See how the internet happens.
One website. A remarkable journey between devices.
Watch Laptop A send directly to Laptop B.
Choose Star, Tree or Mesh, then play the local packet. The moving route shows exactly why Laptop B is part of the topology.
Press play and follow a request from your laptop to a web server, and back again.
Star, Tree and Mesh describe the LAN here, not the shape of the entire internet. The router, firewall, DNS resolver and web server retain their roles. Mesh shows a settled, simplified spanning-tree result: an unused healthy link remains on standby to prevent a switching loop. The router, firewall and external services remain common to every layout.
What happens when you open a website?
Press play and follow a request from your laptop to a web server, and back again.
One message. Different responsibilities.
Select a layer, then inspect its fields. The same message is carried inside each successive wrapper.
Outbound example at the laptop, before NAT. Selected fields and values are illustrative; panel widths are not byte lengths. HTTP is shown before encryption for learning. TCP and lower layers carry TLS-protected bytes.