An interactive deep-dive into all 7 OSI layers — from physical signal transmission at Layer 1 through Ethernet frames, IP packets, TCP segments, all the way to HTTP at Layer 7. Covers encapsulation, protocol examples at each layer, and why the model exists.
You'll be able to click any layer to expand it, see what protocols live there, and trace a real packet as it moves up and down the stack.
← go back homeAs data travels down the stack (sender), each layer wraps the payload with its own header. Going up (receiver), each layer strips its header. The highlighted block is what each layer adds.