Carla and Kacper kicked off the lesson, acting as “human routers’ delivering IP packets to their destinations around the room. Each packet was time bound (known as the “time to live”) so each router needed to complete delivery as quickly as possible to avoid “data loss”. Recipients discovered that each packet contained what is known as the “payload”, comprising of 1s and 0s.
The following episode saw Pawel and Anna modelling the three modes of data transmission, using excerpts for Martin Luther King’s “I have a dream…” speech. To begin, Pawel read a paragraph to Anna, demonstrating Simplex data transmission, where one device sends and the other receives/listens. Simple, right? Next, Anna and Pawl each read further paragraph to each other, but one at a time – modelling Half Duplex data transmission, where data flows in both directions, but only one at a time. Finally, Pawel and Anna both read different excerpts simultaneously, demonstrating Full Duplex transmission. This mode is the quickest but, as Year 10 observed, can lead to “data collisions” and unclear messaging.