Priority long-lived connections can be booked well in advance long-lived connections between major cities or data centers carry traffic from many users, so it is justifiable for them to have preemptive priority over the short-lived onesPriority • long-lived connections can be booked well in advance. • long-lived connections between major cities or data centers carry traffic from many users, so it is justifiable for them to have preemptive priority over the short-lived ones. 15