INTRODUCTION
PROTOCOL LAYERING
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It translates between domain names and IP addresses
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It automatically assigns IP addresses to network devices
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It transfers web pages
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It enables file sharing across the network
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Detailed explanation-1: -The Internet’s DNS system works much like a phone book by managing the mapping between names and numbers. DNS servers translate requests for names into IP addresses, controlling which server an end user will reach when they type a domain name into their web browser. These requests are called queries.
Detailed explanation-2: -The correct answer is “option 3". CONCEPT: DNS, which stands for Domain Name System, maps domain name into Internet Protocol (IP) address. Hence, the DNS maps the IP addresses to a hierarchy of domain names.
Detailed explanation-3: -DNS primarily uses the User Datagram Protocol (UDP) on port number 53 to serve requests. DNS queries consist of a single UDP request from the client followed by a single UDP reply from the server. The Transmission Control Protocol (TCP) is used when the response data size exceeds 512 bytes, or for zone transfers.