Free Microsoft 70-291 Q & A / Study Guide Part II

Best Microsoft MCTS Certification, Microsoft MCITP Training at certkingdom.com

QUESTION 1:

A. On Certkingdom -PR01, run the net session command.
B. On Certkingdom -PR01, run the netstat command.
C. On Certkingdom -PR01, run the netsh command.
D. On Certkingdom -PR01, run the netcap command.

Answer: D

Explaination: Netstcap.exe is a command line tool that could be used to capture the
network traffic. A filter can be created to be used during the capture to determine the
MAC address the print jobs are being sent to. The Network Monitor Capture Utility (
Netcap.exe) can be used to capture network traffic in Network Monitor. Netcap provides
capture abilities only from a command prompt; to open the resulting capture (.cap) files,
you must use the full Network Monitor interface. Netcap is installed when you install the
Support tools that are on the Windows XP CD-ROM. Netcap provides capture abilities
that are similar to the version of Network Monitor that is included with the Windows
Server products; however, you must use Netcap at a command prompt. Netcap installs
the Network Monitor driver and binds it to all adapters when you first run the Netcap command.
Incorrect Options:
A: The net session command can be used to view the computer names and user names of
users on a server, to see if users have files open, and to see how long each user’s session
has been idle. Net session manages server computer connections – used without
parameters, net session displays information about all sessions with the local computer.
B: The netstat command is not a utility to use when troubleshooting NetBIOS names, but
is used to display TCP/IP and port information.
C: The Network Shell utility (Netsh.exe) can perform a wide range of system
configuration tasks. You can use commands in the Netsh Interface IP context to
configure the TCP/IP protocol (including addresses, default gateways, DNS servers, and
WINS servers) and to display configuration and statistical information.
Reference:
Microsoft Knowledge Base: 306794: How to Install the Support Tools from the Windows
XP CD-ROM Network Monitor is provided with Windows Server products and
Microsoft Systems Management Server (SMS). Microsoft Corporation, 2004
Deborah Littlejohn Shinder, Dr. Thomas W. Shinder, Chad Todd & Laura Hunter,
MCSA/MCSE: Exam 70-291: Implementing, Managing, and Maintaining a Windows
Server 2003 Network Infrastructure Guide & DVD Training System, pp. 686, 854-856,
926

QUESTION 2:

You work as the network administrator at Certkingdom.com The Certkingdom.com
network consists of two subnets. All servers on the Certkingdom.com network run
Windows Server 2003 and all client computers run Windows XP Professional. All
servers are located in a central data center that uses a single IP subnet and all client
computers are located in one subnet.
The data center contains two routers named Certkingdom -SR01 and
Certkingdom -SR02, two domain controllers named Certkingdom -DC01 and
Certkingdom -DC02, and two file servers named Certkingdom -SR03 and
Certkingdom -SR04. The IP addresses of these servers are indicated in the table
below.

Host name	IP address
Certkingdom-DC01	10.10.10.1
Certkingdom -DC02	10.10.10.2
Certkingdom -SR01	10.10.1.1
Certkingdom -SR02	10.10.1.2
Certkingdom -SR03	10.10.11.1
Certkingdom -SR04	10.10.11.2

You have received instruction from the CIO to install a new database server in the
data center. You install Windows Server 2003 on a new server computer named
Certkingdom -DB01 and hand it over to a database administrator named Dean
Austin. Dean Austin installs Microsoft SQL Server 2005 and makes some changes to
the TCP/IP settings on Certkingdom -DB01 as shown in the following table.

Parameter	Value
IP address	10.10.1.3
Subnet mask	255.255.255.0
Default gateway	10.10.1.2

Later, Dean Austin complains that Certkingdom -DB01 cannot communicate with the
other servers in the data center. All other servers in the data center can
communicate with the other servers as well as the client computers. You log on to
Certkingdom -DB01 and attempt to ping Certkingdom -DC01 but you receive the
following error message: “Destination host unreachable”.
What should you do to ensure that Certkingdom -DB01 can communicate with the
other computers in the Certkingdom.com network?

