All of the following are true about the Open System Interface (OSI) protocol except

	A. within one node different layers communicate with other layers at that node
	B. one protocol is developed and applied to all the OSI layers
	C. specific layers are dedicated to hardware tasks and other layers are dedicated to software tasks
	D. layers at each node communicate logically with their counterpart layers across nodes

A cost-benefit analysis is a part of the detailed

	A. operational feasibility study
	B. schedule feasibility study
	C. legal feasibility study
	D. economic feasibility study

A message that is made to look as though it is coming from a trusted source but is not is called

	A. a denial of service attack
	B. digital signature forging
	C. Internet protocol spoofing
	D. URL masquerading