About Course
Understand the Domain Name System – the internet’s address book. Learn how domain names are structured and registered, how a name is resolved to an IP address, what the common record types (A, AAAA, CNAME, MX, TXT, NS) do, how TTL and caching affect changes, and how DNS is used to protect organisations.
Tutwoo is an independent learning provider. This course is general awareness training written from published official guidance. It does not replace training required for your specific job, and it is not an accredited qualification.
© 2026 Tutwoo UK Limited. This course was created in-house by Tutwoo and is our original work. It is for your own learning only: please do not copy, share, record or resell it.
Course Content
Course Lessons
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Domain names and registration
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How a DNS lookup works
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Common DNS record types
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DNS and security
Sources & Further Reading
Final Assessment
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