A technician needs to set aside addresses in a DHCP pool so that certain servers always receive the same
address. Which of the following should be configured?

A.
Leases

B.
Helper addresses

C.
Scopes

D.
Reservations

Explanation:
A reservation is used in DHCP to ensure that a computer always receives the same IP address. To create a
reservation, you need to know the hardware MAC address of the network interface card that should receive the
IP address.
For example, if Server1 has MAC address of 00:A1:FB:12:45:4C and that computer should always get
192.168.0.7 as its IP address, you can map the MAC address of Server1 with the IP address to configure
reservation.