Fragmentation offset doubt.

Question

When calculating fragmentation offset, we try to make the size of frame multiple of 8.

Can someone tell me when to remove bits and make it multiple of 8 and when to pad bits and make it multiple of 8?

By default, do we try to remove bits first or pad bits first ?

Answer 1

It is depend on the situation
1. If it is first fragement  if it is not multiple of 8 in such case remove bit from fragement

2. If it is last pad bit because we have data less than MTU so why we increase unnecessary fragement best option to pad bit.