Exam Prep Questions

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Question 1

If a host can ping other hosts on the same network, cannot ping hosts on remote networks, yet no other hosts on the same network have problems pinging hosts on remote networks, which of the following is likely to be the problem? (Choose all that apply.)

  • A. Host has incorrect IP address

  • B. Host has incorrect subnet mask

  • C. Host has incorrect default gateway set

  • D. Default gateway has incorrect subnet mask set

A1:

Answers B and C are correct. It is possible that the host can ping other hosts on the same network if the subnet mask is incorrect, but in such a case, it is unable to ping all hosts on the same network. More probable is if the incorrect default gateway is set. If possible, compare the default gateway on this computer to that of other computers on the same network. Answer A is incorrect; it is unlikely that the host has the incorrect IP address. Answer D is incorrect because other hosts on the network are not experiencing problems and traffic is passing well to remote networks.

Question 2

Which tool provides you with a description of the network path between a local and a remote host as well as provides you with detailed statistics as to the time it takes for each step of the path as well as reliability statistics for each hop in the path?

  • A. tracert

  • B. telnet

  • C. ping

  • D. pathping

A2:

Answer D is correct. Pathping provides you with a description of the network path as well as provides time and reliability statistics for each stage of the path. Answer A is incorrect; tracert provides you with the path and the time statistics, but tells you nothing about the reliability of the path. Answer B is incorrect; telnet can neither display information about the path or reliability statistics. Answer C is incorrect; ping can only display reliability statistics about the destination host, it cannot display information about hosts on the path in between.

Question 3

Your organization has two DNS servers located on the internal network. The first has the IP address 10.10.15.20, and the second has the IP address 10.10.15.30. One DNS server is located on the screened subnet and is configured as a forwarder. The IP address of this server is 10.10.20.30. The forwarder hosts no zone files. Finally, there is the ISP's DNS server 165.193.123.49. Port 53 on the external and internal firewall is open only to IP address 10.10.20.30. The two internal DNS servers host an Active Directory integrated primary zone and have had their root hints deleted. You have an Exchange Server 2003 computer located on the internal network that needs to be able to send and receive email from SMTP servers on the Internet. It also needs to be able to send message traffic to other Exchange servers in the forest. Port 25 on the external and internal firewall have been opened from this computer. You are statically configuring the DNS client information for this server. Which of the following settings could you use?

  • A. Preferred: 10.10.15.20, Alternate: 10.10.15.30

  • B. Preferred: 10.10.15.20, Alternate: 165.193.123.49

  • C. Preferred: 165.193.123.49, Alternate: 10.10.15.30

  • D. Preferred: 10.10.15.20, Alternate: 10.10.20.30

  • E. Preferred: 10.10.20.30, Alternate: 165.193.123.49

A3:

Answer D is correct. By setting the preferred server to 10.10.15.20, all traffic to internal Exchange servers can be resolved. By setting the alternate server to 10.10.20.30, which is a forwarder, external hostnames can be resolved. Answer A is incorrect; it sets both preferred and alternate DNS servers to the internal servers. Answer B is incorrect; although the alternate is set to the ISP's DNS server, DNS traffic can only pass over the firewall to and from the DNS forwarder on the screened subnet. Answer C is incorrect; although the primary is set to the ISP's DNS server, DNS traffic can only pass over the firewall to and from the DNS forwarder on the screened subnet. Answer E is incorrect; although the forwarder is set as the primary server, no internal server is provided. Internal hostnames cannot be resolved.

Question 4

Your organization has configured a Windows Server 2003 computer running on the screened subnet as a smart host. This smart host is addressed by computers on the internal network via IP rather than FQDN. There is another Windows Server 2003 computer located on the screened subnet that is used as a DNS forwarder to a DNS server hosted by your organization's ISP. Your organization's Exchange Server 2003 computers are configured to use two DNS servers, each of which has had the root hints file removed, for name resolution. There appears to be a problem with sending mail to hosts on the Internet, but users in your organization are able to receive mail from the Internet. They are also able to send and receive email internally without a problem. You have strong reason to believe that hostnames for external mail are not being resolved correctly. Which of the following computers should you check the DNS settings for first?

