- A . Subcarriers of OFDMA can contain data destined for a different receiver
- B . OFDMA offers greater range by using multiple channels at once
- C . OFDMA allows multiple devices to transmit simultaneously on the same frequency
- D . OFDMA uses multiple radios to achieve higher throughput
What metric is used to express a relative increase or decrease in signal strength?
- A . W
- B . dBm
- C . dB
- D . mW
As an RF signal propagates it becomes weaker at any given measurement point as it gets farther away from the transmitter.
What concept is described?
- A . RF latency
- B . Free Space Path Loss
- C . Beamwidth
- D . Diffraction
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
What is most often used to track livestock on large farms and identify each animal Individually?
- A . Photodiode sensors
- B . RFID tags
- C . 802.11 wireless radios
- D . Thermistor sensors