A. Configure Certkingdom -DB01 with a default gateway of 10.10.1.1.
B. Configure Certkingdom -DB01 with a subnet mask of 255.255.0.0.
C. Configure Certkingdom -DB01 with an IP address of 10.10.10.3.
D. Configure Certkingdom -DB01 with an IP address of 10.10.11.3.

Answer: B

Explaination: Large networks are subdivided to create smaller subnetworks to reduce
overall network traffic by keeping local traffic on the local subnet and sending all
nonlocal traffic to the router. In order to create a subnetwork, we need to have a system
for addressing that allows us to use the network ID and host ID within the class-based
system. This is accomplished through the use of a subnet mask. To determine the
appropriate custom subnet mask (typically referred to simply as subnet mask) for a
network, you must first:
1. Determine the number of host bits to be used for subnetting.
2. Determine the new subnetted network IDs.
3. Determine the IP addresses for each new subnet.
4. Determine the appropriate subnet mask.
Incorrect Answers:
A: You need to assign the correct subnet mask to ensure connectivity.
C, D: The problem in this scenario is not a faulty IP address. It is the appropriate subnet
mask that has to be determined to enable connectivity.
Reference:
Deborah Littlejohn Shinder, Dr. Thomas W. Shinder, Chad Todd and Laura Hunter,
MCSA/MCSE: Exam 70-291: Implementing, Managing, and Maintaining a Windows
Server 2003 Network Infrastructure Guide & DVD Training System, p. 57

QUESTION 3:

You work as the network administrator at Certkingdom.com The Certkingdom.com
network consists of two subnets named Subnet A and Subnet B. Subnet A and
Subnet B are connected by a router. All computers on the Certkingdom.com network
are configured with static IP addresses. All network servers run Windows Server
2003 and all client computers run Windows XP Professional.
Certkingdom.com hires a new Sales manager named Amy Wilson. You install a new
client computer named Certkingdom -WS291 for Amy Wilson. You then add
Certkingdom -WS291 to Subnet A. The relevant portion of the network is configured
as shown in the exhibit.

However, Amy Wilson complains that Certkingdom -WS291 cannot communicate
with other hosts on the network.
What should you do to ensure that Certkingdom -WS291 can communicate with all
local and remote computers on the Certkingdom.com network?

A. Configure Certkingdom -WS291 with a default gateway of 192.168.28.84.
B. Configure Certkingdom -WS291 with a default gateway of 192.168.2.1.
C. Configure Certkingdom -WS291 with a subnet mask of 255.255.255.128.
D. Configure Certkingdom -WS291 with a subnet mask of 255.255.255.192.

Answer: C

Explaination: It is evident from the exhibit that the file server and
Certkingdom -WS291 have a different subnet mask. This is the reason why they
cannot communicate with each other. You must therefore change the subnet mask
of Certkingdom -WS291 to 255.255.255.128.
Incorrect Answers:
A, B: The problem is not the gateway IP address that is faulty, but rather the subnet
mask.
D: This option suggests the correct object that has to be changed, but it gives the wrong
subnet mask.
Reference:
Deborah Littlejohn Shinder, Dr. Thomas W. Shinder, Chad Todd and Laura Hunter,
MCSA/MCSE: Exam 70-291: Implementing, Managing, and Maintaining a Windows
Server 2003 Network Infrastructure Guide & DVD Training System, p. 57

QUESTION 4:

You work as the network administrator at Certkingdom.com The Certkingdom.com
network consists of a single Active Directory domain named Certkingdom.com
Certkingdom.com has its headquarters in Chicago and branch offices in Dallas and
Miami. All servers on the Certkingdom.com network run Windows Server 2003 and all
client computers run Windows XP Professional. You work in the Miami branch
office.
The network at the Miami branch office consists of 25 different subnets, each with a
maximum of six computers. The network administrator at headquarters has
allocated the 192.168.3.0/24 network address to the Miami branch office.
You install a new server named Certkingdom -SR21 in the Miami branch office. You
need to configure the Internet Protocol (TCP/IP) properties for Certkingdom -SR21.
You configure Certkingdom -SR21 with an IP address of 192.168.3.44. What subnet
mask should you use?

A. A subnet mask of 255.255.255.0.
B. A subnet mask of 255.255.255.128.
C. A subnet mask of 255.255.255.192.
D. A subnet mask of 255.255.255.240.
E. A subnet mask of 255.255.255.248.

