Dns multiple choice questions and answers

20 Question DNS Quiz Multiple Choice

Question 1

http://csuglobal.blackboard.com/bbcswebdav/courses/KEY_ITS405/images/ITS405_MeMod04_Q09.jpg Refer to the graphic above to answer the following question. You are the administrator of the westsim.private domain. The data for the westsim.private zone is stored in Active Directory. You have just opened a branch office in Phoenix. The branch office is connected to the main offices with a slow WAN link. The WAN link is unreliable and is sometimes down for 3 days at a time. You plan on replacing the connection in the future, but for now the link will have to be used. You configure a secondary zone for westsim.private at the Phoenix location accepting the default configuration. The SOA record for the zone is shown in the graphic above. What change should you make to prevent name resolution problems at the Phoenix location?

Answer

Increase the Refresh interval to 3 days.

Decrease the Refresh interval value to 10 minutes.

Increase the Expires after value to 4 days.

Increase the Retry interval to 1 day.

1 points

Question 2

You are the network manager for the westsim.private domain. You are in the process of transitioning from IPv4 to IPv6 on your internal network. You want to configure DNS to provide hostname-to-IPv6 address and IPv6 address-to-hostname resolution for a specific IPv6-only host. Which record types would you create? (Select two.)

Answer

SRV

AAAA

A

CNAME

NS

PTR

1 points

Question 3

You are the network administrator for your company's network. Your network consists of 8 Windows 2008 Server computers, 500 Windows XP Professional computers, and 5 UNIX servers. One of your Windows 2008 Server computers is your DNS server. The DNS zone is configured as an Active Directory-integrated zone. The DNS zone is also configured to allow dynamic updates. Users report that although they can access the Windows XP computers by host name, but they cannot access the UNIX servers by host name. What should you do?

Answer

Manually enter A (host) records for the UNIX servers in the zone database.

On the DNS server, manually create a HOSTS file that contains the records for the UNIX servers.

Configure a UNIX computer to be a DNS server in a secondary zone.

Manually add the UNIX servers to the Windows domain.

1 points

Question 4

You are configuring the network for a new company with two sites: the main office is in Denver, and a branch office is in Phoenix. The sites are connected by a WAN link. All servers, including domain controllers, will run Windows Server 2008. All servers will be members of an Active Directory domain. The main office uses the domain of corp.westsim.com. All domain members are currently located only in the Denver location. The branch office uses the domain of research.corp.westsim.com. All domain members are located only in the Phoenix location. The following servers are in each location (Location, Server, Role): Denver, srv1.corp.westsim.com, Domain controller DNS server Denver, srv2.corp.westsim.com, Domain controller DNS server Denver, srv3.corp.westsim.com, Domain controller Phoenix, srv1.research.corp.westsim.com, Domain controller DNS server Phoenix, srv2.research.corp.westsim.com, Domain controller DNS server Phoenix, srv3.research.corp.westsim.com, Domain controller All zones are Active Directory integrated zones, and there are no other DNS servers on the network. To improve name resolution at the Phoenix location, you install a domain controller and DNS server named srv4.corp.westsim.com in the Phoenix location. You want this server to have a copy of the corp.westsim.com zone but not the research.corp.westsim.com zone. You do not want any servers in the Denver location to have a copy of the research.corp.westsim.com zone. You want to minimize DNS replication traffic where possible. What should you do? (Choose two. Each correct choice is part of the solution.)

Answer

Disable zone transfers on both zones.

Configure the replication scope for corp.westsim.com as To all DNS servers in this domain. Configure the replication scope for research.corp.westsim.com as To all DNS servers in this forest.

Configure the replication scope for both zones as To all DNS servers in this domain.

Configure the replication scope for both zones as To all DNS servers in this forest.

Configure the replication scope for corp.westsim.com as To all DNS servers in this forest. Configure the replication scope for research.corp.westsim.com as To all DNS servers in this domain.

