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

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

(a) server asks to the root server

(b) server asks to its adjcent server

(c) request is not processed

(d) none of the mentioned

I had been asked this question during an online interview.

My query is from DNS topic in chapter Application Layer of Computer Network

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Correct option is (a) server asks to the root server

Easy explanation: Root name servers are actually very important and critical as they are the first step in translating human readable hostnames into IP addresses for carrying out communication.

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