Peak Information Rate (Paperback)

High Quality Content by WIKIPEDIA articles The Peak Information Rate is a burstable rate set on routers and/or switches that allows throughput overhead. Related to Committed Information Rate which is a committed rate speed guaranteed/capped. For example, a CIR of 10 Mbit/s PIR of 12 Mbit/s allows you access to 10 Mbit/s minimum speed with burst/spike control that allows a throttle of an additional 2 Mbit/s. (This allows for data transmission to "settle" into a flow.) Maximum Information Rate (MIR) in reference to Broadband Wireless refers to maximum bandwidth the Subscriber Unit will be delivered from the wireless access point in kbit/s. Burstable billing is a method of measuring bandwidth based on peak utilization. It also allows usage to exceed a specified threshold for brief periods of time without the financial penalty of purchasing a higher Committed Information Rate (CIR, or commitment) from an Internet service provider (ISP). Most ISPs use a five minute sampling and 95% utilization when calculating usage.