Session 13: Communication protocols and Protocol Stack for the Edge devices

Question 1

Key characteristics of communication protocols?

Answer 1

• Data format
• Error detection and correction
• Flow control
• Security features

Question 2

Common communication protcols for edge devices?

Answer 2

• MQTT : Message Queuing Telemetry Transport
• CoAP : Constrained Application Protocol
• LwM2M : Lightweight Machine-to-Machine
• AMQP : Advanced Message Queuing Protocol
• DDS : Data Distribution Service

Question 3

Uses of MQTT, CoAP, AMQP, DDS

Answer 3

MQTT :
* For resource constraints devices (Memory, battery)
* Widely supported across different network
* Offer good scalability for large-scale deployments

CoAP :
* For resource constraints devices (Memory, battery)

AMQP :
* Offers robusst security features

DDS :
* Real-time data exchange

Question 4

Protocol stack?

Answer 4

Physical layer:
* Ethernet
* WIFI
* Bluetooth

Data Link layer:
* Ethernet
* WIFI

Network Layer:
* IP

Transport Layer:
* TCP
* UDP

Application layer:
* MQTT
* CoAP
* LwM2M

Question 5

Benifits of Protocol stack?

Answer 5

1. Modular design
2. Interoperability
3. Abstraction
4. Scalability
5. Maintenance and Troubleshooting