Seven Layers · One Framework · Infinite Networks
Master the Open Systems Interconnection model — the universal language of network communication used by every cybersecurity professional.
// REFERENCE MODEL · ISO/IEC 7498-1
Click any layer to expand details. Layers are numbered from the bottom (Physical) to the top (Application).
// MEMORY AID
All People Seem To Need Data Processing
// INTERACTIVE HANDS-ON LAB
Three exercises to reinforce OSI understanding through packet simulation, protocol sorting, and a graded knowledge check.
OBJECTIVE: Watch how your message gets encapsulated — wrapped with a new header at each layer as it travels DOWN the OSI stack from sender to wire.
Type any message, then press NEXT LAYER to step through the process one layer at a time.
OBJECTIVE: Drag each protocol chip from the pool and drop it onto the correct OSI layer drop zone.
A chip turns green when correctly placed. Red means wrong layer — try again. Place all 20 to complete the lab.