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28 Cards in this Set
- Front
- Back
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Secure dynamic updates are available in which type of DNS zone?
a. Standard primary b. Secondary c. Active Directory–integrated d. Standard primary and secondaryIncorrect. |
c. Active Directory–integrated
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A client that runs Microsoft Windows XP with default settings will rely on DHCP to update which type of records in DNS?
a. a resource records b. SRV resource records c. PTR resource records d. Both SRV and PTR resource records |
c. PTR resource records
EXPLANATION: A client that runs Microsoft Windows 2000 or later will automatically attempt to update its address (A) resource records, but will depend on Dynamic Host Configuration Protocol (DHCP) to dynamically update its pointer (PTR) resource records. (Discussion starts on page 32.) |
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You have not modified the default settings for DNS on the DHCP server that is running the Microsoft Windows Server 2003 operating system. Which of the following client records will be updated in DNS by the DHCP server? (Assume that the clients are running Microsoft Windows XP.)
a. The PTR resource record b. The A resource record c. Both the PTR and the A resource records d. Neither the PTR nor the A resource record |
a. The PTR resource record
EXPLANATION: A Windows Server 2003 server with Dynamic Host Configuration Protocol (DHCP) configured with default settings will dynamically update the client’s pointer (PTR) record in the Domain Name System (DNS). The Windows XP client will contact the DNS server directly to update the address (A) resource record. (Discussion starts on page 32.) |
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You suspect that the DHCP database has become inconsistent on one of the scopes. Which tool can you use to check database integrity and reconcile the database for that scope?
a. The DHCP console b. The Netdiag command-line utility c. The Nbtstat command-line utility d. The Netstat command-line utility |
a. The DHCP console
EXPLANATION: The administration tools that are included in the Dynamic Host Configuration Protocol (DHCP) console offer the ability to check integrity and reconcile either all scopes configured on the DHCP server or individual scopes. (Discussion starts on page 42.) |
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Your Microsoft Windows Server 2003 domain has Microsoft Window XP and Microsoft Windows 98, Second Edition clients. Your network runs DHCP and DNS. You notice that none of the Windows 98 clients can be contacted using their host names. What change should you make?
a. Remove the DNS server and install a WINS server. b. Choose the DHCP option to dynamically update the DNS and PTR records only if requested by DHCP clients. c. Choose the DHCP option to dynamically update the pre–Windows 2000 clients. d. Choose the DHCP option to dynamically update DNS A and PTR records for DHCP clients that do not request updates. |
d. Choose the DHCP option to dynamically update DNS A and PTR records for DHCP clients that do not request updates.
EXPLANATION: Pre–Windows 2000 clients do not have the capability to update their own address (A) records or to request Dynamic Host Configuration Protocol (DHCP) to update their pointer (PTR) resource records. You must choose the DHCP option to dynamically update Domain Name System (DNS) A and PTR records for clients that do not request updates. |
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When DHCP audit logging ends at 12:00 A.M. and there is a current log file with the same name that has been modified within the last 24 hours, what action will DHCP take in regards to the current log file?
a. The log file is overwritten. b. A new log file is automatically saved under a different file name. c. New logging activity is appended to the current log file. d. The new log file is not saved. |
c. New logging activity is appended to the current log file.
EXPLANATION: When Dynamic Host Configuration Protocol (DHCP) logging detects a log file with the same name that has been modified within the last 24 hours, the new logging information will be appended to the current file. |
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You are a network administrator of a Microsoft Windows Server 2003 domain that is configured to use secure dynamic updates for DNS. The network clients have just been updated from Microsoft Windows NT 4 to Microsoft Windows 2000, and the DHCP server has been set to never update DNS on behalf of clients (the DHCP server’s original setting was to always update DNS). You notice that the Windows 2000 clients do not update DNS. Which of the following could be the cause of the problem?
a. The DNS zones are incorrectly set to Active Directory–integrated. b. The DHCP server is not a member of the DnsUpdateProxy security group. c. The DNS server is not a member of the DnsUpdateProxy security group. d. The Windows 2000 clients should be upgraded to Microsoft Windows XP Professional. |
b. The DHCP server is not a member of the DnsUpdateProxy security group.
