I did a similar thing in Python[0]. Probably not as well written and, to be honest, I just made up the address resolution algorithm. I got as far as pinging an

I did a similar thing in Python[0]. Probably not as well written and, to be honest, I just made up the address resolution algorithm. I got as far as pinging an internet host with ICMP. I like that mine is completely contained in a (short) notebook, though (the OP article misses many details that are in the larger source code that is referenced). I hadn't seen this article and did mine all from Wikipedia! There is a huge jump in complexity for TCP, though, and I lost interest a bit. Part 3 of this covers that so maybe one day I'll read that and finish mine. I found it very rewarding and it's definitely something that is doable by any level of programmer if you're interested in networking. [0] https://github.com/georgek/notebooks/blob/master/internet.ipynb https://github.com/georgek/notebooks/blob/master/internet.ip...