A: 95th percentile billing allows a customer to have a short (less than 36 hours, given a monthly billing period) burst in traffic without overage charges. 95th percentile means that 95% of the time, the usage is at or below the allowed amount. Conversely, 5% of the traffic may be bursting above this rate, and up to the limit of the port speed, without incurring any surcharges or capping.