  • A. Exchange Server 2003 computer

  • B. DNS forwarder

  • C. Smart host

  • D. Internal DNS server

  • E. ISP DNS server

A4:

Answer C is correct. You should check the smart host. As it is addressed via IP rather than FQDN, the Exchange servers can forward communication to the smart host. It is the smart host that performs external DNS resolution. This is the likely culprit. Answer A is incorrect; the internal Exchange Server 2003 computers do not need to perform external resolution because they forward all externally addressed email to the smart host. Although the fault might lie in the DNS forwarder, you should check the smart host first to see if the problem lies there. Answer D is incorrect; the internal DNS server is not used at all in the external resolution process. Answer E is incorrect; you would check the ISP's DNS server after you had ascertained that the smart host was functioning correctly.

Question 5

Your company is separated into several different divisions, each of which is represented by a separate tree in a single Windows Server 2003 forest. There is a single Exchange Server 2003 organization at the company. Users in each tree receive mail at different domain names. The first tree receives it at examcram2.com, the second receives it at quepublishing.com. You have received reports that users in the examcram2.com domain are not receiving mail from external users, though users in the quepublishing.com domain are. Mail can be sent to and from all users internally. Which of the following commands would you use to check that the mail server records are configured correctly for the domain that is experiencing problems?

  • A. nslookup mail quepublishing.com

  • B. nslookup mail examcram2.com

  • C. nslookup querytype=mail quepublishing.com

  • D. nslookup querytype=mail examcram2.com

  • E. nslookup querytype=mx quepublishing.com

  • F. nslookup querytype=mx examcram2.com

A5:

Answer F is correct. The examcram2.com domain is the one that is experiencing problems. The querytype=mx switch to the nslookup command locates all MX records for the queried domain. Answer A is incorrect; it queries the wrong domain and uses the wrong syntax. Answer B is incorrect; it uses the wrong syntax. Answer C is incorrect; it queries the wrong domain and uses the wrong syntax. Answer D is incorrect; it uses the wrong syntax. Answer E is incorrect; it queries the wrong domain.

Question 6

An Exchange Server 2003 computer is located on the network shown in Figure 10.7 and has the following IP address configuration.

 IP Address 10.10.10.238 Subnet Mask 255.255.255.240 Default Gateway 10.10.10.225 

Figure 10.7. Exhibit for Question 6.

graphics/10fig07.gif


The router connecting network alpha to network beta has the IP address of its interface on network alpha set as 10.10.10.225. The router's interface on network beta has the IP address 10.10.10.193.

After finding that the Exchange Server 2003 computer is not functioning correctly, you discover that the subnet mask should have been configured as 255.255.255.224.

The subnet mask on the Exchange Server 2003 computer is now reconfigured correctly.

Host one on network alpha has an IP address of 10.10.10.242.

Host two on network alpha has an IP address of 10.10.10.232.

Which of the following hosts will the Exchange Server 2003 computer be able to communicate with now that it would not have been able to communicate with when it had the incorrect subnet mask?

  • A. Hosts on network beta

  • B. Host one

  • C. Host two

  • D. The router's interface on network alpha

  • E. The router's interface on network beta

A6:

Answer B is correct. With the incorrect subnet mask configuration, host one would have originally appeared to be on a separate network to the Exchange server. Answer A is incorrect; even with the incorrect subnet mask configuration, the default gateway was accessible, which means that hosts on network beta could be contacted. Answer C is incorrect; even with the incorrect subnet mask, host two could be contacted as it appeared to be on the same network as the Exchange server. Answer D is incorrect; even with the incorrect subnet mask, the default gateway could be contacted. Answer E is incorrect; because the default gateway could be contacted with the incorrect subnet mask information, it follows that the other interface on the router would be able to be contacted as well.

Question 7

You have a Windows Server 2003 computer hosting Exchange Server 2003 that has two network cards, each located on different networks. These network cards have the following IP address information:

Network Card 1

 IP Address: 10.10.10.212 Subnet Mask: 255.255.255.240 Default Gateway: 10.10.10.215 

Network Card 2

 IP Address: 10.10.10.146 Subnet Mask: 255.255.255.192 Default Gateway: 10.10.10.160 

Which of the following IP addresses are on the same subnet as either Network Card 1 or Network Card 2? (Choose all that apply.)

