DNS Lookup Explained

Short summary

A beginner-friendly walkthrough of how DNS lookup works, tracing a request from browser cache through OS cache, recursive resolver, root server, TLD server, and authoritative name server. It explains caching, TTL, and common DNS record types using simple analogies like a phonebook. The content is a solid introductory explainer but lacks depth for practitioners.

• •DNS resolution follows a 7-step chain from browser cache to authoritative server
• •Caching at multiple layers makes repeat lookups nearly instant; TTL controls cache expiry
• •Common record types include A, CNAME, and others beyond simple IP mapping

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