Describe layers of IoT Architecture.

The Internet of Things (IoT) is a complex ecosystem consisting of various devices, networks, and cloud services that work together to provide seamless connectivity and automation. To manage this complexity, IoT systems are typically structured in layers, each serving a distinct function. The layered architecture ensures interoperability, scalability, and security across different components of the IoT ecosystem. Understanding these layers is crucial for implementing robust security mechanisms to protect data, devices, and communications from cyber threats. The IoT architecture is generally divided into five key layers:  

### 1. Perception Layer  
The perception layer is the lowest layer in the IoT architecture and is responsible for interacting with the physical environment. This layer includes sensors, actuators, RFID tags, cameras, and other edge devices that collect data from the surroundings. Since it directly interfaces with the physical world, the perception layer is vulnerable to several security threats such as physical tampering, spoofing, and unauthorized access.  

#### Security Concerns in the Perception Layer:  
- Tampering Attacks: Attackers can physically access IoT devices and alter their functionality.  
- Eavesdropping: Wireless communication between sensors and gateways can be intercepted.  
- Node Capturing: Attackers can capture and reprogram ___ _________ _______ ____ ____ ______ __________ _______ ________ ______.
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