Differences of these communications

[rama1001]

Hi,
this may be the stupid question for you but its important for me to understand difference between these. I am making an application which requires hex communication between master and slave but the problem is with me that i keep on doing string coomunication eventhough my instructor said too many times. The only reason for that is lack of grasping the differnce between them. May be, i am communicating with hex string but i need to know the differnce between string communication and byte communication as well as hex communication.
Can anyone explain me.. please..

 

[jsgruszynski]

Hex value: 4E

Byte bits: 01001110

String bits: 00110100 01000101
'4' 'E'