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Test Bank, Lesson 9 Configuring DNS Records Multiple Choice 1) What is another designation for an Alias? a

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Test Bank, Lesson 9 Configuring DNS Records

Multiple Choice

1) What is another designation for an Alias?

a. A host or A record

b. canonical name or CNAME

c. pointer or PTR record

d. Name Server or NS record

 

2. A Start of Authority record specifies what kind of information about a zone?

a. a list of hosts or A names

b. a list of canonical (CNAME) records

c. the zone serial number

d. a reverse lookup record

 

 

3. 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?

a. an A record

b. a CNAME record

c. a PTR record

d. an NS record

4. Before creating PTR records, what DNS objects must you create?

a. reverse lookup zones

b. CNAME records

c. SOA records

d. NS records

 

5. What does Time to Live (TTL) mean in DNS parlance?

a. the length of time it takes a DNS query to process

b. the length of time required to process an iterative query

c. the length of time between zone updates

d. the length of time a record remains in DNS cache

 

 

6. Round-robin DNS is a term that refers to what kind of distribution mechanism for DNS responses to queries?

a. limited time to live

b. balanced

c. cached

d. priority weighted

 

7. Which command do you use to verify local DNS settings?

a. nslookup <dns_servername>

b. ipconfig /all

c. ping localhost

d. tracert <dns_servername>

 

 

8. What does issuing the nslookup command with no parameters do on your system?

a. It returns an error: Missing parameter.

b. It places you into nslookup’s interactive mode.

c. It returns you to a prompt with no result.

d. It displays your DNS query cache.

 

 

9. Which DNS record contains the serial number for the zone?

a. NS record

b. A record

c. PTR record

d. SOA record

 

 

10. Which of the following is an example of an SRV record?

a. DNS server

b. AD server

c. mail server

d. web server

 

11. You can use the dnscmd command to create zones. What other tasks can you perform with it?

a. delete resource records

b. start/stop the DNS service

c. perform name service queries

d. install DNS services

 

 

12. If an A record maps a host name to an IP address, what does an AAAA record do?

a. maps multiple hosts to a single IP address

b. maps multiple services to a single IP address

c. maps a host name to a single IPv6 address

d. provides round-robin DNS services to multiple hosts

 

13. Which one of the following is correct for querying a PTR record?

a. nslookup Microsoft.com

b. nslookup www.technet.com

c. nslookup server1

d. nslookup 192.168.1.50

 

14. How can you force a system to update its DNS record?

a. Change IP addresses.

b. Disable/enable the NIC.

c. Execute ipconfig /flushdns.

d. Execute ipconfig /registerdns.

 

15. 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?

a. The CNAME record is incorrect.

b. The PTR record doesn’t exist.

c. The A record doesn’t exist.

d. The SOA for the zone is malformed.

 

Short Answer

 

16. How do you specify a DNS server other than your default one(s) to query a hostname or IP address?

 

17. List the two settings that DNS scavenging depends on.

 

18. Zone scavenging is disabled by default. What two things must you do to enable it?

 

19. Explain DNS aging and scavenging.

 

20. What is meant by the term stale record?

 

21. Why is enabling secure dynamic updates a good idea?

 

Best Answer

 

22. 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?

a. Reboot.

b. Disable/enable the NIC.

c. Clear the DNS cache on the DNS server.

d. Execute ipconfig /flushdns.

 

23. What is the primary advantage to enabling round-robin DNS?

a. load balancing

b. speed

c. efficiency

d. fault tolerance

 

24. What is the purpose of a priority number in MX records?

a. to set delivery priority

b. to designate primary, secondary, and so forth, mail servers

c. for fault tolerance

d. for mail-routing preference.

 

 

Build List

 

25. Order the following steps required to create a Host record.

a. Right-click the zone that you want to create a Host resource record for and select New Host (A or AAAA).

b. If you want to also create a PTR record, select the Create associated pointer (PTR) record option.

c. Expand the server to display the Forward Lookup Zones and Reverse Lookup Zones folders.

d. In the IP address text box, type the IP address (IPv4 or IPv6).

e. Choose Server Manager > Tools > DNS.

f. In the Name text box, type the name of the host.

g. Expand the DNS Console.

 

26. Order the following steps required to modify the TTL value for a resource record.

a. Expand the server to display the Forward Lookup Zones and Reverse Lookup Zones folders.

b. To view additional options, click View > Advanced.

c. Choose Server Manager > Tools > DNS.

d. To modify a record, double-click a resource record. The Properties dialog box opens.

e. Type the TTL using the DDDDD:HH.MM.SS format, where DDDDD is days, HH is hours, MM is minutes, and SS is seconds.

f. Expand the DNS Console.

 

27. Order the following steps required to enable aging and scavenging.

a. Modify the no-refresh interval and refresh interval as needed.

b. If you want the aging/scavenging settings to apply to all existing Active Directory–integrated zones, select the Apply these settings to the existing Active Directory-integrated zones option.

c. Choose Server Manager > Tools > DNS.

d. Click the Scavenge stale resource records option.

e. Right-click the DNS server and click Set Aging/Scavenging for all Zones.

 

Repeated Answer

 

28. 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.

a. identifies an alias for a host name

b. identifies a DNS server that is authoritative for a zone

c. maps a domain/host name to an IP address

d. resolves host names from IP addresses

 

29. 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.

a. identifies an alias for a host name

b. identifies a DNS server that is authoritative for a zone

c. maps a domain/host name to an IP address

d. resolves host names from IP addresses

 

30. 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.

a. identifies an alias for a host name

b. identifies a DNS server that is authoritative for a zone

c. maps a domain/host name to an IP address

d. resolves host names from IP addresses

 

31. DNS servers contain several different types of resource records with which you need to become familiar. Select the correct definition for Pointer (PTR) records.

a. identifies an alias for a host name

b. identifies a DNS server that is authoritative for a zone

c. maps a domain/host name to an IP address

d. resolves host names from IP addresses