pls can u aswer this question

Question

Suppose a source device need to send an IP message with 21,000 bytes. Suppose that a local connection has a MTU of 576 bytes. How many fragments are required to send the message over the network?

Answer 1

Considering the header size of IP fragment is $20$ B
MTU = $576$ B out of which $20$ B will be for header
So maximum data we can send  = $576 – 20$ = $556$ B and since this is not multiple of $8$ we will consider nearest multiple of $8$ and $\leq 556$ i.e. $552$ B

Since you mentioned in question size of IP packet is $21000$ B, first we will delete the IP header from it to get the data = $21000-20 = 20980$ B
So number of fragments = $\lceil{\frac{20980}{552}}\rceil = 39$