46.
Which of the following statements is not true about DNS lookups?
- A.Every host should be configured with at least 2 DNS name servers.
- B.If the requested data was not found locally on the DNS name server, a name server of the root domain is contacted.
- C.After retrieving information from another DNS server, the DNS server stores the requested information in its cache.
- D.Information in the cache of a DNS server expires once the TTL is reached.
- Answer & Explanation
- Report
Answer : [A]
Explanation :
Explanation :
47.
Which of the following is not a default part of a resource record?
- A.Type
- B.Type
- C.Nameserver
- D.TTL
- Answer & Explanation
- Report
Answer : [C]
Explanation :
Explanation :
| Resource records are not bound to a specific DNS name server. |
48.
Which resource record is used to look up the hostname for a specific IPv4
address?
- A.A
- B.PTR
- C.AA
- D.AAAA
- Answer & Explanation
- Report
Answer : [B]
Explanation :
Explanation :
| The PTR (pointer) resource record is used to match an IP address to a host name. PTR resource records can be used for IPv4 and IPv6. |
49.
Which of the following is not a package that can be used on RHEL 7 as a
caching name server?
- A.unbound
- B.bind
- C.unreal
- D.dnsmasq
- Answer & Explanation
- Report
Answer : [C]
Explanation :
Explanation :
| Unreal is a game, not a DNS caching-name server. |
50.
Which command enables you to check for errors in the unbound configuration
file?
- A.checkconf
- B.unbound-checkconf
- C.testparm
- D.unbound-testparm
- Answer & Explanation
- Report
Answer : [B]
Explanation :
Explanation :
| The unbound-checkconf command enables you to check for errors in the unbound configuration file. |
|
|
||||||||||||||||||||||||||||
