Your network contains a server named Server1. Server1 has the DHCP server role installed and
contains multiple scopes. You restore the DHCP database and discover that the active IP address
leases are not displayed. You need to ensure that all IP address leases are displayed. What should
you do?

A.
Reconcile all of the scopes.

B.
Run jetpack.exe dhcp.mdb temp.mdb.

C.
Restart the DHCP Server service.

D.
Authorize Server1.

Explanation:
Recovery: Restoring from Backup

If the DHCP server database becomes corrupted or is lost, simple recovery is possible by replacing
the server database file (Dhcp.mdb), located in the % SystemRoot %\System32\Dhcp folder, with a
backup copy of the same file. You can then perform a simple file copy to overwrite the current
corrupted database with a backup copy of the same file.
If DHCP Manager has been used previously to enable backup, you can obtain the backup copy of the
server database file located in the % SystemRoot %\System32\Dhcp\Backup folder. As an option,
you can also choose to restore the Dhcp.mdb file from a tape backup or other backup media.
Before restoring the database file from backup, the DHCP service must first be stopped. Once you
have copied the backup file to the % SystemRoot %\System32\Dhcp folder from your preferred
backup source, you can restart the DHCP service.
To stop the DHCP server service, type the following at a command prompt:
net stop dhcpserver Once the DHCP service has been stopped, the following procedure can be used
to safely restore a backup copy of the database from either backup media or the DHCP service
backup folder.
First, move the files from your existing DHCP folder to a different folder location, such as \Olddhcp.
Be careful to keep the DHCP folder structure intact. For example, type the following set of
commands at a command prompt to perform this step:
md c:\Olddhcp move % SystemRoot % \system32\DHCP\*.* C:\Olddhcp
Next, remove the corrupted server database file. This can also be done at the command prompt:
del % SystemRoot % \system32\DHCP\Dhcp.mdb
You can then copy the backup database file into the DHCP service folder. The path to be used when
performing the actual copy operation varies (as shown in Table 4.15), depending on the specific
server version of Windows running on the computer where the DHCP database file is being restored.
http://technet.microsoft.com/en-us/library/cc958954.aspx