The OSI model breaks down how computers talk into seven organized steps. This makes it easier to understand how information travels from one screen to another.

The Seven Layer Concept

When you send a message, it travels from layer seven down to layer one. Each layer adds a 'wrapper' of instructions to help the message reach its goal.

Sending Data Down the Stack

When data arrives at your computer, it moves from layer one up to layer seven. Each layer removes a wrapper until only the original message is left for you to see.

Receiving Data Up the Stack

The Journey of a Message

Getting the Message Ready

Layer 4: Breaking into Pieces

Layer 3: Adding the IP Address

Layer 2: The Final Envelope

Layer 1: Turning Data into Light

The Russian Doll Metaphor

Your Data is Sent!

OSI Model Layers