Logical versus physical topology

At this point, you might be wondering what a topology actually is, so I think it is probably best that we clear that up first and foremost. In relation to networks, a topology can be thought of as a map that details how the network fits together and how the data travels. Topologies can be classed as either physical or logical. A physical topology describes how the devices are connected together, whereas a logical topology describes how the data travels from device to device. This can be quite difficult for people to understand, so what I would like you to do is think about getting to work, home, or the local shopping center. My journey is like this:

1. Cycle to the local train station.
2. Train from the local train station to the destination station.
3. Tram from the destination train station to the tram stop close to work.
4. Walk from the tram stop to...