Learn about IP addresses, DNS, VPNs, cybersecurity, and how the Internet works.
Everything you need to know about IP addresses — IPv4, IPv6, public vs private, and why they matter.
The differences between IPv4 and IPv6, and why the world is transitioning to the new protocol.
VPN, proxy, Tor — all the ways to protect your privacy online and mask your real IP.
Port 80, 443, 22, 21 and more — what each port does and why it matters for security.
How DNS translates domain names into IP addresses and how to perform DNS lookups.
15 essential tips to protect yourself online — passwords, 2FA, phishing, and more.
The real differences between VPNs and proxies, and when to use each one.
What's the difference? Why your router has two IPs and how they work together.
Which one do you need? Pros, cons, and when each type makes sense.
How websites know your location from your IP address, and how accurate it really is.
Step-by-step guide to change your IP on any device and operating system.
The fundamental protocol suite that powers the Internet, explained from scratch.
How firewalls protect your network, types of firewalls, and best practices.
The loopback address, local development, and why 127.0.0.1 always points to your own machine.
How subnet masks divide networks and the math behind CIDR notation.
Your network's door to the Internet — how to find it, configure it, and fix it.
The most basic network tool — learn to use ping like a pro.
Recursive, authoritative, and caching DNS servers — and which ones to use.
Port scanning for security audits — tools, techniques, and ethical considerations.