The default value at which a refresh interval (an interval a sec. server check for zone updates) is 15 minutes.
If this value is increased, the network traffic is reduced. In the eventuality that the refresh interval expires, the secondary zone will contact the primary zone and request it to initiate the zone transfer.
Answer:
dominoes, fans, PVC pipe, magnets, duct tape, marbles, cups or bowls, miniature toy cars, paper towel tubes, string.
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dominó, abanicos, tubos de PVC, imanes, cinta adhesiva, canicas, tazas o cuencos, carros de juguete en miniatura, tubos de toallas de papel, cuerdas.
Explanation:
An Object Class. Hopefully this answer is right.
O AND U which spells ABOUT