Late Collision is a type of collision found in the CSMA/CD protocol standard. If an collision error occurs after the first 64 octets of data have been sent by the sending station, a late collision is said to have occurred. Importantly, late collisions are not re-sent by the NIC unlike collisions occurring before the first 64 octets; it is left for the upper layers of the protocol stack to determine that there was loss of data.