What should you do?
You have a DHCP server named Server1.
Server1 has an IPv4 scope that serves 75 client computers that run Windows 10.
When you review the address leases in the DHCP console, you discover several leases for devices that you do not recognize.
You need to ensure that only the 75 Windows 10 computers can obtain a lease from the scope.
What should you do?
A . Run the Add-DhcpServerv4ExclusionRange cmdlet.
B . Create and enable a DHCP filter.
C . Create a DHCP policy for the scope.
D . Run the Add-DhcpServerv4OptionDefinition cmdlet.
Answer: A
Explanation: https://technet.microsoft.com/en-us/library/jj590721(v=wps.630).aspx
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A and D would do nothing for the scenario, you could filter with MAC addresses
or establish a policy, options for policy are
Vendor Class
User Class
MAC address
Client Identifier
Relay Agent Information
An exclusion range wouldn’t help as the unknown devices would still get IPs (only different ones with respect to the exclusion range).
A DHCP filter though could use MAC address filtering.