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You have a DHCP server that runs Windows Server 2008 R2. You restore the DHCP database by using a recent backup. You need to prevent DHCP clients from receiving IP addresses that are currently in use on the network.
What should you do?
A. Add the DHCP server option 15.
B. Add the DHCP server option 44.
C. Set the Conflict Detection value to 0.
D. Set the Conflict Detection value to 2.
Correct Answer: D
Explanation/Reference:
Correct answer(s): D
http://technet.microsoft.com/en-us/library/cc737924(v=ws.10).aspx
To enable address conflict detection
Open DHCP.
In the console tree, click the applicable DHCP server.
Where?
DHCP/applicable DHCP server
On the Action menu, click Properties. Click the Advanced tab.
For Conflict detection attempts, type a number greater than 0 (zero) and less than six, and then click OK.
The number you type determines how many times the DHCP server tests an IP address before leasing it 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 increases the load on the server. A value of no greater than two (2) for ping attempts is recommended.