Evan as a 20+ year network engineer, I don't think I've run across an article about networking that balances depth and breadth so well. All of the information presented is high-level enough to retain (at least as a big picture), but detailed enough to avoid hand-wavy 'magic networks' descriptions.

Bravo - well done.

Edit - Also worth adding that this article is a rarity in that the details are actually accurate! Even things I read in networking books and trades often have egregious errors - usually due to the breadth of the topic matter.