A guest Wi-Fi scope runs out of addresses because visitors' leases last all day after the visitors leave. Which DHCP change returns addresses sooner?
Select an answer to reveal the explanation.
Short Explanation
Visitors take an address and their reservation of it outlives the visit. You shorten the lease so those addresses come back. Making the lease longer, publishing a mail record, or adding a tunnel does not free the pool sooner.
Full Explanation
A DHCP lease is how long a client may keep an address. Leases that last all day after a visitor leaves hold addresses the scope needs. Shortening the lease returns them to the pool sooner. Lengthening the lease keeps them out longer, which is the opposite of the goal. An MX record names a mail host. It does not expire leases. A VPN is a protected path. It does not shrink a guest scope or time out addresses. Exam caveat: a very short lease increases DHCP traffic. Pick a time that matches the visit, not a time so short that clients renew constantly. Operational check: shorten the guest lease, watch addresses return after visitors leave, and confirm new visitors still receive a lease. Watch the scope for a day and confirm visitors' addresses return after they leave.