What is the minimum number of IP fragments required to send a 1 MB mp3 fi le over a fast Ethernet connection? (Hint: Ignore headers above the IP layer; a maximum IP fragment consists of a 20-byte...

What is the minimum number of IP fragments required to send a 1 MB mp3 fi le over a fast Ethernet connection? (Hint: Ignore headers above the IP layer; a maximum IP fragment consists of a 20-byte header and a 1480-byte payload.)

When reassembling fragments, how does the receiver know whether two fragments belong to the same IP packet? How does it know whether the size of each fragment is correct?