The following IPv$4$ packet has been generated from a source host with the following

assumptions: $($I$)$ The fields

interpreted erpreted as servce type. or bits that were not used or reserved are denoted by $0.($II$)$ The $8-$bit field $(2$nd byte of IP header$)$ is

$($III$)$ Time to live field is interpreted as total number of hops. $($

IV$)$ Source and destination IP addresses are considered to be class$-$full or class$-$based

addressing.

$($V$)$ The first $20$ bytes of IP header is shown in Figure as $32-$bit words $($one word per row$).$

$15$ Mar

$01001001$

$01000100$

$0100010100110100$

$11000100$

$00110011010$

$00110100$

$11010011$

$10111101$

$00100110$

$11100110$

$11000110$

Determine:

A$.$ Source IP address, Class of IP address, Network mask in dotted decimal notation

B$.$ Length of data $($in bytes$)$

C$.$ Length of optional headers $($in bytes$)$

D$.$ Length of Header $($in bytes$)$ E$.$ Total number of hops $($in decimal$)$

F$.$ Protocol value $($in decimal$)$ G$.$

Header checksum mentioned in header $($in hexa decimal$)$ H$.$ Fragmentation: Identification no$.($in Decimal$)$