Answer: E

Explaination: The network address is: 192.168.2.0/24, which means
11111111.11111111.11111111.0 in binary.
Therefore, you can use the last octet to configure the 30 subnets and 6 hosts in each
subnet
You need only six host PCs. When you convert to binary, it is: 00000111. As a result,
you use 3 bits.
This leaves 5 bits for the subnets 11111000 converted to decimal:
128+64+32+16+8=248, therefore the subnet mask will be: 255.255.255.248.
Reference:
Deborah Littlejohn Shinder, Dr. Thomas W. Shinder, Chad Todd and Laura Hunter,
MCSA/MCSE: Exam 70-291: Implementing, Managing, and Maintaining a Windows
Server 2003 Network Infrastructure Guide & DVD Training System, p.57

QUESTION 5:

You work as the network administrator at Certkingdom.com The Certkingdom.com
network consists of a single Active Directory domain named Certkingdom.com
Certkingdom.com has its headquarters in Chicago and a branch office in Dallas. All
servers on the Certkingdom.com network run Windows Server 2003 and all client
computers run Windows XP Professional. You work in the Dallas branch office.
The network at the Dallas branch office consists of a single subnet that contains 150
client computers and 12 servers. The network administrator at headquarters has
allocated the 10.10.0.0/16 network address to the Dallas branch office.
You have received instruction from your manager to place all servers at the Dallas
branch office into a separate subnet that uses the 192.168.10 public addressing
scheme. Your manager asks you to make allowance for a maximum of 30 servers in
the new subnet.
Which subnet mask should you use for the new subnet?

A. 255.255.255.224
B. 255.255.255.240
C. 255.255.255.248
D. 255.255.255.252
E. 255.255.255.254

Answer: A

Explaination: A 255.255.255.224 subnet mask gives five host address bits, so the
maximum number of host addresses is 2 ^ 5 – 2 = 30 host addresses. Thus
255.255.255.224 is the only subnet mask that will allow for sufficient IP addresses in
case of further growth, whilst still conserving as many current addresses as possible.
Reference:
Deborah Littlejohn Shinder, Dr. Thomas W. Shinder, Chad Todd and Laura Hunter,
MCSA/MCSE: Exam 70-291: Implementing, Managing, and Maintaining a Windows
Server 2003 Network Infrastructure Guide & DVD Training System, p. 62

QUESTION 6:

DRAG DROP
You work as the network administrator at Certkingdom.com The Certkingdom.com
network consists of a single Active Directory domain named Certkingdom.com All
servers on the Certkingdom.com network run Windows Server 2003 and all client
computers run Windows XP Professional.
You have installed a new server named Certkingdom -SR06 on the network. The
relevant portion of the network is shown on the exhibit.

You want to configure Certkingdom -SR06 with a valid static IP configuration.
Certkingdom -SR06 must be able to communicate with all hosts on the network and
on the internet. You also need to configure Certkingdom -SR06 to use the DNS server
on the local subnet for name resolution. In addition, you must configure redundancy
for name resolution.
How should you configure Certkingdom -SR06?
To answer drag the appropriate IP addresses and Subnet masks to the appropriate
places.

Answer:

Explaination:
The Class C address 192.168.0.100 has to be the IP address to enable
Certkingdom -SR06 to communicate with all hosts on the network and on the internet
as 192.168.0.1, 192.168.0.2 and 192.168.0.110 are already in use. 192.168.5.2 and
192.168.5.100 are on the wrong subnet, and besides, 192.168.5.12 is already in use.
The subnet mask for this Class C address is 255.255.255.0. The default gateway
should be 192.168.0.1. To configure redundancy for name resolution, configure the
preferred DNS server/primary address as 192.168.0.2, and the alternate DNS
server/secondary address as 192.168.5.2.
Reference:
J. C. Mackin, Ian McLean, MCSA/MCSE Self-Paced Training Kit (exam 70-291):
Implementing, Managing, and Maintaining a Microsoft Windows Server 2003 network
Infrastructure, Part 1, Chapter 2, pp. 80-116

QUESTION 7:

A. On the DHCP server, increase the DHCP lease period.
B. Configure alternate IP settings for Certkingdom -SR25 on the Alternate Configuration
tab of the Internet Protocol (TCP/IP) properties.
C. Configure the DHCP scope in the 169.254.0.1. – 169.254.255.254 range.
D. On the DHCP server, configure the DHCP 001 Resource Location Servers reservation
option for Certkingdom -SR25.

