It is normal to see the TCP retransmission most of time which will cause lots of different network issue, packet drop etc. Today let’s have a short discussion about improper size of MTU caused packet drop during the transmission.
PDU Protocol Data Unit (describes a message at some protocol layer; sometimes used interchangeably and informally with packet, frame, datagram, segment, or message)
MTU Maximum Transmission unit – There is a limit on the size of the frame available for carrying the PDUs of higher-layer protocols in many link-layer networks such as Ethernet. For the Ethernet, usually limits the number of payload bytes to about 1500.