Allow zone transfer to listed name servers for both zones.

1 points

Question 5

You are the administrator for the Seattle office of WestSim Corporation. Zone information for the entire westsim.com domain is stored in a primary zone on the portland.westsim.com server located in the Portland office. There is a T1 line between the Seattle and Portland offices, but the line is often saturated with heavy network traffic, which makes name resolution for those in the Seattle office very slow. What can you do to improve DNS performance for computers in the Seattle office?

Answer

Install a DNS server in the Seattle location. Configure it with an Active Directory integrated zone of the westsim.com domain.

Install a DNS server in the Seattle location. Configure it with a primary zone of the westsim.com domain.

On the portland.westsim.com computer, create a new zone called seattle.westsim.com. Make it a primary zone, and configure it to use incremental updates.

Install a DNS server in the Seattle location. Configure it with a secondary zone of the westsim.com domain.

1 points

Question 6

You are a network engineer for a large private network. The network has a corporate headquarters site, six regional sites, and dozens of branch sites per region. The network's private namespace consists of a single DNS domain that is a subdomain of a registered public DNS domain. To provide DNS name resolution fault tolerance and performance, each site has its own DNS server. All DNS servers run Windows 2008 DNS. The DNS server in the corporate headquarters site is a primary DNS server. All other DNS servers are secondary DNS servers for the private namespace. The primary DNS server for the private network is overwhelmed with zone transfer requests. You must redesign the network's DNS structure to alleviate this problem. What should you do?

Answer

Configure DNS servers in branch sites to receive zone transfers from a DNS server in a regional site.

Install another primary DNS server in the corporate headquarters site. Configure half the DNS servers to receive zone transfers from the new primary DNS server.

Change all DNS servers in regional sites to be primary DNS servers.

Configure the DNS zone for the private network to be an Active Directory integrated zone.

1 points

Question 7

You have a Windows Server 2008 server that has Windows Server core installed. You would like to add the DNS server role to this server. What should you do?

Answer

At a command prompt, run dnscmd.

At a command prompt, run oclist.

Insert the Windows Server 2008 DVD. At a command prompt, run setup.exe.

At a command prompt, run dnslint.

At a command prompt, run ocsetup.

1 points

Question 8

You are the administrator for the Creative Designs company. The network uses a single domain named cdesign.com. A single domain controller (CDDC1) holds an Active Directory integrated zone and provides DNS services. Recently, your company purchased a competitor company, Design Limited, Inc. Their network uses a single domain, named dlimitinc.com, with a single domain controller (DLIDC1) holding an Active Directory integrated zone. Domains for each company are currently in different forests. You connect the Creative Designs location to the Design Limited location with a T-1 line. You want to enable hosts at the Creative Designs location to be able to resolve host names for hosts in the dlimitinc.com zone. You need to minimize hardware costs while maximizing DNS performance. How should you configure the CDDC1 server at the Creative Designs location to enable clients to resolve names at Design Limited, Inc.?

Answer

Configure the IP address for DLIDC1 as a forwarder for CDDC1.

Create a primary zone of the dlimitinc.com zone on CDDC1.

Create an Active Directory integrated zone of the dlimitinc.com zone on CDDC1.

Create a secondary zone of the dlimitinc.com zone on CDDC1.

1 points

Question 9

Emma is a systems administrator for WestSim Corporation. The network has multiple domains with DNS, WINS, and DHCP services configured in each domain. All servers are running Windows 2008, and all clients are running Windows Vista. All hosts are members of the acct.westsim.com domain whose records are stored in a primary zone. As part of a new security initiative, the IT department has developed a custom application that reports the host name of all clients that try to access three sensitive servers in the Accounting department. Emma has been asked to test the new application. During a random test, she finds that the program is not reporting the host names for some clients, even though it properly records their IP addresses. Emma realizes that the custom application submits reverse lookup requests to the DNS server to discover the host name for the specified IP address. She also realizes that the clients whose host name could not be notified have manually configured static IP addresses on subnet 192.168.3.0 using a default subnet mask. What should Emma do?

