CS-801 Internet of Things - May 2022 Question Paper

Under each question, How to answer lists the points an answer should cover, outlined by CampusPrep from the syllabus. Check the details against your textbook.

1. 7 Marks
   aDescribe IoT reference architecture and information model.
   How to answer

   • Definition of IoT reference architecture and its layers/levels
   • Information model - virtual vs physical entities, domain and information model
   • Relationship between functional and information views
   • Diagram of reference architecture
2. 7 Marks
   bExplain M2M communication and bring out differences between IoT and M2M. How data analytics approaches different in M2M and IoT.
   How to answer

   • Definition and characteristics of M2M communication
   • Differences between IoT and M2M on communication, devices, data, application
   • Data analytics approach in M2M vs IoT - centralized vs cloud/big-data analytics
   • Examples
3. 7 Marks
   aWhat are various IoT Communication models? Draw and explain them in brief.
   How to answer

   • List four IoT communication models: request-response, publish-subscribe, push-pull, exclusive pair
   • Brief working of each model
   • Diagram for each model
   • Example protocols for each
4. 7 Marks
   bDraw and explain IoT level 3 and level 4 system. Give suitable examples for them.
   How to answer

   • Structure of IoT level-3 system with cloud and local analysis
   • Structure of IoT level-4 system with multiple nodes and cloud
   • Key differences and data flow
   • Suitable examples for each level
5. 7 Marks
   aWhat is IEEE 802.15.4 protocol? How is it related to IoT?
   How to answer

   • Definition and features of IEEE 802.15.4 LR-WPAN standard
   • PHY and MAC layer functions, topologies
   • Role as link layer for 6LoWPAN, ZigBee in IoT
   • Relation to constrained IoT devices
6. 7 Marks
   bHow might Internet Address (IPv6) affect the development and implementation of the Internet of Things?
   How to answer

   • IPv6 address space and need for billions of IoT devices
   • Auto-configuration, header, QoS and security features
   • Impact on scalability, interoperability and deployment
   • Challenges of migration and management
7. 7 Marks
   aWhat is the use of application layer protocols? Differentiate between AMQP and MQTT. Does MQTT use WebSockets?
   How to answer

   • Use of application layer protocols in IoT interoperability
   • Comparison of AMQP vs MQTT on architecture, overhead, reliability
   • MQTT over TCP and WebSockets support
   • Use cases for each
8. 7 Marks
   bExplain CoAP. How it can be used between devices on the same constrained network? Justify it.
   How to answer

   • Definition and features of CoAP - REST, UDP, constrained nodes
   • Client-server interaction and methods
   • Use between devices on same constrained network
   • Justification with low overhead and resource discovery
9. 7 Marks
   aExplain principles of RFID. How are RFID and the Internet of Things linked?
   How to answer

   • Principle of RFID - tags, readers, coupling and frequencies
   • Types of tags and working steps
   • Linkage of RFID with IoT for identification and tracking
   • IoT applications using RFID
10. 7 Marks
    bExplain Software Defined Networking. Is SDN a mature technology? Justify it.
    How to answer

    • Definition and architecture of SDN - control and data plane separation
    • Components: controller, OpenFlow, APIs
    • Maturity assessment with deployments and challenges
    • Justification with reasons
11. 7 Marks
    aDefine Near Field Communication technologies and their applications.
    How to answer

    • Definition of NFC and operating principle - inductive coupling
    • Modes: reader/writer, peer-to-peer, card emulation
    • Key features - range, frequency, data rate
    • Applications in payment, access, IoT
12. 7 Marks
    bExplain the applications of IoT in home automation systems.
    How to answer

    • Concept of smart home and IoT ecosystem
    • Applications: lighting, HVAC, security, energy management
    • Sensors, actuators and control flow
    • Benefits and examples
13. 7 Marks
    aDiscuss the building blocks of IoT. What are the most used sensors types in IoT?
    How to answer

    • Building blocks: sensing, processing, connectivity, cloud, analytics, UI
    • Role of each block
    • Most used sensor types - temperature, humidity, PIR, ultrasonic etc.
    • Examples of sensor selection
14. 7 Marks
    bHow Raspberry pi (3) is different from desktop computer. Write use of SPI, I2C interfaces and GPIO pins of Raspberry pi (3).
    How to answer

    • Differences: architecture, OS, power, GPIO, cost, purpose
    • Raspberry Pi 3 specs vs desktop computer
    • Use of SPI for serial peripheral devices
    • Use of I2C and GPIO pins for sensors/actuators
15. 7 Marks
    aExplain various security concerns related to IoT? Discuss in detail.
    How to answer

    • Security concerns at device, network and application layers
    • Issues: privacy, authentication, data integrity, availability
    • Resource constraints and heterogeneity challenges
    • Mitigation approaches in detail
16. 7 Marks
    bWhich kinds of vulnerability have been observed in IoT. Which attacks can exploit the vulnerabilities in Application/Service Layer?
    How to answer

    • Types of IoT vulnerabilities - weak passwords, insecure interfaces, lack of updates
    • Application/Service layer vulnerabilities
    • Attacks exploiting them: injection, XSS, DoS, data theft
    • Countermeasures