Question 4 of 8
Emma is a systems administrator for WestSim Corporation. The network has multiple domains with DNS and
DHCP services configured in each domain. All servers are running Windows Server 2012 R2 and all clients are
running Windows 8. All hosts are members of the acct.westsim .com domain, the records of which 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 each client that tries 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 names 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?
0 Manually create an A record in the 3.168.192.in-addr.arpa zone for each host.
0 Manually create an A record in the acct.westsim.com zone for each host.
0 Manually create a CNAME record in the acct.westsim.com zone for each host.
0 Manually create a CNAME record in the 3.168.192.in-addr.arpa zone for each host.
ANSWER: Manually create a PTR record in the 3.168.192.in-addr.arpa zone for each host.
0 Manually create a PTR record in the acct.westsim.com zone for each host.
Explanation
In this example, the custom application cannot determine the host name for a given host because of a missing PTR
record in the 3.168.192.in-addr.arpa reverse lookup zone. The application can find these records for other hosts
because the DHCP server automatically creates the record when the IP address is assigned. Each of these hosts has a
manually configured IP address, so the corresponding PTR records are not being created automatically.
Objectives
Objectives for MS 70-41 0:
403 Deploy and configure DNS service
References
LabSim for Windows Server Pro: Install and Configure, Section 5.4.
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