City-hall PCs receive a DHCP address in the correct subnet and a correct mask, and they have no default gateway and no DNS server. The scope options are blank. Which change supplies what is missing?
Select an answer to reveal the explanation.
Short Explanation
The PCs got a street number and no city and no phone book. You fill in the DHCP router option and the DNS server option so the next lease includes a gateway and a resolver. They are already receiving addresses, so another relay, a shorter lease, or a reservation that still omits those options does not fill the blank.
Full Explanation
A DHCP offer can carry the address, the mask, and options. The router option is the gateway. The DNS option is the resolver. These PCs already have an address and a mask, and the scope options are blank, so the server never sent either one. Configuring those options and renewing supplies the missing fields. A relay helps a client on another subnet reach the server. These PCs are already receiving leases, so a relay does not fill blank options. A shorter lease changes duration and adds nothing to the offer. A reservation is the tempting twin because it can carry its own options. A reservation that only pins the address, and still leaves the router and DNS options blank, repeats the same hole. Exam caveat: if one PC is reserved, check that reservation's options as well as the scope. Operational check: renew a test PC, confirm the gateway and the DNS server match the options, and confirm it can resolve a name and reach a host beyond the subnet. Renew twice if the first renewal still shows the old blank options cached on the PC.