https://fablabbcn-projects.gitlab.io/learning/fabacademy-local-docs/material/networking/#raspberry-pi-tutorials

Intro to Communication Protocols

Networking is just copying bits from one place to another
To split processes up into modules is helpful when you want those processes to run in parallel
Modularity avoids interference between processes
Analogy to human speech: language is the protocol layer, the microphone is the physical layer

Protocols, Connectors, Media

Connectors can be used with different protocols, so an ethernet connector can also be used for serial communication etc.
Often protocols are nested inside each other, such as WiFi: It has many layers, with the outer layer being the WPA2 encryption
Information can be transmitted via different media, such as cable, optic, radio frequency

Network Topology

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A bus topology is very common for wired communication
With radio communication, a mesh topology is more common. This can help with relaying messages, such as a node relying a message to another recipient
The network topology is what determines, how a punctual failure impacts the network (such as a single point-of-failure)
Errors always happen, always relative to the speed and distance. This is why most protocols have error correction built in

<aside> 🤖 This is why when flashing a microcontroller via serial, take down the speed when transmitting in order to reduce the chance for errors

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Wired Communication