Explain connectivity technologies in detail.

The Internet of Things (IoT) connects billions of devices worldwide, enabling seamless communication and automation across industries. However, securing these connections is a critical challenge, as cyber threats continue to evolve. Understanding connectivity technologies in IoT is essential to ensure robust security measures. These technologies include wired and wireless options, each with distinct advantages and vulnerabilities. The major connectivity technologies in IoT are as follows:  

### 1. Wired Connectivity Technologies  

Wired connectivity provides stable and secure communication for IoT devices. Though less flexible than wireless solutions, wired connections are often preferred for security-sensitive applications.  

#### a. Ethernet  
Ethernet is one of the most reliable wired connectivity options for IoT. It offers high-speed data transmission, low latency, and strong security features. Since it uses physical cables, the risk of unauthorized access is lower than in wireless networks. However, Ethernet requires extensive infrastructure, making it less suitable for large-scale deployments.  

Security Considerations:  
- Use strong encryption (e.g., TLS/SSL) to secure data transmissions.  
- Implement network segmentation to isolate IoT devices from critical infrastructure.  
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