Domain Name Service - Quiz

1.	What is the purpose of the top-level subdomains? Please select the best answer.
	A.	To convert domain names into IP addresses
	B.	To contain all hosts belonging to organizations of particular types
	C.	To distribute information among many different machines on the Internet
	D.	To provide the Fully Qualified Domain Name (FQDN) of a DNS entity

2.	What is a name server? Please select the best answer.
	A.	A branch of the DNS namespace under the administrative control of some entity
	B.	The primary server which has the official or authoritative information on its zone
	C.	A process that accepts queries into the DNS database, or the computer on which this process runs
	D.	A secondary server providing an alternative source for information on the zone

3.	What distinguishes a primary server? Please select the best answer.
	A.	DNS data for a primary server’s zone is stored on the server host’s local disk in zone files.
	B.	A primary server allows for load distribution and provides backup service.
	C.	Only 12 primary servers exist and they are maintained by the InterNIC.
	D.	Primary servers obtain their data from the authoritative server by periodically downloading copies of the zone files.

4.	What is the purpose of the Canonical Name (CNAME) Resource Record type? Please select the best answer.
	A.	To set basic parameters for a zone and establish responsible parties
	B.	To declare a name server for a zone
	C.	To specify an address-to-name mapping
	D.	To define an alias for a host

5.	What is the purpose of the Pointer (PTR) Resource Record type? Please select the best answer.
	A.	To set basic parameters for a zone and establish responsible parties
	B.	To declare a name server for the zone
	C.	To specify an address-to-name mapping
	D.	To define an alias for a host

6.	What is the purpose of the Host Information (HINFO) Resource Record type? Please select the best answer.
	A.	To specify an address-to-host name mapping
	B.	To define an alias for a host
	C.	To give the operating system and architecture for the specified host
	D.	To declare a machine to be a name server for a specified zone

7.	What role do root servers play? Please select the best answer.
	A.	They provide alternative sources for information on a zone.
	B.	They bind together the DNS database through recursion.
	C.	They accept queries into the DNS database.
	D.	They contain the official or authoritative information for a zone.

8.	Through what process is the distributed DNS database bound together? Please select the best answer.
	A.	Recursion
	B.	Reverse lookup
	C.	Subnetting
	D.	System calls

Correct answers:

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