Q & A on Minimum Frame SIze for 802.3 Q: Thanks for ur reply on the frame that is 60 bytes. Yes, u are right. The network monitoring software didn't display the last 4 bytes of FCS. Lately, i managed to capture a 802.3 frame with a length of 18 bytes. It seem to have only 4 bytes of data frame. 6+6+2+4 =18. Really curious that why it was not stuffed to have min of 46 data bytes? A: The answer could once again result from the difference between the internal and external formats. Where you using 802.1 length encoding? If so, perhaps the program you are using to display the frames only shows the valid data and omits the zero padding that is used when the frame is transmitted.