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Module II: Browser & Apache Web Server Architecture; Common Protocols

20192m

If a server has no clue about where to find the address for a hostname, then

(i) server asks to the root server
(ii) server asks to its adjacent server
(iii) request is not processed
(iv) None of the above

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Correct Answer: (i) server asks to the root server

Explanation:

  • When a recursive DNS server receives a query for a hostname and has no cached record or zone information for it, it initiates the standard hierarchical lookup process by querying one of the 13 logical Root Name Servers (e.g., a.root-servers.net).
  • The root server points the recursive resolver to the authoritative Top-Level Domain (TLD) server (e.g., .com or .org), which in turn directs it to the domain's authoritative name server.

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