After identifying some of the challenges every network solution must address (part 1, part 2, part 3) we tried to tackle an interesting question: “how do you implement this whole spaghetti mess in a somewhat-reliable and structured way?”

The Roman Empire had an answer more than 2000 years ago: divide-and-conquer (aka “eating the elephant one bite at a time”). These days, we call it layering and abstractions.

In the Need for Network Layers video, I listed all the challenges we have to address and then described how you could group them in meaningful modules (called networking layers).