Internet of Things Questions and Answers Part-7

1. Which protocol is used to link all the devices in the IoT?
a) TCP/IP
b) Network
c) UDP
d) HTTP

Answer: a
Explanation: The internet of Thing is the global system of interconnected computer networks that use the Internet Protocol suite (TCP/IP) to link billions of devices worldwide.

2. _______ enables seamless integration of LoWPAN devices with internet leveraging.
a) IETF 6LoWPAN
b) IEFT CoAP
c) RFID/NFC
d) IEEE 802.15.4.LoWPAN

Answer: a
Explanation: IETF 6LoWPAN enables seamless integration of LoWPAN devices with internet leveraging IPv6 large address space and appln. Layer protocol reuse.

3. ________ enables open application layer for constrained nodes.
a) IETF 6LoWPAN
b) IEFT CoAP
c) RFID/NFC
d) IEEE 802.15.4.LoWPAN

Answer: b
Explanation: IETF CoAP – open application layer specification for constrained nodes supporting HTTP and Web integration.

4. ________ tags, devices, smart phones useful in identification.
a) IETF 6LoWPAN
b) IEFT CoAP
c) RFID/NFC
d) IEEE 802.15.4.LoWPAN

Answer: c
Explanation: RFID/NFC – tags, devices, smart phones useful in product / object identification and gathering associated information.

5. ________ supports low energy radio operation.
a) IETF 6LoWPAN
b) IEFT CoAP
c) RFID/NFC
d) Bluetooth

Answer: d
Explanation: Bluetooth SMART devices support low energy radio operations like, heart rate monitors, blood glucose monitors suitable for health care and fitness etc.

6. ________ specification defining the PHY and MAC layer of low power devices.
a) IETF 6LoWPAN
b) IEFT CoAP
c) RFID/NFC
d) IEEE 802.15.4.LoWPAN

Answer: d
Explanation: IEEE 802.15.4.LoWPAN – specification defining the PHY and MAC layer of low power devices supporting 250 Kb/s data rate, small packet size 127 bytes.

7. 6LoWPAN Adaption layer contains?
a) Header compression
b) Fragmentation
c) Layer 2 forwarding
d) Header compression, Fragmentation, and Layer 2 forwarding

Answer: d
Explanation: 6LoWPAN Adaption Layer:
Header compression
Fragmentation
Layer 2 forwarding.

8. ________ is an application layer protocol for resource constrained devices.
a) CoAP
b) HMTP
c) MQTT
d) TCP/IP

Answer: a
Explanation: CoAP is an application layer protocol (IETF draft) for resource constrained devices. Adheres to the Restful approach for managing the resources and support mapping to HTTP.

9. Adheres to ________ approach for managing resources and support mapping to HTTP.
a) RETful
b) IoT
c) Restful
d) RESTful

Answer: d
Explanation: CoAP is an application layer protocol (IETF draft) for resource constrained devices. Adheres to RESTful approach for managing resources and support mapping to HTTP.

10. _______ resources are identified by Uniform Resource Identifiers.
a) CoAP
b) HMTP
c) MQTT
d) TCP/IP

Answer: a
Explanation: CoAP is an application layer protocol (IETF draft) for resource constrained devices. Adheres to Restful approach for managing resources and support mapping to HTTP. CoAP resources are identified by Uniform Resource Identifiers.