title: CRC error detection and undetected error probabilities
body: <p>If we have a large file, let 's say 1 Petabyte, <strong>what's the best CRC that can detect all the errors?</strong> Is  32bits enough?</p>
  <p>I also heard that <code>undetected error rate (packet or chunk) is= BitR* BER * 0.5^k</code> which K is the FSC of the CRC. in CRC 32 k is 31</p>
  <p>I want to know if we have bigger packets or smaller ones <strong>how this will affect the CRC</strong>... from this equation, it is not affecting at all.</p>