Answer

Manually create a PTR record in the acct.westsim.com zone for each host.

Manually create a PTR record in the 3.168.192.in-addr.arpa zone for each host.

Manually create a CNAME record in the 3.168.192.in-addr.arpa zone for each host.

Manually create an A record in the 3.168.192.in-addr.arpa zone for each host.

Manually create a CNAME record in the acct.westsim.com zone for each host.

Manually create an A record in the acct.westsim.com zone for each host.

1 points

Question 10

Mary administers a network with ten Windows 2008 servers and four UNIX servers. All servers have been manually assigned a static IP address. A single domain is used on the network. DC1 is a domain controller that holds an Active Directory-integrated zone for the entire network and provides DNS services for all hosts. DC2 provides DHCP services for network clients. Users report that they are unable to contact the UNIX servers by name. What should Mary do?

Answer

Configure a HOSTS file with the name and IP address for each UNIX server. Copy the file to all network clients.

Manually create a CNAME record in the DNS database for each UNIX server.

Manually create an A record in the DNS database for each UNIX server.

Manually create a PTR record in the DNS database for each UNIX server.

Configure DC2 to update DNS records for the UNIX servers.

1 points

Question 11

You are the administrator of the corp.westsim.com domain. All servers in the domain run Windows Server 2008, and all clients run Windows XP Professional. The domain has two subdomains: acct.corp.westsim.com and sales.corp.westsim.com. To improve name resolution, you set up DNS on the srv3.acct.corp.westsim.com server. You create a secondary zone on that server pointing to the sales.corp.westsim.com zone. One day, users complain that name resolution through the Srv3 server isn't working correctly. You suspect that the zone database is corrupt and want to do a zone transfer of all data from the master zone. What should you do?

Answer

At the command line, run Dnscmd /ZoneReload.

In the DNS console, right-click the zone and choose Reload.

At the command line, run Dnscmd /ZoneRefresh.

In the DNS console, right-click the zone and choose Reload from Master.

In the DNS console, right-click the zone and choose Transfer from Master.

1 points

Question 12

You manage a network with two locations: the main office is in Phoenix, and a branch office is in Tulsa. Srv1 is a DNS server in Phoenix and holds the primary zone for the eastsim.local zone. To improve name resolution requests in the branch office, you place a secondary copy of the zone on Srv5 in the Tulsa location. Due to recent expansion, you are adding more servers to the Phoenix location. For each server, you manually create the A and PTR records. You find that after you add the server, computers in the Tulsa location are unable to contact the new servers for up to 10 minutes. You want to make sure that hosts in Tulsa can contact these servers using DNS as quickly as possible. What should you do?

Answer

Increment the zone serial number on Srv1 each time you make a change.

Enable DNS Notify on the zone on Srv1.

Decrease the refresh interval in the SOA record for the zone.

Configure the zone to use incremental zone transfers (IXFR).

1 points

Question 13

You are a network engineer for a new company. The company previously installed a DNS server to manage the company's public namespace. The DNS server runs BIND version 8.2. To provide fault tolerance, you install a second DNS server on a Windows Server 2008 computer. You reconfigure the zone types so the Windows 2008 DNS server has the primary zone and the BIND DNS server has a secondary zone. The BIND DNS server has an IP address of 45.25.0.1 and the Windows 2008 DNS server has an IP address of 45.25.0.2. As part of your security plan you must prevent zone data from being transferred to rogue DNS servers that might seek zone transfers from either of the company's public DNS servers. You must also prevent eavesdropping of any DNS data replicated between DNS servers. What should you do? (Choose two. Each correct choice is part of the solution.)

Answer

On the Windows Server 2008 DNS server, integrate the zone into Active Directory.

Create an IPSec tunnel between the company's two public DNS servers.

