How DNS actually works
Nothing in DNS propagates. A name is resolved by walking down from the root, and every answer is a cached copy with an expiry date you set yourself.
Articles
Concepts, decoded
3 articles that explain one thing properly, without assuming you already know it.
Topic
Level
How SSL actually works
SSL is now TLS, and encryption is the smaller half of the job. What the handshake really does, what a certificate proves, and how teams break it in production.
What a CDN actually does
A CDN is not magic and it is not only caching. The mental model, the request lifecycle, the headers that control it, and the four ways teams break it.
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