Why It Matters

Whether you’re working in IT support, system administration, or cybersecurity, having a solid grasp of network segmentation and subnetting is essential. These concepts form the backbone of modern network design and are critical for building secure, scalable, and high-performance environments.

Knowing how to segment a network properly allows you to:

• Control and limit access between departments (e.g., finance and HR)
• Isolate sensitive devices or servers from the rest of the network
• Reduce the spread of malware or unauthorized traffic in case of a breach
• Optimize network performance by minimizing unnecessary broadcast traffic

You’ll often apply this knowledge in real-world scenarios such as: