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What is the Internet?
A global network of interconnected computers.
When was the Internet invented?
Around late 1960s (October 1969).
Who led the invention of the Internet?
US Department of Defense.
Why was the Internet invented?
To create a robust network that can withstand partial outages.
What are the five Internet Eras?
Internet of Documents, Internet of Commerce, Internet of Applications, Internet of People, Internet of Things.
What is the Internet of Things (IoT)?
A system of physical objects that can be discovered, monitored, controlled, or interacted with via electronic devices over the internet.
What makes a device smart in IoT?
Sensors, Actuators, Computation, Communication Interfaces.
Give an example of a basic IoT interaction.
A smart TV communicating with an electric curtain to adjust lighting.
What is the role of the Internet in IoT?
Provides connectivity for devices to communicate and interact remotely.
What are the advantages and disadvantages of Internet Protocols?
Stable and well-tested but high power consumption and lack of IP addresses.
What is a single-tier vs multi-tier IoT architecture?
Single-tier is direct communication, multi-tier uses multiple transport layers like gateways.
What are the four key layers of IoT architecture?
Smart Things Layer, Connectivity Layer, Data Layer, Application Layer.
What are examples of IoT sensors?
Temperature, Humidity, GPS, Pressure, Light.
What is the role of the Connectivity Layer in IoT?
Handles communication between devices, networks, and cloud services.
What are common IoT connectivity technologies?
Ethernet, WiFi, Bluetooth, Zigbee, NFC, LPWAN, Cellular.
What is an IoT Gateway?
A bridge that translates different communication protocols.
