WGU D337 OBJECTIVE ASSESSMENT
FINAL LATEST 2026 ACTUAL EXAM TEST
BANK| D337 INTERNET OF THINGS AND
INFRASTRUCTURE OA FINAL EXAM
REVIEW WITH 350 REAL EXAM
QUESTIONS AND CORRECT VERIFIED
ANSWERS/ ALREADY GRADED A+
(MOST RECENT!!)
1. Which two components provide the connectivity for an IoT architecture?
(Choose 2)
A. Access network
B. Gateway
C. Sensor
D. Edge device
Correct Answer: A, B
Rationale: The access network (A) provides the infrastructure for devices to connect to a
broader network, while the gateway (B) acts as an intermediary that collects data from
sensors and transmits it to that network. Sensors (C) generate data but do not provide
connectivity themselves. Edge devices (D) process data but are not solely responsible for
the connectivity layer.
,2. Which building block of the IoT architecture is responsible for collecting raw
data generated by the monitored entity?
A. Actuator
B. Gateway
C. Processor
D. Sensor
Correct Answer: D
Rationale: A sensor is specifically designed to detect and measure physical phenomena
(temperature, motion, light) and convert that into a readable signal. An actuator (A)
performs an action. A gateway (B) forwards data. A processor (C) manipulates data.
3. What is the function of the customer edge device in the four-node edge
computing model?
A. Provides limited local storage and processing capabilities
B. Performs data aggregation and reduces transmission costs
C. Performs measurements and provides telemetry
D. Provides powerful storage and processing capabilities
Correct Answer: C
Rationale: In the four-node model (IoT Devices, Customer Edge, MEC, Central Platform),
the "Customer Edge Device" is actually the IoT device itself (like a sensor). Its primary
function is to perform the initial measurement and provide that telemetry data. The
"Customer Edge" node is sometimes mislabeled; the question refers to the device at the
very edge.
,4. An agricultural project integrates IoT soil sensors and automated irrigation.
Which communication protocol is best suited for low-power, long-range
transmission in rural areas where Wi-Fi coverage is limited?
A. Zigbee
B. LoRaWAN
C. Bluetooth
D. Ethernet
Correct Answer: B
Rationale: LoRaWAN is a Low-Power Wide-Area Network (LPWAN) technology explicitly
designed for long-range, low-bandwidth, battery-operated devices in scenarios like
agriculture. Zigbee (A) and Bluetooth (C) are short-range. Ethernet (D) requires wired
infrastructure.
5. A hospital implements IoT-enabled patient monitors. What is the primary
benefit of using edge computing in this scenario?
A. To reduce the cost of sensors
B. To enable real-time alerts for critical changes in patient condition
C. To increase the range of wireless signals
D. To store years of patient data locally
Correct Answer: B
Rationale: Edge computing processes data closer to the source (the patient monitor),
which drastically reduces latency. This allows for immediate analysis and alerting for
critical events, which is essential in a healthcare setting.
, 6. Which of the following best describes the "Internet of Bodies (IoB)"?
A. A network of industrial robots on a factory floor
B. Connected devices that monitor the human body and collect physiological data
C. A smart city's traffic management system
D. Cloud-based storage for medical records
Correct Answer: B
Rationale: The IoB is an extension of IoT specifically focused on devices that interact
with the human body, such as fitness trackers, ingestible sensors, and connected
medical implants.
7. A logistics company wants to ensure a refrigerated container maintains a
specific temperature during transit. Which type of device would automatically
adjust the cooling unit if the temperature rises above a set point?
A. Sensor
B. Actuator
C. Gateway
D. Router
Correct Answer: B
Rationale: An actuator receives an electronic signal and converts it into a physical
action. In this case, it would receive a command to engage the cooling mechanism. The
sensor (A) would detect the temperature change, but the actuator performs the action.