Answer: B

Explaination: Windows Server 2003 includes the Alternate Configuration feature.
The Windows Server 2003 servers can be configured to use an alternate static IP
configuration if a DHCP server is unavailable. When a DHCP client determines that
the DHCP server is unavailable, it will automatically change over and also configure
the TCP/IP stack with the static address information specified on the Alternate
Configuration tab of the Internet Protocol (TCP/IP) properties.
Incorrect Answers:
A: Increasing the lease period would result in DHCP clients requesting leases less
frequently, but won’t guarantee that Certkingdom -SR25 will be available when the DHCP
server is down.
C: Modifying the DHCP scope to the 169.254.0.1. – 169.254.255.254 range will still be
reliant on the DHCP server.
D: Configuring the DHCP 001 Resource Location Servers reservation option for
Certkingdom -SR25 on the DHCP server will not ensure that Certkingdom -SR25 will
receive an IP address or have the IP address renewed.
Reference:
J. C. Mackin, Ian McLean, MCSA/MCSE Self-Paced Training Kit (exam 70-291):
Implementing, Managing, and Maintaining a Microsoft Windows Server 2003 network
Infrastructure, Part 1, Chapter 2, pp. 114, 117

QUESTION 8:

A. Establish a Telnet session to Certkingdom -SR34 and then run the net start dhcp
command.
B. Establish a Telnet session to Certkingdom -SR34 and then run the net start dhcpserver
command.
C. Establish a Telnet session to Certkingdom -SR34 and then run the ipconfig /renew
command.
D. On Certkingdom -WS291, run the netsh dhcp server\\ Certkingdom -SR34 show server
command.

Answer: B

Explaination: You can start the DHCP Server service by executing the Net Start
Dhcpserver command at the command prompt.
Telnet is a protocol that enables an Internet user to log on to and enter commands on a
remote computer linked to the Internet, as if the user were using a text-based terminal
directly attached to that computer. Telnet is part of the TCP/IP suite of protocols. The
term telnet also refers to the software (client or server component) that implements this
protocol.
Given the fact that you can ping Certkingdom -SR34 you should then establish a Telnet
session to Certkingdom -SR34 and then run the appropriate command.
Reference:
J. C. Mackin & Ian McLean, MCSA/MCSE self-paced training kit (exam 70-291):
implementing, managing, and maintaining a Microsoft Windows Server 2003 network
infrastructure, Microsoft Press, Redmond, 2004, p. 7-23

QUESTION 9:

A. Run the net session command.
B. Run the netstat command.
C. Run the netsh command.
D. Run the netcap command.

Answer: D

Explaination: Netstcap.exe is a command line tool that could be used to capture the
network traffic. A filter can be created to be used during the capture to determine the
MAC address the print jobs are being sent to. The Network Monitor Capture Utility (
Netcap.exe) can be used to capture network traffic in Network Monitor. Netcap provides
capture abilities only from a command prompt; to open the resulting capture (.cap) files,
you must use the full Network Monitor interface. Netcap is installed when you install the
Support tools that are on the Windows XP CD-ROM. Netcap provides capture abilities
that are similar to the version of Network Monitor that is included with the Windows
Server products; however, you must use Netcap at a command prompt. Netcap installs
the Network Monitor driver and binds it to all adapters when you first run the Netcap
command.
Incorrect Options:
A: The net session command can be used to view the computer names and user names of users
on a server, to see if users have files open, and to see how long each user’s session has
been idle. Net session manages server computer connections – used without parameters,
net session displays information about all sessions with the local computer.
B: The netstat command is not a utility to use when troubleshooting NetBIOS names, but
is used to show what ports your computer is listening on.: -R is used to reload your
LMHOSTS file located in %systemroot%\system32\drivers\etc., -r will show you which
name resolutions have been answered via broadcasts, and which have been answered via
a NetBIOS name server, -RR switch of the command utility refreshes your NetBIOS
name with a configured WINS server.
C: The Network Shell utility (Netsh.exe) can perform a wide range of system
configuration tasks. You can use commands in the Netsh Interface IP context to
configure the TCP/IP protocol (including addresses, default gateways, DNS servers, and
WINS servers) and to display configuration and statistical information.
Reference:
Microsoft Knowledge Base: 306794: How to Install the Support Tools from the Windows
XP CD-ROM Network Monitor is provided with Windows Server products and
Microsoft Systems Management Server (SMS). Microsoft Corporation, 2004
Deborah Littlejohn Shinder, Dr. Thomas W. Shinder, Chad Todd & Laura Hunter,
MCSA/MCSE: Exam 70-291: Implementing, Managing, and Maintaining a Windows
Server 2003 Network Infrastructure Guide & DVD Training System, pp. 686, 854-856,
926

