Analyse the header of the IPv$4$ datagram shown in Figure $6\mathrm{.}1$ in order to solve the

following problems:

$($i$)$ Prove using the information available there that the IPv$4$ datagram cannot carry

data payload obtained from the Transport Layer in a TCP segment which is larger

than $65,495$ bytes.

Figure $6\mathrm{.}1$ The IPv$4$ datagram header.

$($ii$)$ The value of IHL field in a particular IPv$4$ datagram is $12.$ How many Option

bytes are present in the datagram?

$($iii$)$ Explain how the datagram security is implemented in IPv$4$ protocol.

$($iv$)$ Explain what is the purpose and the main functions of the Options field in IPv$4?$