$(18$ marks$)[$Checksum $($Learning Outcome $3)]$

Compute the Internet checksum for a $18-$byte data chunk containing the following in

sequence: $($i$)7$ bytes of pattern $10101011$; $($ii$)$ IP address $222\mathrm{.}59\mathrm{.}6\mathrm{.}131$; $($iii$)$ IP address

$115\mathrm{.}77\mathrm{.}223\mathrm{.}54$; $($iv$)8$ bits representing the value of $43$ ; $($iv$)2$ bytes representing value

$0x86$ DD$.$Compute the Internet checksum for a $18-$byte data chunk containing the following in

sequence: $($i$)7$ bytes of pattern $10101011$; $($ii$)$ IP address $222\mathrm{.}59\mathrm{.}6\mathrm{.}131$; $($iii$)$ IP address

$115\mathrm{.}77\mathrm{.}223\mathrm{.}54$; $($iv$)8$ bits representing the value of $43$; $($iv$)2$ bytes representing value

$0$x$86$DD