25 | What is Subnet Mask and Virtual LAN | System Administration

A subnet mask helps divide a large network into smaller parts, making it easier to manage and secure. It separates the network portion from the host portion of an IP address, ensuring efficient data routing. By using subnet masks, organizations can control how devices communicate and reduce unnecessary traffic. On the other hand, VLANs (Virtual Local Area Networks) allow businesses to group devices within a network, even if they are physically apart. This improves security, reduces congestion, and makes it easier to organize devices based on departments or functions.

Understanding subnet masks and VLANs is essential for building a strong and secure network. Subnetting helps in optimizing IP address allocation, while VLANs allow better network segmentation and traffic management. Together, they enhance security, boost performance, and provide better control over network traffic. Whether you're a beginner or an IT professional, knowing how these technologies work will help in managing and troubleshooting networks efficiently.

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