1 2 3 2 2 1 1 Your laptop Router 1 Router 2 Router 3 Router 4 Web server received at the server
1 2 3 4 Step Play New journey packets3 4 5 6 lossnone some heavy routingstatic dynamic
Keys: Space play or pause, → step, R reset
On the wire step 0 / 25 Press Step to send the packets. The activity below shows how the layers prepare a message for transmission.
Static mode sends every packet along the same fixed route. Dynamic mode randomly chooses next hops that move closer to the server. Packets may arrive out of order, and the server reassembles them using their numbers. Real dynamic routing updates routes using network information. That updating is outside this activity.
A2.1.5 HL, the layers
Order the layers The message passes down the sender's four layers, which add the information needed for transmission. It then passes up the server's layers, which read and remove that information. Put the eight steps in order.
across the wire, then server removes headers ↑
the eight steps, click in order
↑ Application(server) ↑ Network Interface(server) ↓ Transport↓ Network Interface↑ Transport(server) ↓ Internet↓ Application↑ Internet(server) Shuffle Reveal order 0/8 placed
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