How is bandwidth measured?
• Actual bandwidth Usage – Some hosts will bill you for the total transfer sent to your server and from your server. • 95th Percentile – 95th percentile disregards the top 5% of bandwidth measurements over the billing period. Thus bandwidth spikes which are short in duration are disregarded. Large attachments in an email could cause a bandwidth spike which falls into the top 5%. • Note if your hosting provider has a flat network (i.e. Does not user Dedicated VLANs) your bandwidth usage will be increased by another server on the same switch if it broadcasts data. A good example of when this happens is when a server is compromised for a virus like the SQL slammer virus.