Your network contains three servers that run Windows Server 2012 R2. The servers are configured
as shown in the following table.

Server3 is configured to obtain an IP address automatically.
You need to prevent Server3 from receiving an IP address from Server1.
What should you create on Server1?

A.
A reservation

B.
A filter

C.
A scope option

D.
An exclusion

Explanation:
A)
For clients that require a constant IP address
B)
Filter to exclude MAC address of Server3
C)
Range of allowed IP’s to be assigned
D)
Exclude range of IP’s
MAC address based filtering ensure that only a known set of devices in the system are able to obtain
an IPAddress from the DHCP Reservation and Exclusion, two incredibly different concepts. An
exclusion is an address or range of addresses taken from a DHCP scope that the DHCP server is not
allowed to hand out. For example, if you have set a DHCP server to exclude the address range
192.168.0.1-192.168.0.10 then the only way a computer on your network would get an address of
192.168.0.4 would be if you assigned it statically on that machine. This is because DHCP knows NOT
to give this range of IP addresses out.
A reservation is a specific IP addresses that is tied to a certain device through its MAC address. For
example, if we have a workstation on the network that requires a certain IP address, but we don’t
want to go through to trouble of assigning it statically, then we can create a reservation for it. So if
the MAC address of the NIC on the computer is AA-BB-00FF-CC-AA and we want it to maintain the IP
address of 192.168.0.100 then we would create a DHCP reservation under that particular scope
saying that the IP address 192.168.0.100 is reserved only for the MAC address AA-BB-00-FF-CC-AA.
Reference: http://technet.microsoft.com/en-us/magazine/ff521761.aspx