Reading the Network: netstat, ss & nmap Explained
Master ss, netstat, and nmap to see every open port, active connection, and service on your system. Real terminal output walkthroughs and pro security tips.
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Networking
8 articles
Learn DNS, TCP/IP, protocols, troubleshooting, and network fundamentals.
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TCP vs UDP: The Visual Guide for Beginners
Why does video lag but emails never arrive broken? The difference between Reliable (TCP) and Fast (UDP) protocols explained.
What is a Port? The Visual Guide to Network Ports
Every network connection uses a port number. Learn what ports are, why they exist, and how TCP/UDP ports work with real-world analogies and hands-on commands.
Top 20 Network Ports Every IT Pro Must Know
The definitive visual guide to the 20 most important network ports. Not just a list — each port comes with real-world context, a story, and a security insight.
IP Addressing Explained for Beginners
Understand IPv4 addresses, subnet masks, public vs private IPs, and CIDR notation with visual diagrams and practical examples.
The OSI Model: 7 Layers Explained Visually
Understand the OSI Model's 7 layers with real-world analogies, visual diagrams, and practical examples. The foundation of all networking knowledge.
How the Internet Works: A Visual Journey for Absolute Beginners
What happens when you type google.com? Follow your data's incredible journey across the internet in this visual guide.
How DNS Works: The Internet's Phone Book Explained
Learn how DNS translates domain names to IP addresses in under 100 milliseconds. Visual guide with step-by-step breakdown.