Encapsulation Simulator

HTTP through the OSI / TCP-IP layers

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Layer stack

Welcome!

This simulator shows how an HTTP request travels from the PC to a web server and how the answer comes back.

  1. Choose the destination: the internal web server or the public web server on the Internet.
  2. Type the data to send, for example GET /index.html or Hello world.
  3. Click Start simulation, then Next (or press →) to move the data one layer at a time.

You can change the IP address of the public web server directly in the diagram.

Content of the information

No data yet. Start the simulation.
Show raw bytes (hex dump) 

        

      


      
      

        
Tables of the devices

        

        

          
Legend

          
Application data (HTTP)

          
TCP header (layer 4)

          
IP header (layer 3)

          
Ethernet header / trailer (layer 2)

          
Preamble / bits (layer 1)

          
Field changed in this step