When MTU=1000, can transmit IP packet, the total length of 976 + 20=996, the rest were divided into 4 bytes of an IP packet?
Why is 976, not 980? Is alignment problem?

CodePudding user response:

Four is likely to be poor FCS field, FCS is placed on the back of the, so may forget to add

CodePudding user response:

Different way of access, MTU value is different, it depends on your IP packet is based on the way;