Beginner · Lessons: 4
DNS: the internet’s address book
How names become addresses, who sees your lookups, and how encrypted DNS changes that.
- 1 What DNS does
Why computers need a name-to-number lookup for every website you visit, and who actually answers that lookup.
6 min - 2 Who sees your DNS lookups
A plain DNS lookup travels unencrypted. Here is exactly who is positioned to read it, and why that matters even on an HTTPS site.
6 min - 3 Encrypted DNS: DoH and DoT
Two standards wrap DNS lookups in encryption. What that actually hides, what it still does not, and how macOS supports it.
7 min - 4 DNS in attacks and defence
The same lookup that gets you to a website is also used to fool you into the wrong one, to block sites, and, occasionally, to smuggle data out. What to watch for.
7 min
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