Fog computing is an extension of cloud computing. It extends cloud capabilities to the edge of the network and brings processing closer to the data source. This helps in reducing latency and improving efficiency, making it suitable for IoT and other applications.

Device integrity in IoT pertains to ensuring the trustworthiness of the device's components. This includes verifying that the hardware, software, and data haven't been tampered with, which is essential for maintaining the security of IoT devices.

Python is often recommended for beginners in IoT development due to its simplicity, readability, and extensive libraries like MicroPython and CircuitPython designed for microcontrollers. Klingon, Brainfuck, and Assembly are not suitable for beginners due to their complexity and lack of IoT-specific libraries.

In the realm of IoT, M2M (Machine-to-Machine) communication is when devices autonomously communicate with each other without human intervention. This kind of communication is at the heart of the IoT concept, where devices exchange data and instructions seamlessly.

A smart city using sensors to manage traffic in real-time is an example of M2M (Machine-to-Machine) communication. In this scenario, sensors and machines (traffic management systems) communicate with each other to optimize traffic flow and enhance overall city efficiency without direct human involvement.

Devices that have a predefined lifespan after which they should be decommissioned to ensure network security are following the "End-of-Life" principle. This means that after a certain period, these devices are no longer supported and should be replaced or upgraded to maintain security. This is crucial in preventing vulnerabilities that may arise from outdated or unsupported hardware.

The process of ensuring that an IoT device operates within its intended purpose and network is called "Device lifecycle management." It involves activities like provisioning, configuration, monitoring, and maintenance to keep the device functioning as expected.

The term "Internet of Things" (IoT) was first coined by Kevin Ashton, a British technology pioneer, in the late 1990s. Ashton used this term to describe a network of objects or "things" connected to the internet, which could communicate and share data without human intervention. This concept laid the foundation for the IoT we know today.

The vision of a global network of interconnected computer networks, which laid the foundation for the Internet of Things (IoT), was first proposed by "J.C.R. Licklider." His ideas and contributions to the development of the ARPANET, a precursor to the internet, were instrumental in shaping the concept of IoT.

CoAP (Constrained Application Protocol) is designed specifically for IoT scenarios where resources like memory and bandwidth are limited. It's a lightweight and efficient protocol that is well-suited for IoT devices with constrained capabilities. Unlike HTTP and TCP, CoAP is tailored for these resource-constrained environments.