Server 4-11 Chapter 9

25 July 2022
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21 test answers

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question
Which DNS record contains the serial number for the zone?
answer
SOA record
question
Before creating PTR records, what DNS objects must you create?
answer
reverse lookup zones
question
A Start of Authority record specifies what kind of information about a zone?
answer
the zone serial number
question
You can use the dnscmd command to create zones. What other tasks can you perform with it?
answer
delete resource records
question
If an A record maps a host name to an IP address, what does an AAAA record do?
answer
maps a host name to a single IPv6 address
question
If you have a server named server1.blah.com, want to use it as your web server, and have requests point to www.blah.com, what kind of DNS record would you create?
answer
a CNAME record
question
Which of the following is an example of an SRV record?
answer
AD server
question
Which one of the following is correct for querying a PTR record?
answer
nslookup 192.168.1.50
question
What does Time to Live (TTL) mean in DNS parlance?
answer
the length of time a record remains in DNS cache
question
What is another designation for an Alias?
answer
canonical name or CNAME
question
How can you force a system to update its DNS record?
answer
Execute ipconfig /registerdns.
question
If you issue the command nslookup 192.168.1.50 and get no response, but then issue nslookup server1 and receive 192.168.1.50 as a response, what do you know is wrong?
answer
The PTR record doesn't exist.
question
There are two settings that DNS scavenging depends on. One is the refresh internal. Which of the following is the other?
answer
no-refresh interval
question
If you have corrected a DNS server problem, such as renamed a system or changed its IP address, but your local system still attempts to connect to the old system, what can you do to obtain the new information from the DNS server quickly?
answer
Execute ipconfig /flushdns.
question
What is the primary advantage to enabling round-robin DNS?
answer
load balancing
question
What is the purpose of a priority number in MX records?
answer
for fault tolerance
question
DNS servers contain several different types of resource records with which you need to become familiar. Select the correct definition for Host (A and AAAA) records.
answer
maps a domain/host name to an IP address
question
DNS servers contain several different types of resource records with which you need to become familiar. Select the correct definition for Name Server (NS) records.
answer
identifies a DNS server that is authoritative for a zone
question
DNS servers contain several different types of resource records with which you need to become familiar. Select the correct definition for Canonical Name (CNAME) records.
answer
identifies an alias for a host name
question
DNS servers contain several different types of resource records with which you need to become familiar. Select the correct definition for Pointer (PTR) records.
answer
resolves host names from IP addresses
question
What does issuing the nslookup command with no parameters do on your system?
answer
It places you into nslookup's interactive mode.