Describe the major structure of an IP packet and explain the main functions of the IP headers.

a$.$

An IP packet consists of an IP header and an IP payload. The IP payload may be an entire TCP packet passing down from the TCP layer, or a fragmented TCP packet $($when the TCP packet is too long to be enclosed in one IP packet$).$ The IP header is responsible for forwarding the IP packet to the next router, eventually to the destination computer.

b$.$

An IPv$4$ packet contains a $32-$bit source IP address of the sending computer and a $32-$bit destination IP address of the computer the data is meant to send to$.$

c$.$

All of the above

d$.$

None of the above