On the Windows Server 2008 DNS server, disallow all zone transfers.

On the Windows Server 2008 DNS server, enable secure dynamic updates for the zone.

On the Windows Server 2008 DNS server, restrict zone transfers to the IP address 45.25.0.1.

On the BIND DNS server, restrict zone transfers to the IP address 45.25.0.2.

1 points

Question 14

You are a systems administrator for WestSim Corporation. The network has multiple domains with DNS, WINS, and DHCP services configured in each domain. All servers are running Windows 2008, and all clients are running Windows XP Professional. DHCP, DNS, and client computers are configured for dynamic DNS updates. As part of a new security initiative, the IT department has developed a custom application that reports the host name of all clients that try to access three sensitive servers in the Accounting department. The application has been working fine for the last three months. The company expands and adds a new building with a LAN connection to the rest of the network. This building has its own subnet, 192.168.5.0. You create a scope on an existing DHCP server for this subnet. During a random check of the reporting software, you discover that the application reports only the IP address but not the host name for clients on the new subnet. Everything works as designed for hosts on other subnets. You check the DNS database and find that none of the hosts on that subnet has an associated PTR record. What should you do?

Answer

Add a HOSTS file to the server running the reporting software.

Manually create CNAME records for each host on the subnet.

Create a secondary reverse lookup zone for subnet 192.168.5.0.

Manually create PTR records for each host on the subnet.

Create a primary reverse lookup zone for subnet 192.168.5.0.

1 points

Question 15

You need to create a DNS record that identifies a service, protocol, and port number. Which record type would you create?

Answer

MX

CNAME

SRV

A

PTR

1 points

Question 16

You are the manager for the westsim.com domain. All computers are members of the westsim.com domain. A single Windows Server 2008 server is the domain controller and DNS server for the domain. You have recently installed a new server, srv12, with IP address 192.168.3.199/24. You need to manually create a record in the DNS database that provides IP address-to-hostname resolution. Which command would you use?

Answer

dnscmd /recordadd westsim.com 192.168.3.199 A srv12

dnscmd /recordadd 3.168.192.in-addr.arpa 199 PTR srv12.westsim.com

dnscmd /recordadd westsim.com srv12 A 192.168.3.199

dnscmd /recordadd 192.168.3.in-addr.arpa 199 PTR srv12.westsim.com

1 points

Question 17

You are the systems administrator for EastSim Corporation. Domain controllers at headquarters host Active Directory integrated zones for the domain eastsim.com domain. The company has recently purchased a small design company located in Tampa. The new company will become a branch office connected to headquarters with a T-1 line. You have been sent to integrate the branch office into the corporate network. The existing network in Tampa is using a UNIX BIND-based DNS server. Rather than replace this server, you decide to use it to provide name resolution for the branch office. You want all clients in the branch office to be able to resolve hostnames for hosts in the eastsim.com domain. You want to minimize network traffic across the WAN link and provide the fastest name resolution services possible. What should you do?

Answer

On one of the DNS servers at headquarters, change the zone type for eastsim.com to a primary zone. Change the zone type for all other DNS servers to secondary zones. Create a secondary zone on the UNIX DNS server. Have it replicate data from one of the DNS servers at headquarters.

On one of the DNS servers at headquarters, change the zone type for eastsim.com to a primary zone. Change the zone type for all other DNS servers to secondary zones. Create a secondary zone on the UNIX DNS server. Have it replicate data from one of the primary zone at headquarters.

Create a secondary zone on the UNIX DNS server. Have it replicate data from one of the domain controllers configured as a DNS server.

Create a primary zone on the UNIX DNS server. Have it replicate data from one of the domain controllers configured as a DNS server.

Configure the UNIX server as a caching-only server. Have it forward name requests to a DNS server at headquarters.

