title: Calculate the probability of undetected errors for the whole file (not packets) in the CRCs
body: <p>If we have a large file, I want to know how this will affect the probability of undetected errors, especially in CRCs.
  I know that undetected error rate (packet or chunk) is= BitR* BER * 0.5^k which K is the FSC of the CRC. in CRC 32 k is 31,</p>
  <p>from this equation and picture below, the packet size is not effecting the probability of undetected error for different packet sizes. Suppose we have 1,000,000 packets each with 2^(-32) probability of undetected error, how can I calculate the probability of undetected error for the entire 1Petabyte file?</p>
  <p><a href="https://i.stack.imgur.com/t2Cgp.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/t2Cgp.png" alt="the upper bound is always the same" /></a></p>