Suppose that an initial IP datagram containing $1000$ bytes of data. With reference to Figure Q$9,$ the

data will be sent from Router$-1$ to Router$-4.$ Assume that the IP header is $20$ Bytes and the link

connecting Router$-1$ to Router$-2$ has an MTU of $520$ Bytes, Router$-2$ to Router$-3$ has an MTU of $320$

Bytes, and Router$-3$ to Router$-4$ has an MTU of $270$ Bytes.

Figure Q$9$

For each fragment $($packet$)$ received by the Router$-4,$ provide the fragment length, $$don$$t fragment$$

$($DF$)$ bit, $$more fragment$($MF$)$ bit, and the fragmentation offset.