1 points

Question 18

You manage the intranet servers for EastSim Corporation. The company network has three domains: eastsim.com, asiapac.eastsim.com, and emea.eastsim.com. The main company Web site runs on the web1.eastsim.com server with a public IP address of 101.12.155.99. A host record for the server already exists in the eastsim.com zone. You want Internet users to be able to use the URL http://eastsim.com to reach the Web site. What should you do?

Answer

In the eastsim.com domain, add an NS record for the web1.eastsim.com server.

In the eastsim.com domain, edit the SOA record and enter web1.eastsim.com as the primary server.

In the eastsim.com domain, create a CNAME record with a blank name pointing to server web1.eastsim.com.

In the eastsim.com domain, create an SRV record for the _http protocol pointing to server web1.eastsim.com.

In the eastsim.com domain, create a DNAME record pointing to server web1.eastsim.com.

1 points

Question 19

You are a network engineer for your company. Your private network uses the namespace private.westsim.com. All servers run Windows Server 2008. All client computers run Windows XP Professional. You manage the DNS servers that are authoritative for the private.westsim.com zone. Two servers are authoritative for the zone: DNS1 hosts the primary DNS zone, and DNS2 holds a secondary copy of the zone. You use the DNS console to manually create an A resource record for a new Web server on your network that is configured with a static IP address. From your workstation, you open a browser and try to connect to the new Web server. You get an error message stating that the Web site is not found. You try the test from another workstation with success. You return to your workstation only to find it still does not work. You run ipconfig /all and find that your workstation is configured to use the DNS2 server as its preferred DNS server. You want to be able to resolve the host name on your computer as soon as possible to verify that it is working correctly. What should you do?

Answer

On DNS1, right-click the zone and choose Reload.

On your computer, run ipconfig /flushdns.

On DNS1, edit the zone properties and add DNS2 as a listed name server.

On DNS2, right-click the zone and select Reload from Master.

On DNS1, edit the zone properties and decrease the refresh interval.

1 points

Question 20

You manage the intranet servers for EastSim Corporation. The company network has three domains: eastsim.com, asiapac.eastsim.com, and emea.eastsim.com. The main company Web site runs on the web1.eastsim.com server with a public IP address of 101.12.155.99. A host record for the server already exists in the eastsim.com zone. You want Internet users to be able to use the URL http://www.eastsim.com to reach the Web site. What type of DNS record should you create?

Answer

A

SRV

NS

SOA

PTR

CNAME

Question 1

Refer to the graphic above to answer the following question.

You are the administrator of th

e westsim.private domain. The data for the westsim.private zone is stored in Active

Directory. You have just opened a branch office in Phoenix. The branch office is connected to the main offices with a

slow WAN link. The WAN link is unreliable and is somet

imes down for 3 days at a time. You plan on replacing the

connection in the future, but for now the link will have to be used.

You configure a secondary zone for westsim.private at the Phoenix location accepting the default configuration. The SOA

record f

or the zone is shown in the graphic above. What change should you make to prevent name resolution problems

at the Phoenix location?

Answer

Increase the Refresh interval to 3 days.

Decrease the Refresh interval value to 10 minutes.

Increase the Expires after value to 4 days.

Increase the Retry interval to 1 day.

1 points

Question 2

Question 1

Refer to the graphic above to answer the following question.

You are the administrator of the westsim.private domain. The data for the westsim.private zone is stored in Active

Directory. You have just opened a branch office in Phoenix. The branch office is connected to the main offices with a

slow WAN link. The WAN link is unreliable and is sometimes down for 3 days at a time. You plan on replacing the

connection in the future, but for now the link will have to be used.

You configure a secondary zone for westsim.private at the Phoenix location accepting the default configuration. The SOA

record for the zone is shown in the graphic above. What change should you make to prevent name resolution problems

at the Phoenix location?

Answer

Increase the Refresh interval to 3 days.

Decrease the Refresh interval value to 10 minutes.

Increase the Expires after value to 4 days.

Increase the Retry interval to 1 day.

1 points

Question 2