TCP/IP Question:

IP really isn't very fussy about how its packets are transported.
The details of how an IP packet is carried over a particular kind
of network are usually chosen to be convenient for the network
itself. As long as the transmitter and receiver observe some
convention that allows IP packets to be differentiated from any
other data that might be seen by the receiver, then IP can be used
to carry data between those stations.

Ip is just a protocol which used to carry data,packets over the network in the manner which the n/w components can understand.
ip is a identity of n/w devices