8. What is the primary characteristic of the "3rd Wave of IoT"?
A. Connecting everyday objects to a network
B. Developing new sensor technologies
FINAL LATEST 2026 ACTUAL EXAM TEST
BANK| D337 INTERNET OF THINGS AND
INFRASTRUCTURE OA FINAL EXAM
REVIEW WITH 350 REAL EXAM
QUESTIONS AND CORRECT VERIFIED
ANSWERS/ ALREADY GRADED A+
(MOST RECENT!!)
1. Which two components provide the connectivity for an IoT architecture?
(Choose 2)
A. Access network
B. Gateway
C. Sensor
D. Edge device
Correct Answer: A, B
Rationale: The access network (A) provides the infrastructure for devices to connect to a
broader network, while the gateway (B) acts as an intermediary that collects data from
sensors and transmits it to that network. Sensors (C) generate data but do not provide
connectivity themselves. Edge devices (D) process data but are not solely responsible for
the connectivity layer.
,2. Which building block of the IoT architecture is responsible for collecting raw
data generated by the monitored entity?
A. Actuator
B. Gateway
C. Processor
D. Sensor
Correct Answer: D
Rationale: A sensor is specifically designed to detect and measure physical phenomena
(temperature, motion, light) and convert that into a readable signal. An actuator (A)
performs an action. A gateway (B) forwards data. A processor (C) manipulates data.
3. What is the function of the customer edge device in the four-node edge
computing model?
A. Provides limited local storage and processing capabilities
B. Performs data aggregation and reduces transmission costs
C. Performs measurements and provides telemetry
D. Provides powerful storage and processing capabilities
Correct Answer: C
Rationale: In the four-node model (IoT Devices, Customer Edge, MEC, Central Platform),
the "Customer Edge Device" is actually the IoT device itself (like a sensor). Its primary
function is to perform the initial measurement and provide that telemetry data. The
"Customer Edge" node is sometimes mislabeled; the question refers to the device at the
very edge.
,4. An agricultural project integrates IoT soil sensors and automated irrigation.
Which communication protocol is best suited for low-power, long-range
transmission in rural areas where Wi-Fi coverage is limited?
A. Zigbee
B. LoRaWAN
C. Bluetooth
D. Ethernet
Correct Answer: B
Rationale: LoRaWAN is a Low-Power Wide-Area Network (LPWAN) technology explicitly
designed for long-range, low-bandwidth, battery-operated devices in scenarios like
agriculture. Zigbee (A) and Bluetooth (C) are short-range. Ethernet (D) requires wired
infrastructure.
5. A hospital implements IoT-enabled patient monitors. What is the primary
benefit of using edge computing in this scenario?
A. To reduce the cost of sensors
B. To enable real-time alerts for critical changes in patient condition
C. To increase the range of wireless signals
D. To store years of patient data locally
Correct Answer: B
Rationale: Edge computing processes data closer to the source (the patient monitor),
which drastically reduces latency. This allows for immediate analysis and alerting for
critical events, which is essential in a healthcare setting.
, 6. Which of the following best describes the "Internet of Bodies (IoB)"?
A. A network of industrial robots on a factory floor
B. Connected devices that monitor the human body and collect physiological data
C. A smart city's traffic management system
D. Cloud-based storage for medical records
Correct Answer: B
Rationale: The IoB is an extension of IoT specifically focused on devices that interact
with the human body, such as fitness trackers, ingestible sensors, and connected
medical implants.
7. A logistics company wants to ensure a refrigerated container maintains a
specific temperature during transit. Which type of device would automatically
adjust the cooling unit if the temperature rises above a set point?
A. Sensor
B. Actuator
C. Gateway
D. Router
Correct Answer: B
Rationale: An actuator receives an electronic signal and converts it into a physical
action. In this case, it would receive a command to engage the cooling mechanism. The
sensor (A) would detect the temperature change, but the actuator performs the action.
8. What is the primary characteristic of the "3rd Wave of IoT"?
A. Connecting everyday objects to a network
B. Developing new sensor technologies