  • A. 10.10.10.226

  • B. 10.10.10.218

  • C. 10.10.10.206

  • D. 10.10.10.195

  • E. 10.10.10.170

  • F. 10.10.10.120

A7:

Answers B and E are correct. IP address 10.10.10.218 is on the same subnet as Network Card 1. The range of network card 1's subnet is from 10.10.10.208 to 10.10.10.223. IP address 10.10.10.170 is on the same subnet as Network Card 2. The range of network card 2's subnet is from 10.10.10.128 to 10.10.10.191. Answer A is incorrect; 10.10.10.226 is outside the range of Network Card 1's subnet. Answer C is incorrect; 10.10.10.206 is outside the range of Network Card 1's subnet. Answer D is incorrect; 10.10.10.195 is outside the range of Network Card 2's subnet. Answer F is incorrect; 10.10.10.120 is outside the range of network card 2's subnet.

Question 8

A particular computer is running Exchange Server 2003. You want to determine whether the computer's network card works, whether its hostname is correctly registered in DNS, and if it is able to contact the default gateway. Which of the following tools can perform this function?

  • A. NetDiag

  • B. nslookup

  • C. pathping

  • D. netstat

A8:

Answer A is correct. NetDiag performs a multitude of different network diagnostic tasks. This includes checking that a network card is working, that the hostname is correctly registered in DNS, and that the computer is able to contact the default gateway. Answer B is incorrect; nslookup is used to query DNS servers only. Answer C is incorrect; pathping is used to measure network reliability and to provide a path between two hosts. Answer D is incorrect; netstat shows the current network connections that have been made to a particular server.

Question 9

Which of the following diagnoses can you discount if you know that the Exchange Server 2003 computer was functioning one week ago? (Choose all that apply.)

  • A. The DNS server that Exchange has been set to use has failed.

  • B. The incorrect default gateway has been set.

  • C. The incorrect subnet mask has been assigned.

  • D. The incorrect IP address has been set.

  • E. The default gateway has failed.

  • F. The firewall is blocking the mail server from sending mail.

A9:

Answers B, C, D, and F are correct. If the default gateway had been set, the Exchange server would not have functioned one week ago. If the incorrect subnet mask had been assigned, the Exchange server would not have functioned one week ago. If the incorrect IP address had been assigned, the Exchange server would not have functioned one week ago. If the firewall was blocking the mail server from sending mail, it would have done so last week. Answer A is incorrect; the DNS server that Exchange is set to use could have failed since last week. Answer E is incorrect; the default gateway could have failed in the last week.

Question 10

You are attempting to diagnose a problem with an Exchange Server 2003 computer. The SMTP Server\Local Queue Length counter has steadily fluctuated between 450 and 500 in the last half an hour, but the SMTP Server\Remote Queue Length rose from 700 to 3000. Which of the following are unlikely to be the cause of the problem? (Choose all that apply.)

  • A. The incorrect IP address has been configured for the Exchange Server computer.

  • B. The ISP DNS server used for external resolution has failed.

  • C. The smart host on the screened subnet has failed.

  • D. There is a problem with the global catalog server.

A10:

Answers B and C are correct. If the ISP DNS server used for external resolution has failed, mail in the remote queue cannot be sent because the remote SMTP server cannot be located. If a smart host is being used to send mail externally, its failure would lead to a rise of the Remote Queue. Although incoming mail would also be lost, it might be that there is enough internal message traffic to keep the Local Queue Length ticking along. Answer A is incorrect; if the incorrect IP address had been configured, the Local Queue would not have fluctuated as it had, indicating that incoming mail was being processed and received. Answer D is incorrect; a failure of the global catalog server would have led to a rise in the Local Queue Length.


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    Implementing and Managing Exchange Server 2003 Exam Cram 2 Exam 70-284
    MCSA/MCSE Implementing and Managing Exchange Server 2003 Exam Cram 2 (Exam Cram 70-284)
    ISBN: 0789730987
    EAN: 2147483647
    Year: 2004
    Pages: 171

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