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QUESTION 1:
You work as the network administrator at Certkiller .com. The Certkiller .com
network consists of a single Active Directory domain named Certkiller .com. All
servers on the Certkiller .com network run Windows Server 2003 and all client
computers run Windows XP Professional.
A Windows Server 2003 computer named Certkiller -DC01 is configured as a DNS
server and hosts the root zone of the Certkiller .com network. To enable users to
connect to the Internet, Certkiller .com obtains a T1 line. The company also obtains a
new domain named new. Certkiller .com. You create a new Active Directory-integrated
DNS zone named new. Certkiller .com on Certkiller -DC01.
You receive instruction to ensure that all nodes on the network use the
new. Certkiller .com domain name. You also want your DNS infrastructure to be able
to forward queries to Internet DNS zones.

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What should you do?
A. Delete the root zone.
B. Ensure that recursion is disabled
C. Configure the new zone to be a standard primary DNS zone, and not an Active
Directory-integrated zone.
D. Ensure that your user account is a member of the Domain Admins group.
Answer: A
Explanation: If you want your DNS server to be able to forward name resolution
requests to the Internet, you have to delete the root zone first and then configure the
DNS server to forward queries to Internet DNS zones.
Incorrect answers:
B: Recursion is the process whereby which the DNS server queries other DNS servers to
resolve name resolution requests. If you have a DNS server that is not configured with
forwarders, and the DNS server does not respond to any DNS clients directly, then it is
recommended that your disable recursion for the DNS server
C: An Active Directory-integrated zone can be defined as an improved version of a
primary DNS zone because it can use multi-master replication and the security features
of Active Directory.
D: You do not need to be a member of the Domain Admins group to configure
forwarders in DNS. You have to be member of the DNSAdmins group.
QUESTION 2:
You work as the network administrator at CertKiller.com. The CertKiller.com
network consists of a single Active Directory single domain named Certkiller .com. All
servers on the CertKiller.com network run Windows Server 2003 and all client
computers run Windows XP Professional. Several domain controllers run the DNS
service to provide name resolution services for CertKiller.com.
The CertKiller.com network consists of an internal network and a perimeter
network. A firewall is configured between the internal network and the perimeter
network. The perimeter network hosts the company’s FTP and Web servers.
Internet connectivity is provided through the use of a proxy server. Most DNS
servers handle name resolution requests for Internet zones. Currently, the proxy
server is overloaded with recursive requests. You also suspect that several DNS
servers are contacting Internet DNS servers directly. You need to resolve both of
these issues.
You want to prevent your internal DNS servers from contacting Internet DNS
servers directly. You must ensure that the internal domain namespace is not
exposed to Internet servers.
What should you do? (Each correct answer presents part of the solution. Choose
THREE.)

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A. Install another DNS server on the perimeter network.
Configure this server as a caching-only DNS server.
B. Configure the internal DNS servers to use the DNS server on the perimeter network as
a forwarder.
C. Configure the firewall between the perimeter network and the internal network to only
allow DNS queries to the caching-only DNS server.
D. Disable recursion on all internal DNS servers.
E. Install another DNS server on the perimeter network.
Configure this server to host a secondary DNS zone.
Answer: A, B, C
Explanation: You need to configure a DNS server to be a forwarder. The best
solution is to install a caching-only DNS server on the perimeter network. The
caching-only DNS server will not store any information on your internal DNS
servers. By configuring the firewall between the perimeter network and the internal
network to only allow DNS queries to the caching-only DNS server, you would be
preventing your internal DNS servers from contacting Internet DNS servers
directly.
Incorrect answers:
D: This will result in your internal DNS servers not being able to use forwarders.
E: Creating a secondary DNS zone on a DNS server hosted in the perimeter network will
expose the internal domain namespace is to Internet servers. One of your requirements is
to prevent this.
QUESTION 3:
You work as the network administrator at CertKiller.com. The CertKiller.com
network consists of a single Active Directory single domain named Certkiller .com. All
servers on the CertKiller.com network run Windows Server 2003 and all client
computers run Windows XP Professional.
The CertKiller.com network consists of an internal network and a perimeter
network. The internal network consists of four subnets, with all subnets other than
Subnet A containing a DHCP server. Subnet A contains a DHCP Relay Agent. All
client computers receive IP addresses from the DHCP servers on the network. A
domain controller named Certkiller -DC01 is configured as a DNS server, and hosts
an Active Directory-integrated zone. The perimeter network hosts the company’s
FTP and Web servers, and an external DNS server.
To optimize performance on your network, you deploy another internal DNS server
named Certkiller -SR25 in Subnet B. You configure all relevant existing network
servers so that they incorporate Certkiller -SR25.
You need to configure Certkiller -SR25 so that it can perform name resolutions
services for CertKiller.com resources. You want to ensure that only the external DNS
server handles name resolution requests for Internet computers.
What should you do? (Each correct answer presents part of the solution. Choose

Actualtest.org – The Power of Knowing
TWO.)
A. On Certkiller -SR25, configure a forward lookup zone for the internal network.
B. Configure the external DNS server to so that it is listed as the primary DNS server in
the DHCP scope settings.
C. On Certkiller -SR25, configure all unresolved host names to be forwarded to the
external DNS server.
D. Configure Certkiller -SR25 so that it is a conditional forwarder.
Answer: A, C
Explanation: If you want the DNS server to be authoritative for a zone, you have to
create and configure a forward lookup zone. A forward lookup zone contains DNS
domain zones that are hosted on the DNS server. Forward lookup zones contain
name to IP address mappings. The DNS server will then be able to resolve a host
name to an IP address. You should then configure Certkiller -SR25 to forward all
unresolved host names to be forwarded to the external DNS server.
Incorrect answers:
B: You should always configure the internal network to resolve requests internally for all
internal CertKiller.com resources.
D: A conditional forwarder works well when you have multiple domains. You would
configure a DNS server as a conditional forwarder if you need a DNS server to forward
requests for a specific domain to specific DNS servers.

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