EXPLANATION: With secure dynamic updates, only the registering client can modify Domain Name System (DNS) records. Because the Dynamic Host Configuration Protocol (DHCP) server initially registered these clients—unless the DHCP server was a member of the DnsUpdateProxy security group—the DHCP server would be the only computer with the right to update DNS records. Adding the DHCP server to the DnsUpdateProxy security group allows the Windows 2000 clients to update DNS. |
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Which action must be taken if you want to configure a DHCP server to update both A resource records and PTR resource records on behalf of a Microsoft Windows NT 4 client?
a. No action is required. b. In the DNS tab of the DHCP server properties dialog box, select c. Dynamically Update DNS A And PTR Records For DHCP Clients That Do Not Request Updates. c. Which action must be taken if you want to configure a DHCP server to update both A resource records and PTR resource records on behalf of a Microsoft Windows NT 4 client? d. In the DNS tab of the DHCP server properties dialog box, select Always Dynamically Update DNS A And PTR Records. e. Register the client as a dynamic host with the DHCP server. |
b. In the DNS tab of the DHCP server properties dialog box, select c. Dynamically Update DNS A And PTR Records For DHCP Clients That Do Not Request Updates.
EXPLANATION: For the Dynamic Host Configuration Protocol (DHCP) server to dynamically update address (A) and pointer (PTR) resource records for Windows NT 4 clients, the DHCP server must be configured with the Dynamically Update DNS A And PTR Records For Clients That Do Not Request Updates option. Only Microsoft Windows 2000 and later client operating systems can request that the DHCP server update records on their behalf. |
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Your Microsoft Windows Server 2003 network is set to allow only secure dynamic updates. Your network clients were running Microsoft Windows NT 4 until you upgraded them to Microsoft Windows XP two days ago. DHCP is set to dynamically update DNS on behalf of the Window NT 4 clients. Since the update, you notice that none of the Windows XP clients will update their A resource records in DNS records. What is the most likely cause of this?
a. Windows XP clients cannot update DNS resource records. b. The DHCP server is not a member of the DnsUpdateProxy security group. c. Windows XP cannot send secure dynamic updates. d. The DHCP server is not set to the default configuration. |
b. The DHCP server is not a member of the DnsUpdateProxy security group.
EXPLANATION: Only the owner of a resource record has permission to update it when using secure dynamic updates. When the Dynamic Host Configuration Protocol (DHCP) server initially updated the address (A) records of the Domain Name System (DNS) server, it became the owner of those records, making the DNS server incapable of future updates. Making the DHCP server a member of the DnsUpdateProxy security group prevents the DHCP server from taking ownership and thus avoids the problem. |
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You must perform a manual backup on a DHCP server named DHCP1. You would like the backup file to be stored on a computer named Server1. Which of the following steps must you take to complete this task?
a. In the Advanced tab of the DHCP server properties page, specify the Universal Naming Convention, or UNC, path to the correct location on the remote server. b. In the DHCP server properties page, specify a local path to initially store the back-up, and then copy the backup file to the correct location on the remote server. c. You cannot specify a path for a manual backup. The backup file will always be stored in the %systemroot%\System32\Dhcp\Backup\New directory. d. Set the properties on the DHCP server to always store backup files on Server1. |
b. In the DHCP server properties page, specify a local path to initially store the back-up, and then copy the backup file to the correct location on the remote server.
EXPLANATION: When you perform a manual backup, you must specify a location that is local to the Dynamic Host Configuration Protocol (DHCP) server to store the backup. The backup file can then be copied to a remote location. |
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For a zone in which only secure dynamic updates are allowed, you have configured your DHCP server to perform dynamic updates on behalf of Microsoft Windows NT 4 clients. All other dynamic DNS settings on the DHCP server have the default settings. After you migrate the clients to Microsoft Windows XP, you find that their A resource records are no longer being updated. What is the most likely explanation for this problem?
a. Secure Dynamic Updates must be disabled when client operating systems are upgraded. b. The DHCP server is not a member of the DnsUpdateProxy security group. c. The Windows XP clients have not been rebooted after the upgrade from Windows NT 4. d. The default DHCP configuration will not allow Windows XP clients to update resource records. |
b. The DHCP server is not a member of the DnsUpdateProxy security group.
EXPLANATION: When secure dynamic updates are enabled, only the owner of the record can update the Domain Name System (DNS). In this scenario, the Dynamic Host Control Protocol (DHCP) server notified DNS of the server with the initial records for the Windows NT 4 clients and is therefore the owner of the record. After the computers are upgraded from Windows NT 4 to Windows XP, the Windows XP clients would attempt to update address (A) resource records but would be unsuccessful. Adding the DHCP server to the DnsUpdateProxy security group eliminates this problem by preventing the DHCP server from becoming the owner of the records. |
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Which command should you use to force a client to renew its DNS registration?
a. Ipconfig /renew b. Ipconfig /renewdns c. Ipconfig /all d. Ipconfig /registerdns |
d. Ipconfig /registerdns
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You have been asked to configure a DHCP server or your network. Your network will utilize the Secure Dynamic Update feature available in Microsoft Windows Server 2003. Your network consists of 5 domain controllers, 2 member servers, and 100 Microsoft Windows XP Professional clients. The DHCP server should be installed on which type of computer?