QUESTION 10:

Network Topology Exhibit:

LAN Settings Exhibit:

You work as the network administrator at Certkingdom.com The Certkingdom.com
network consists of a single Active Directory domain named Certkingdom.com All
servers on the Certkingdom.com network run Windows Server 2003 and all client
computers run Windows XP Professional. The Certkingdom.com network contains a
Microsoft Internet Security and Acceleration (ISA) Server computer named
Certkingdom -SR01, a DNS server named Certkingdom -SR02, a DHCP server named
Certkingdom -SR03, a file server named Certkingdom -SR21, and a Web server named
Certkingdom-SR25. Certkingdom -SR25 also serves as a central antivirus server.
Certkingdom -SR21 is located on the 10.10.11.0 subnet and Certkingdom -SR25 is
located in the perimeter network. Certkingdom -SR21 contains antivirus software
that checks for new virus definitions on Certkingdom -SR25 every hour. You can also
access Certkingdom -SR25 through a virus update Web page to perform manual
virus definition updates.
Certkingdom -SR03 suffers a catastrophic failure and is removed from the network.
Due to budgetary constraints, a replacement for Certkingdom -SR03 will only be
acquired in the next financial year. You need to redesign network addressing
scheme, and change the IP addresses for Certkingdom -SR01 to the addresses shown
in the Network Topology exhibit.
Certkingdom -SR02 contains the new host (A) resource records for
Certkingdom -SR01.
You receive reports about a new virus threat and want to protect the network
immediately by manually downloading the new virus definitions to
Certkingdom -SR21. you log on to Certkingdom -SR21 but discover that you cannot
access the virus update Web page on Certkingdom -SR25. The static TCP/IP
configuration on Certkingdom -SR21 uses Certkingdom -SR02 as the preferred DNS
server.
You confirm that Certkingdom -SR01 is configured properly. On Certkingdom -SR21,
you view the Internet Explorer LAN settings that are shown in the LAN Settings
exhibit.
What should you do to allow Certkingdom -SR21 to connect to Certkingdom -SR25?

A. At a command prompt on Certkingdom -SR21, run the ipconfig /flushdns command.
B. In the LAN settings of Internet Explorer on Certkingdom -SR21, select the
Automatically detect settings check box.
C. At a command prompt on Certkingdom -SR01, run the ipconfig / flushdns command.
D. At a command prompt on Certkingdom -SR01, run the ipconfig /registerdns command.

Answer: A

Explaination: Running the ipconfig /flushdns command will flush and reset the DNS
resolver cache which is necessary to allow connection. Run this command on
Certkingdom -SR21 to connect to Certkingdom -SR25.
Incorrect Answers:
B: Selecting the “Automatically detect settings” checkbox is not going to allow
Certkingdom -SR21 to connect to WWW.
C: The ipconfig /flushdns command flushes and resets the DNS resolver cache. This is
not what is necessary.
D: The ipconfig /registerdns command refreshes all DHCP leases and registers any related
DNS names. This option is available only on Windows 2000 and newer computers that
run the DHCP Client service. This is not going to allow Certkingdom -SR21 to connect to
WWW when it is run on Certkingdom -SR01.
Reference:
James Chellis, Paul Robichaux and Matthew Sheltz, MCSA/MCSE: Windows Server
2003 Network Infrastructure Implementation, Management, and Maintenance Study
Guide, p. 311

QUESTION 11:

You log on to a client computer named Certkingdom -WS292 and run the ipconfig
/renew command successfully.
What should you do to ensure that Certkingdom -WS291 can receive its IP address
configuration from the Certkingdom -SR25?

