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?
A DHCP reservation is linked to a device's MAC address. When a device requests an IP address, the DHCP server checks if that device's MAC address has an associated reservation and, if so, assigns the predefined IP address. Other options do not serve as unique identifiers for setting up a DHCP reservation. Hostnames can change and are not unique identifiers on a network. Subnet masks and default gateways are not unique to individual devices and do not facilitate the reservation process. Serial numbers are not used by DHCP for assigning IP addresses.
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What is a MAC address and why is it important for DHCP reservations?
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How does a DHCP server handle requests if there are no reservations set?