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- Installing and Configuring Windows server 2012 (70-410)
56.
Which of the following resource record types contains the information a DNS server
needs to perform reverse name lookups?
- A.A
- B.CNAME
- C.SOA
- D.PTR
- Answer & Explanation
- Report
Answer : [D]
Explanation :
Explanation :
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A. Incorrect: A resource record contains information for forward name lookups, not
reverse name lookups. B. Incorrect: CNAME resource records contain alias information for A records. They are not used for reverse name lookups. C. Incorrect: SOA records specify that a server is the authoritative source for a zone. They are not used for reverse name lookups. D. Correct: PTR records contain the information needed for the server to perform reverse name lookups. |
57.
Which of the following would be the correct FQDN for a resource record in a reverse
lookup zone if the computer’s IP address is 10.75.143.88?
- A.88.143.75.10.in-addr.arpa
- B.10.75.143.88.in-addr.arpa
- C.in-addr.arpa.88.143.75.10
- D.arpa.in-addr.10.75.143.88
- Answer & Explanation
- Report
Answer : [A]
Explanation :
Explanation :
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A. Correct: To resolve the IP address 10.75.143.88 into a name, a DNS server would
locate a domain called 143.75.10.in-addr.arpa in the usual manner and read the
contents of a resource record named 88 in that domain. B. Incorrect: The least significant bits in the IP address (that is, 88) should come first in the FQDN. C. Incorrect: The top-level domain used for reverse lookups is arpa. Therefore, arpa must be the last and most significant name in a reverse lookup FQDN. D. Incorrect: The top-level domain used for reverse lookups is arpa. Therefore, arpa must be the last and most significant name in a reverse lookup FQDN. |
58.
Which of the following is not one of the elements of DNS?
- A.Resolvers
- B.Relay agents
- C.Name servers
- D.Namespace
- Answer & Explanation
- Report
Answer : [B]
Explanation :
Explanation :
|
A. Incorrect: Resolvers are client programs that generate DNS queries and send them
to a DNS server for fulfillment. B. Correct: Relay agents are router devices that enable DHCP clients to communicate with servers on other networks. C. Incorrect: Name servers are applications running on server computers that maintain information about the domain tree structure. D. Incorrect: DNS consists of a tree-structured namespace in which each branch of the tree identifies a domain. |
59.
In which of the following DNS transactions does the querying system generate a recursive
query?
- A.A DNS client sends the server name www.adatum.com to its designated DNS server for resolution.
- B.A client’s DNS server sends a request to a root domain server to find the authoritative server for the com top-level domain.
- C.A client’s DNS server sends a request to the com top-level domain server to find the authoritative server for the adatum.com domain.
- D.A client’s DNS server sends a request to the adatum.com domain server to find the IP address associated with the server name www.
- Answer & Explanation
- Report
Answer : [A]
Explanation :
Explanation :
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A. Correct: When a client sends a name resolution query to its DNS server, it uses a
recursive request so that the server will take on the responsibility for resolving the
name. B. Incorrect: A DNS server seeking the server for a top-level domain uses iterative, not recursive, queries. C. Incorrect: A DNS server seeking the server for a second-level domain uses iterative, not recursive, queries. D. Incorrect: A DNS server requesting a server name resolution from an authoritative server uses iterative, not recursive, queries. |
60.
Which of the following contains the controls used to modify DNS name caching?
- A.The Forwarders tab of a server’s Properties sheet
- B.The Start of Authority (SOA) tab of a zone’s Properties sheet
- C.The Root Hints tab of a server’s Properties sheet
- D.The New Zone Wizard
- Answer & Explanation
- Report
Answer : [B]
Explanation :
Explanation :
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A. Incorrect: The Forwarders tab is where you specify the addresses of servers that
will have your server’s recursive queries. B. Correct: The Start of Authority (SOA) tab of a zone’s Properties sheet contains the Minimum (Default) TTL setting that controls DNS name caching for the zone. C. Incorrect: The Root Hints tab is where you specify the addresses of the root name servers on the Internet. D. Incorrect: The New Zone Wizard does not enable you to modify name caching settings. |
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