Introduction To Internet Of Things Week 2 NPTEL Assignment Answers 2025

NPTEL Introduction To Internet Of Things Week 2 Assignment Answers 2025

1. The full form of MQTT is
a. Message Query Telemetry Transport
b. Message Queue Telemetry Transport ✅
c. Message Queue Telemedicine Transport
d. None of these

Explanation: MQTT stands for Message Queue Telemetry Transport. It is a lightweight messaging protocol ideal for small sensors and mobile devices.

---

2. In MQTT, a ____________ controls the publish-subscribe messaging pattern.
a. Message Broker ✅
b. Publishers
c. Subscribers
d. All of these

Explanation: The Message Broker is responsible for receiving all messages, filtering them, and distributing them to subscribers.

---

3. Which of the following is NOT a Data Protocol in IoT?
a. MQTT
b. CoAP
c. Websocket
d. None of these ✅

Explanation: All three listed—MQTT, CoAP, and WebSocket—are valid data communication protocols used in IoT, so the correct answer is “None of these.”

---

4. In MQTT for IoT, the Publishers are
a. Lightweight sensors ✅
b. Actuators
c. Processing units
d. None of these

Explanation: In IoT, lightweight sensors often act as publishers, sending data to the broker.

---

5. Which of the following is NOT a method in MQTT?
a. Break ✅
b. Connect
c. Disconnect
d. None of these

Explanation: “Connect” and “Disconnect” are valid MQTT methods. “Break” is not part of MQTT.

---

6. Which of the following protocols in IoT have been designed for Machine to Machine (M2M) applications such as smart energy and building automation?
a. MQTT
b. CoAP ✅
c. WebSocket
d. All of these

Explanation: CoAP (Constrained Application Protocol) is specifically designed for M2M applications in constrained environments.

---

7. Similar to HTTP, CoAP utilizes which of the following for operation?
a. GET
b. PUT
c. PUSH
d. All of these ✅

Explanation: CoAP uses request methods like HTTP, such as GET, PUT, POST, and DELETE.

---

8. What is the full form of XMPP in IoT?
a. Extensible Markup Page Processing
b. Extensible Messaging and Presence Protocol ✅
c. Both (a) and (b)
d. Neither (a) nor (b)

Explanation: XMPP stands for Extensible Messaging and Presence Protocol, used for real-time messaging.

---

9. State whether the following statement is True or False.
Statement: XMPP is an open standard protocol.
a. True ✅
b. False

Explanation: XMPP is an open standard communications protocol used in real-time applications.

---

10. What is the full form AMQP in context of IoT protocol?
a. Another Message Queuing Protocol
b. Anchored Message Queuing Protocol
c. Advanced Message Queuing Protocol ✅
d. None of these

Explanation: AMQP stands for Advanced Message Queuing Protocol. It enables robust communication between systems.

---

11. What is the basic unit of data in the AMQP protocol?
a. Chunk
b. Byte
c. Frame ✅
d. None of these

Explanation: In AMQP, Frame is the basic unit of data transmission.

---

12. Which of the following is/are exchange types in AMQP?
a. Direct
b. Fan-out
c. Topic
d. All of these ✅

Explanation: AMQP supports multiple exchange types—Direct, Fan-out, Topic, and Headers.

---

13. IoT networks can be classified in which of the following type/types?
a. Non-Beacon Enabled
b. Beacon Enabled
c. None of these
d. Both (a) and (b) ✅

Explanation: IoT networks can be either Beacon-enabled or Non-beacon-enabled based on how they transmit signals.

---

14. The OSI model has ________ layers.
a. 6
b. 7 ✅
c. 4
d. 8

Explanation: The OSI (Open Systems Interconnection) model has 7 layers, from Physical to Application layer.

---

15. The “Destination Address” in the IPv4 packet represents which of the following?
a. The destination node address of the packet ✅
b. The intermediate hop in the network
c. Both (a) and (b)
d. None of these

Explanation: The Destination Address field in IPv4 specifies the final target of the packet.