a. A domain controller b. A member server c. A Microsoft Windows 2000 Professional client d. Any one of the above |
b. A member server
EXPLANATION: When using secure dynamic updates, Dynamic Host Configuration Protocol (DHCP) should not be installed on a domain controller. If you install DHCP on a domain controller with secure dynamic updates configured on it, the domain controller’s resource records will not be secure. (Discussion starts on page 36.) |
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You are the network administrator of a Microsoft Windows Server 2003 network that has 1,200 DHCP clients. You notice that the Dhcp.mdb file is 35 megabytes in size. What action can you take to improve the performance of DHCP?
a. Perform an offline compaction of the DHCP database using the Jetpack utility. b. Do nothing. A 35-megabyte Dhcp.mdb file is acceptable. c. Manually delete some of the older entries in the DHCP database. d. Perform an online compaction of the DHCP database. |
a. Perform an offline compaction of the DHCP database using the Jetpack utility.
EXPLANATION: When the Dynamic Host Configuration Protocol (DHCP) database file exceeds 30 megabytes, you should perform an offline compaction of the DHCP database using the Jetpack utility. |
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Your DHCP database is corrupt, and you are forced to perform a manual restore. The database restore was successful. The week after the restore, you ask one of your junior administrators to make a change to the DHCP server. The junior administrator is not a member of the Administrators group, but has been given permissions to administer the DHCP database. Your assistant reports that she is not able to administer the DHCP database. What is the most likely reason the assistant cannot administer the database?
a. Security credentials are not backed up by DHCP. After you perform a restore, you must reconfigure security credentials associated with the DHCP database. b. Only members of the Administrators group can administer the DHCP server. c. You incorrectly assigned permissions to the junior administrator’s user account. d. The junior administrator must be a member of the Domain Administrator group to administer the DHCP server. |
a. Security credentials are not backed up by DHCP. After you perform a restore, you must reconfigure security credentials associated with the DHCP database.
EXPLANATION: When the Dynamic Host Configuration Protocol (DCHP) database is backed up either manually or automatically, the security credentials are not saved and must be reconfigured if a restore is required. |
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Which of the following client operating systems have the capability of dynamically registering their A records with DNS?
A Microsoft Windows NT Workstation 4 B Microsoft Windows 2000 Professional C Microsoft Windows XP Professional D Microsoft Windows Millennium Edition (Me) E Microsoft Windows 98, Second Edition |
B Windows 2000 Professional
C Windows XP Professional EXPLANATION: Only Windows 2000 and later operating systems have the ability to dynamically update Domain Name System (DNS) address (A) records. |
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You are the network administrator of a Microsoft Windows Server 2003 network. The network has 1,000 clients of which 300 are running Microsoft Windows 98. You are experiencing an unusually high level of duplicate address assignments. What could you do to eliminate this problem with the least amount of administrative effort?
a. Upgrade all Windows 98 clients to Microsoft Windows XP. b. Enable server-based conflict detection on the DHCP server. c. Enable secure dynamic updates. d. Upgrade all Windows 98 clients to Microsoft Windows 2000. |
b. Enable server-based conflict detection on the DHCP server.
EXPLANATION: The Windows Server 2003 Dynamic Host Control Protocol (DHCP) server provides the ability to enable server-based conflict detection, which is a process that pings an Internet Protocol (IP) address before leasing it to a client to ensure that the IP address is not already in use. Microsoft clients that run Windows 2000 or later operating systems automatically verify that an IP address offered by a DHCP server is not in use before accepting it. |
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You are a network administrator of a Microsoft Windows Server 2003 network. Your network is configured to use secure dynamic updates. Users complain that they cannot communicate with one of the Microsoft Windows XP clients on your network using the client’s host name. While troubleshooting this problem, you discover that there is not an A resource record for the client in the DNS database. All configurations appear to be correct. What action could you take to force the Windows XP client to register with the DNS server?
a. Type ipconfig /registerdns at the command prompt on the Windows XP client computer. b. Type ipconfig /renew at the command prompt on the Windows XP client computer. c. Type ipconfig /registerdns at the command prompt on the DNS server. d. Type ipconfig /renew at the command prompt on the DNS server. |
a. Type ipconfig /registerdns at the command prompt on the Windows XP client computer.
