How to estimate server bandwidth requirements

Pc=pv/t*c*t*f
Where the PC is the number of concurrent, T is the observed time, that is, the length of time to produce PV, such as 14 hours a day produced 200,000 concurrent, then the formula t=14*60*60 seconds, pv=20 million. C is the number of HTTP connections requested by a single page, T is the duration of the connection, generally take an estimate of the length of time the user waits for a connection, for example, the user waits 5 seconds on average to find the Web page is not open, then this t can take 5 seconds.
F represents a multiple of PV relative to average PV in extreme cases.

bw=ps*pc*8bit/byte*r/t
BW is the bandwidth size, PS is the average size of the page, the PC is the concurrency number, 8bit/byte is the unit conversion, 1byte=8bit,r is a factor, representing the extreme situation, the function is similar to the F-factor in the concurrency estimate. T refers to the average user can tolerate the maximum waiting time, such as 20 seconds within the page is not fully open, the user will leave, then T take 20 seconds. Similarly, this formula estimates the bandwidth requirements of a single server, or the total bandwidth requirements of a Web site.

How to estimate server bandwidth requirements