i$)$ Describe the forms of data units for the $5-$layer TCP$/$IP model. $(9$ points$)$

ii$)$ Given the following IP source and destination addresses $($in Hexadecimal format$)$

which are identified in the IP Header $($as specified in Appendix B$)$:

IP source address: $817$E $7$B $01$

IP destination address: $817$E $7$B $24,$

convert the addresses to standard dotted$-$decimal format.