Free course
Free DNS course
Learn in 33 short lessons how DNS works: from nameservers and A records to SPF, DKIM, DMARC, transferring and DNSSEC. Each lesson includes a quiz and an exercise that's checked against real domains. Free, no account needed.
Lessons
All modules
Each lesson takes 5 to 10 minutes and ends with a quiz and an exercise. Your progress is saved in this browser, and also in My courses if you're signed in.
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1
What is DNS?
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2
Nameservers and zones
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3
Records for your website
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4
Records for email
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5
Other records
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6
Time, cache and transferring
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7
Connecting external services
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8
Security and troubleshooting
My course
On My courses you can see your progress, your assignments, your exam result and your certificate, on any device. You can also delete your certificate, your course or all your data there.
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