Introduction To Internet Of Things Week 7 NPTEL Assignment Answer 2025

NPTEL Introduction To Internet Of Things Week 7 Assignment Answer 2024

Q1. DHT Sensor refers to Digital Humidity and Temperature Sensor.
a. True
b. False
Answer: a
Explanation: DHT sensors are used to measure temperature and humidity digitally.

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Q2. Fill in the blanks. _____________is a python library used for plotting the data in 2D.
a. List
b. Numpy
c. Pandas
d. Matplotlib
Answer: d
Explanation: Matplotlib is a Python library specifically used for 2D data visualization and plotting.

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Q3. Fill in the blanks. _________ makes a scatter plot of the given points.
a. ion()
b. figure()
c. Scatter()
d. None of these
Answer: c
Explanation: scatter() is the correct function to make scatter plots in Python using matplotlib.

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Q4. What are the two main challenges of SDN?
a. File placement and Node placement
b. Rule placement and Controller placement
c. All of these
d. None of these
Answer: b
Explanation: The challenges in SDN mainly involve optimizing rule placement in switches and controller placement for efficient performance.

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Q5. In soft-timeout, all the rules are deleted from the switch.
a. True
b. False
Answer: b
Explanation: In soft-timeout, rules are deleted only if they are not used within a certain time, not all are deleted unconditionally.

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Q6. Which of the following is a component of SDN?
a. Hardware switches
b. Flow-rules
c. None of these
d. All of these
Answer: d
Explanation: SDN architecture includes hardware switches and flow rules managed by the controller.

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Q7. What is introduced if a controller is down in SDN?
a. Back up controller
b. Intro controller
c. All of these
d. None of these
Answer: a
Explanation: A backup controller is used for redundancy in SDN to handle failure of the main controller.

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Q8. Southbound API is used to communicate between control layer and application layer.
a. True
b. False
Answer: b
Explanation: Southbound APIs connect the control layer with the infrastructure layer (switches), not with the application layer.

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Q9. SDN is OpenFlow.
a. True
b. False
Answer: b
Explanation: OpenFlow is a protocol used within SDN, but SDN is a broader concept than just OpenFlow.

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Q10. Which of the following forwards the sensed data based on the ID of the source node?
a. Value-centric data forwarding
b. ID-centric data forwarding
c. All of these
d. None of these
Answer: b
Explanation: ID-centric data forwarding routes data based on the identity of the source node.

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Q11. Does integrating SDN in IoT provide intelligent routing decisions?
a. Yes
b. No
Answer: a
Explanation: SDN in IoT enables dynamic and intelligent routing based on network conditions and data needs.

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Q12. Are Indigo and LINC Open source?
a. Yes
b. No
Answer: a
Explanation: Both Indigo and LINC are open-source SDN controllers used in research and development.

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Q13. Which of the following is used to communicate among multiple controllers in the control layer?
a. East-Westbound APIs
b. Northbound APIs
c. All of these
d. None of these
Answer: a
Explanation: East-Westbound APIs handle communication between multiple SDN controllers for coordination.

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Q14. How many requests can a controller handle through a single thread?
a. 200/sec
b. 50/sec
c. None of these
d. All of these
Answer: a
Explanation: On average, a controller can process around 200 requests per second using a single thread.

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Q15. Size of the ternary content-addressable memory is not limited at the switches.
a. True
b. False
Answer: b
Explanation: TCAM (Ternary Content-Addressable Memory) size is limited in hardware switches, which can limit rule scalability.