A. Restart the DHCP service on Certkingdom -SR25.
B. Restart Certkingdom -WS291.
C. Restart Certkingdom -SR25.
D. Add additional IP addresses to the scope on Certkingdom -SR25.

Answer: B

Explaination: It is probable that the TCP/IP stack has a problem because the
computer is unable to send a DHCP discover broadcast packet. This can happen
when you insert a network cable after the PC has been started. You should restart
the client PC to successfully obtain a new IP address.
Incorrect Answers:
A, C, D: This is unnecessary because Certkingdom -WS292 did obtain an IP address from
the DHCP server, thus indicating that the DHCP server configuration is not the issue.
Reference:
Deborah Littlejohn Shinder and Dr. Thomas W. Shinder, MCSA/MCSE Exam 70-290:
Managing and Maintaining a Windows Server 2003 Environment Study Guide & DVD
Training System, p. 629

QUESTION 12:

You work at headquarters. A Certkingdom.com employee named Andy Booth is one of
three employees that are relocated to headquarters from the Dallas office. Andy
Booth uses a portable client computer named Certkingdom -WS291. Andy Booth
complains that when he plugs Certkingdom -WS291 into the LAN connection in his
new cubicle, he cannot connect to network resources on the LAN or the Internet.
None of the other employees are experiencing the same problem.
When you run the ipconfig command from a command prompt on
Certkingdom -WS291, you see the output as shown in the exhibit.

What should you do to allow Certkingdom -WS291 to connect to network resources
on the LAN or the Internet?

A. Configure Certkingdom -WS291 with a subnet mask of 255.255.240.0.
B. Configure Certkingdom -WS291 with a default gateway of 192.168.3.12.
C. Configure Certkingdom -WS291 with a primary DNS suffix of Certkingdom.com
D. Configure Certkingdom -WS291 to automatically lease an IP address from
Certkingdom -SR01.

Answer: D

Explaination: The client computers on the subnet use DHCP to obtain their IP
configurations. Certkingdom -WS291 has a static IP address, and therefore cannot
obtain a valid IP configuration from the DHCP server.
Incorrect Answers:
A: By changing the subnet mask you will not ensure that Certkingdom -WS291 will
connect to other computers and the Internet.
B: Changing the default gateway will not enable Certkingdom -WS291 LAN connection.
Besides, 192.168.3.12 is the IP address of the DHCP server.
C: Adding a primary DNS suffix means that only domain names listed in that window
will be tried for resolution purposes. Both the connection-specific and primary DNS
suffix are ignored.
Reference:
Deborah Littlejohn Shinder, Dr. Thomas W. Shinder, Chad Todd and Laura Hunter,
Implementing, Managing, and Maintaining a Windows Server 2003 Network
Infrastructure Guide & DVD Training System, p. 515

QUESTION 13:

A. Reconfigure Internet Connection Sharing on Certkingdom -WS291.
B. Configure the shared dial-up connection on Certkingdom -WS291 so that automatic
dialog is enabled.
C. Configure Certkingdom -WS292 to receive an IP lease from a DHCP server.
D. Configure Certkingdom -WS292 to use Certkingdom -WS291 for DNS name resolution.

Answer: C.

Explaination: The problem is most likely caused by an incorrect or non-existent
default gateway setting on Certkingdom -WS292. If you configure
Certkingdom -WS292 to use DHCP to obtain IP addressing information,
Certkingdom -WS292 will receive the correct settings from the ICS service on
Certkingdom -WS291.
Incorrect Answers:
A: The question refers to a shared dial-up connection on Certkingdom -WS291 not
working. If the dial-up connection is shared, then Internet Connection Sharing is enabled
already.
B: The question states that Certkingdom -WS291 automatically connects to the network at
the main office whenever the user on Certkingdom -WS291 attempts to access resources
located on the main office network. This indicates that automatic dial-up is already
configured.
D: Certkingdom -WS291 is not a DNS server. The ICS service has a DNS proxy that
would pass DNS requests to whichever DNS server Certkingdom -WS291 is using.
Reference:
J. C. Mackin, Ian McLean, MCSA/MCSE Self-Paced Training Kit (exam 70-291):
Implementing, Managing, and Maintaining a Microsoft Windows Server 2003 network
Infrastructure, Part 1, Chapters 1 & 2, pp. 45, 124