EXPLANATION: Typing ipconfig /registerdns on the client will force that client computer to attempt to register an address (A) resource record with the Domain Name System (DNS) server. |
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Your DHCP database has recently been restored from a manual backup. The manual backup file did not contain all of the current records. After restoring the database, you notice that no active leases are displayed in the DHCP console. What additional step should you take?
a. Stop and restart DHCP. b. Delete the manually restored database and restore from an automatic copy. c. Reboot the DNS server. d. Reconcile the DHCP database. |
d. Reconcile the DHCP database.
EXPLANATION: The reconciliation process verifies the summary information in the address leases in the registry with the detailed information in the Dynamic Host Configuration Protocol (DHCP) database. This process might be necessary when restoring a noncurrent copy of the DHCP database. |
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A DHCP database is a distributed database similar to a DNS database?
a. True b. False |
b. False
EXPLANATION: A Dynamic Host Configuration Protocol (DHCP) database is a dynamic database that is updated as clients are assigned or as they release Transmission Control Protocol/Internet Protocol (TCP/IP) configuration parameters. |
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Microsoft Windows Server 2003 DHCP Server supports both automatic and manual backups?
a. True b. False |
a. True
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While reviewing DHCP server logs, you notice several entries with event ID 15, which indicates that a lease was denied. You would like to determine how long this has been occurring and what is causing this error. The DHCP server has been online for only three weeks. To begin troubleshooting this problem, you ask your assistant to provide you with the DHCP logs from the previous three weeks. Your DHCP server has logging enabled with the default configuration. Your assistant reports that he cannot locate DHCP logs for the past three weeks. What is preventing your assistant from obtaining these logs?
a. The assistant user account does not have adequate privileges. b. The DHCP server is not a member of the DnsUpdateProxy security group. c. A DHCP server with default configuration keeps logs for only seven days. d. DHCP logs are erased every 24 hours. |
c. A DHCP server with default configuration keeps logs for only seven days.
EXPLANATION: When you enable logging, the Dynamic Host Configuration Protocol (DHCP) server creates log files named DhcpSrvLog-day.log, where day is a three-letter abbreviation that represents the day the log was created; for example, a log created on Sunday would be named DhcpSrvLog-Sun.log. For this reason, the default configuration will keep only seven days of DHCP logs. For example, on Sunday the DHCP log from the previous Sunday is overwritten. |
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You are a network administrator of a Microsoft Windows Server 2003 network that has Microsoft Windows 2000 and Microsoft Windows XP clients. The network runs DHCP and DNS with default settings. How will the DNS server receive updates of client A and PTR resource records?
a. Client computers will update both A and PTR records dynamically. b. Client computers will depend on DHCP to update both A and PTR records. c. Client computers will update the A records, and the DHCP server will update the PTR records. d. Client computers will update the A records. The PTR records will not be updated if default settings are used. |
c. Client computers will update the A records, and the DHCP server will update the PTR records.
EXPLANATION: Clients that run Windows 2000 and later will update their own address (A) records, but will depend on the Dynamic Host Configuration Protocol (DHCP) to update pointer (PTR) records. |
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When you perform a backup of the DHCP database, which of the following items are backed up?
a. All scopes, superscopes, and multicast scopes b. Client reservations c. Leases d. Options e. All of the above |
e. All of the above
EXPLANATION: The Dynamic Host Configuration Protocol (DHCP) backup process backs up the entire DHCP database including all scopes, superscopes, multicast scopes, client reservations, leases, and options. |
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When logging DHCP data, two events will generate a new audit log file. What are the two events?
A The DHCP service is started. B A 24-hour period has expired. C The local time passes 12:00 A.M. D A 48-hour period has expired. |
A The DHCP service is started.
C The local time passes 12:00 A.M. EXPLANATION: A new log file is created when the Dynamic Host Configuration Protocol (DHCP) service is started or when the local time passes 12:00 A.M. |
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How often will Microsoft Windows Server 2003 perform an automatic backup of the DHCP database if the default settings are not altered?
a. Every 24 hours b. Every 30 minutes c. Every 120 minutes d. Every 60 minutes |
d. Every 60 minutes
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Which DHCP management process is used to recover unused space in the DHCP database?
a. Reconciling b. Compacting c. Restoring d. Removing |
b. Compacting
EXPLANATION: To recover used space in the Dynamic Host Configuration Protocol (DHCP) database, the DHCP database is dynamically compacted. |
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You have been asked to perform an offline compaction of the DHCP database on one of your Microsoft Windows Server 2003 DHCP servers. What command-line tool would you use to accomplish this?
a. The Compact utility b. The Compress utility c. The Jetpack utility d. The Dhcpcompress utility |
c. the jetpack utility
EXPLANATION: Windows Server 2003 uses the Jetpack utility to perform offline compaction of the Dynamic Host Configuration Protocol (DHCP) database. (Discussion starts on page 43.) |
