A network technician needs to ensure that a server receives the same IP address from the DHCP server every time it reboots. To achieve this, the technician decides to use a DHCP reservation. Which of the following identifies the unique piece of information required by the DHCP server to create a reservation for the server?
The server's default gateway
The server's host name
The server's serial number
The server's subnet mask
The server's MAC address