Your network contains two servers named Server1 and Server2 that run Windows Server 2012 R2. Server1 is a
DHCP server that is configured to have a scope named Scope1. Server2 is configured to obtain an IP address
automatically.
In Scope1, you create a reservation named Res_Server2 for Server2.
A technician replaces the network adapter on Server2.
You need to ensure that Server2 can obtain the same IP address.
What should you modify on Server1?

A.
The Name Protection settings of Scope1

B.
The MAC address of Res_Server2

C.
The Advanced settings of Res_Server2

D.
The Network Access Protection Settings of Scope1

Explanation:
DHCP reservations are given based upon MAC address (at least on IPv4/DHCPv4).
For clients that require a constant IP address, you can either manually configure a static IP address, or assign a
reservation on the DHCP server. Reservations are permanent lease assignments that are used to ensure that a
specified client on a subnet can always use the same IP address. You can use DHCP reservations for hosts
that require a consistent IP address, but do not need to be statically configured. DHCP reservations provide a
mechanism by which IP addresses may be permanently assigned to a specific client based on the MAC
address of that client. The MAC address of a Windows client can be found running the ipconfig /all command.
For Linux systems the corresponding command is ifconfig -a. Once the MAC address has been identified, the
reservation may be configured using either the DHCP console or at the command prompt using the netsh tool.
Media access control (MAC) address authorization functions in the same way as automatic number
identification (ANI) authorization, but it is used for wireless clients and clients connecting to your network by
using an 802.1X authenticating switch. Since the network adapter was replaced, you need to modify the MAC
address on Server1 to ensure that Server2 can obtain the same IP address.
http://technet.microsoft.com/en-us/library/dd197535%28v=WS.10%29.aspx