you manage a network with two locations. the main office is in phoenix, and a branch office is in tulsa. srv1 is a dns server in phoenix. srv1 holds the primary zone for the eastside.local zone. to improve name resolution requests in the branch office, you place a secondary copy of the zone on srv5 in the tulsa location. due to recent expansion, you are adding more servers to the phoenix location. for each server, you manually create the a and ptr records. you find that after you add the server, computers in the tulsa location are unable to contact the new servers for up to 10 minutes. you want to make sure that hosts in tulsa can contact these servers using dns as quickly as possible. what should you do?