QUESTION 14:

A. On Certkingdom -SR25, configure Conflict detection attempts to 1.
B. On Certkingdom -SR25, configure Conflict detection attempts to 3.
C. On Certkingdom -SR25, configure client reservations for each client computer’s MAC
address.
D. On Certkingdom -SR25, activate and reconcile the scopes.

Answer: A

Explaination: When conflict detection attempts are set, the DHCP server uses the
Packet Internet Groper (ping) process to test available scope IP addresses before
including these addresses in DHCP lease offers to clients. A successful ping means
that the IP address is in use on the network. This results in the DHCP server not
offering to lease the address to a client.
If the ping request fails and times out, it indicates that the IP address is not in use on the
network. In this case, the DHCP server offers to lease the address to a client. Each
additional conflict detection attempt delays the DHCP server response by a second while
waiting for the ping request to time out. This in turn increases the load on the server. A
value of no greater than two (2) is recommended for ping attempts.
Incorrect Answers:
B: Due to the latency involved in ping attempts, the higher the conflict detection value is
set, the longer the lease process will be for every client that uses the DHCP server.
C: Configuring client reservations for each client computer MAC address will involve a
physical visit to each and every client computer if you do not ping it successfully.
D: The scope would already be activated in this scenario.
Reference:
Deborah Littlejohn Shinder, Dr. Thomas W. Shinder, Chad Todd and Laura Hunter,
Implementing, Managing, and Maintaining a Windows Server 2003 Network
Infrastructure Guide & DVD Training System, pp. 208-209

QUESTION 15:

A. On Certkingdom -SR31, modify the Dynamically update DNS A and PTR records only
if requested by the DHCP clients option.
B. On Certkingdom -SR38, modify the Always dynamically update DNS A and PTR
records option.
C. On Certkingdom -SR31, modify the Discard A and PTR records when lease is deleted
option.
D. On Certkingdom -SR31, modify the Dynamically update DNS A and PTR records for
DHCP clients that do not request dynamic updates (for example, clients running
Windows NT 4.0) option.

Answer: D

Explaination: Dynamically Update DNS A And PTR Records For DHCP Clients That
Do Not Request
Updates – This checkbox lets you handle these older clients graciously by making the
updates using a separate mechanism. When checking this check box you will ensure that
Certkingdom -SR38can resolve FQDNs for all client computers on the network under the
given circumstances and the role that Certkingdom -SR31 plays.
Incorrect Answers:
A: Dynamically Update DNS A And PTR Records Only If Requested By The DHCP
Clients – This radio button (which is on by default) tells the DHCP server to register the
update only if the DHCP client asks for DNS registration. When this button is active,
DHCP clients that aren’t hip to DDNS won’t have their DNS records updated. However,
Windows 2000, XP, and Server 2003 DHCP clients are smart enough to ask for the
updates.
B: Always Dynamically Update DNS A And PTR Records – This radio button forces the
DHCP server to register any client to which it issues a lease. This setting may add DNS
registrations for DHCP-enabled devices that don’t really need them, like printer servers;
however, it allows other clients (like Mac OS, Windows NT, and Linux machines) to
have their DNS information automatically updated. This is not what is required.
C: Discard A And PTR Records When Lease Is Deleted – When a DHCP lease expires,
what should happen to the DNS registration? Obviously, it would be nice if the DNS
record associated with a lease vanished when the lease expired; when this checkbox is
checked (as it is by default), that’s exactly what happens. If you uncheck this box, your
DNS will contain entries for expired leases that are no longer valid; when a particular IP
address is reissued on a new lease, the DNS will be updated, but in between leases you’ll
have incorrect data in your DNS-always something to avoid.
Reference:
James Chellis, Paul Robichaux and Matthew Sheltz, MCSA/MCSE: Windows Server
2003 Network Infrastructure Implementation, Management, and Maintenance Study
Guide, p. 246

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