Podcast
Questions and Answers
What is the primary function of HTTP in IoT communication?
What is the primary function of HTTP in IoT communication?
Communication between devices and web servers
Which mail protocol is used for retrieving email from a mail server?
Which mail protocol is used for retrieving email from a mail server?
POP3
What is the main purpose of the RPL routing protocol?
What is the main purpose of the RPL routing protocol?
Designed for low-power and lossy networks
What is the function of the Network layer (Layer 3) in the OSI model?
What is the function of the Network layer (Layer 3) in the OSI model?
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What is the primary difference between CoAP and HTTP?
What is the primary difference between CoAP and HTTP?
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What is the purpose of the Transport layer (Layer 4) in the OSI model?
What is the purpose of the Transport layer (Layer 4) in the OSI model?
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Study Notes
IoT Protocols
Web Protocols
- HTTP (Hypertext Transfer Protocol): used for communication between devices and web servers
- CoAP (Constrained Application Protocol): a lightweight, binary protocol for constrained devices and networks
- MQTT (Message Queuing Telemetry Transport): a lightweight, publish-subscribe-based messaging protocol
Mail Protocols
- SMTP (Simple Mail Transfer Protocol): used for sending and receiving email between devices
- POP3 (Post Office Protocol version 3): used for retrieving email from a mail server
- IMAP (Internet Message Access Protocol): used for retrieving and managing email on a mail server
Routing Protocols
- RPL (Routing Protocol for Low-Power and Lossy Networks): a routing protocol designed for low-power and lossy networks
- 6LoWPAN (IPv6 over Low-Power Wireless Personal Area Networks): a routing protocol for low-power wireless networks
- OLSR (Optimized Link State Routing Protocol): a routing protocol for mobile ad-hoc networks
OSI (Open Systems Interconnection) Model
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7 layers:
- Physical (Layer 1): defines physical means of data transmission
- Data Link (Layer 2): provides error-free transfer of data frames
- Network (Layer 3): routes data between devices
- Transport (Layer 4): provides reliable data transfer between devices
- Session (Layer 5): establishes, manages, and terminates connections
- Presentation (Layer 6): converts data into a format understood by the receiving device
- Application (Layer 7): provides services to end-user applications
TCP/IP (Transmission Control Protocol/Internet Protocol) Model
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4 layers:
- Network Access (Link Layer): combines OSI layers 1 and 2
- Internet (Network Layer): equivalent to OSI layer 3
- Transport (Transport Layer): equivalent to OSI layer 4
- Application (Application Layer): combines OSI layers 5, 6, and 7
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Description
Test your knowledge of IoT protocols, including HTTP, CoAP, MQTT, and more, as well as network models such as the OSI and TCP/IP models. Understand the different layers and their functions.
