Computer networks notes

DNS: How Resolution Works

From a name to an IP by walking the root, TLD, and authoritative servers. Every section is a drawn page beside a clear written explanation, about 9 minutes in all.

  • Chapter 20 of 31
  • About 9 minutes
  • 7 sections
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The first drawn page of DNS: How Resolution Works: The internet’s phone book
The chapter's first page: The internet’s phone book

In this chapter

  • The internet’s phone book
  • A hierarchy of servers
  • The recursive resolver
  • Walking the tree
  • Caching and TTL
  • Recursive vs iterative
  • DNS over UDP and TCP

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DSA comes with the all labs plan and every ChaiCode batch.