A badge printer must keep one address from DHCP and must still learn the gateway and DNS server from the scope. Which DHCP feature does that?
Select an answer to reveal the explanation.
Short Explanation
You save one seat with the printer's name on it, and the waiter still brings the same bread and water as everyone else. That saved seat is a DHCP reservation. An exclusion removes the seat, a hand-typed address skips the waiter, and a mail record does not assign addresses.
Full Explanation
A DHCP reservation maps a MAC address to one IP address and still delivers the scope options, including the gateway and DNS. The badge printer needs a stable address and those options, so a reservation fits. An exclusion keeps an address from being leased at all. It does not hand the printer options. A static address configured only on the printer never asks DHCP, so the scope's gateway and DNS are not applied by the server. An MX record names a mail host in DNS. It does not create a DHCP reservation. Exam caveat: the reserved address must sit in the scope and must not also be excluded, or the server will refuse to offer it. Operational check: create the reservation for the printer's MAC, renew the lease, and confirm the address, gateway, and DNS all arrive. Renew the printer lease after the reservation is saved, and check that the address, the gateway, and the DNS server all arrived together. Ping the reserved address from another host and confirm it answers only while the printer is on.