IOT Questions on “IoT Architecture for Precision Agriculture”.
1. Which protocol is used to link all the devices in the IoT?
a) TCP/IP
b) Network
c) UDP
d) HTTP
Answer: a
Clarification: 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
Clarification: 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
Clarification: 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
Clarification: 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
Clarification: 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
Clarification: 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
Clarification: 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
Clarification: 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
Clarification: 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
Clarification: 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.
11. Which protocol interacts asynchronously over UDP?
a) HMTP
b) CoAP
c) MQTT
d) TCP/IP
Answer: b
Clarification: CoAP is an application layer protocol (IETF draft) for resource constrained devices. It is Asynchronous message interactions over UDP, Request/Response semantics CoAP resources are identified by Uniform Resource Identifiers.
12. CoAP messages are short.
a) True
b) False
Answer: a
Clarification: CoAP messages are short – 4 bytes header followed by options (Typically, 10-20 bytes header).
13. How many messages types are there in CoAP?
a) 2
b) 5
c) 3
d) 4
Answer: d
Clarification: Four message types are:
Confirmable
Non confirmable
Acknowledgments
Reset.
14. Number of methods in CoAP?
a) 2
b) 5
c) 4
d) 3
Answer: c
Clarification: Four CoAP methods:
GET
POST
PUT
DELETE.
15. WSN stands for __________
a) Wired Sensor Network
b) Wireless Sensor Network
c) Wired Service Network
d) Wireless Service Network
Answer: b
Clarification: WSN – Wireless Sensor Network comprises of motes running a WSN application and a light weight CoAP server.