Cybersecurity, learned like a practitioner.
24 learning paths · 398 modules live · every lesson written by someone who has shipped the control or run the engagement. Free to start.
Networking · modules
OSI layers, TCP/IP, subnetting, packet analysis — the foundation of every security skill.
NAT, PAT, and the IPv4 Internet’s Duct Tape
Network Address Translation maps private IPv4 addresses to public ones, allowing many devices to share a single public IP. PAT (Port Address Translation, often called NAPT or "NAT overload") is the variant most home routers and enterprise edges use. NAT is the duct-tape that kept
Packet Analysis with Wireshark — From “Open the PCAP” to Diagnosing Real Incidents
Wireshark is the universal protocol analyser. Every IR investigation, network design review, and "this protocol is misbehaving" debug eventually becomes a Wireshark session. This module teaches the workflow that distinguishes a beginner from a practitioner: capture filters vs dis
Networking Fundamentals — OSI, TCP/IP, and Why Layers Actually Matter
OSI is a teaching model. TCP/IP is what actually runs on the wire. Most "OSI questions" in interviews are really about how data physically moves between two computers — frames, packets, segments, sockets. This module gives you the working mental model: the four layers that matter
Practitioners who've
shipped the controls.
Every module is written by someone who has built the defence or run the engagement. No repackaged tutorials, no generic theory.
Why learn here
Practitioner-written.
Each lesson is authored by someone who has shipped the control or run the engagement in production.
Quiz after every module.
20+ questions with explanations. 70%+ to mark complete. Unlimited retries.
Progress tracked.
Completions, scores and streaks saved automatically. Resume exactly where you left off.
India-priced.
Start free. ₹499/mo for intermediate. ₹4,999/yr for advanced. No hidden fees, ever.