hi, In the Ethernet Encapsulation, (RFC#894), we have * destn. h/w addr (6 Bytes) * src h/w addr (6 Bytes) * frame type (2 Byte) * data (min 46 to max. 1500 Bytes) * CRC (4 Bytes) Where is the length of the frame? If I have only 50 bytes of data, how the receiving ethernet will know that the data size is only 50 bytes? -- mks --