DNS - Computer Networks Questions and Answers

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1.

The entire hostname has a maximum of

   A.) 255 characters
   B.) 127 characters
   C.) 63 characters
   D.) 31 characters

Answer: Option 'A'

255 characters

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2.

Which one of the following is not true?

   A.) multiple hostnames may correspond to a single IP address
   B.) a single hostname may correspond to many IP addresses
   C.) a single hostname may correspond to a single IP address
   D.) none of these

Answer: Option 'C'

a single hostname may correspond to a single IP address

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3.

A DNS client is called

   A.) DNS updater
   B.) DNS handler
   C.) DNS resolver
   D.) none of these

Answer: Option 'C'

DNS resolver

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4.

The domain name system is maintained by

   A.) distributed database system
   B.) a single server
   C.) a single computer
   D.) none of these

Answer: Option 'A'

distributed database system

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5.

Servers handle requests for other domains

   A.) directly
   B.) by contacting remote DNS server
   C.) it is not possible
   D.) none of these

Answer: Option 'B'

by contacting remote DNS server

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6.

The right to use a domain name is delegated by domain name registers which are accredited by

   A.) internet architecture board
   B.) internet society
   C.) internet research task force
   D.) internet corporation for assigned names and numbers

Answer: Option 'D'

internet corporation for assigned names and numbers

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7.

DNS database contains

   A.) name server records
   B.) hostname-to-address records
   C.) hostname aliases
   D.) all of these

Answer: Option 'D'

all of these

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8.

Wildcard domain names start with label

   A.) @
   B.) *
   C.) &
   D.) #

Answer: Option 'B'

*

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9.

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 these

Answer: Option 'A'

server asks to the root server

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10.

Which one of the following allows client to update their DNS entry as their IP address change?

   A.) mail transfer agent
   B.) dynamic DNS
   C.) authoritative name server
   D.) none of these

Answer: Option 'B'

dynamic DNS

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