Question 19

1. In wireless communication, data received at the receiver is the same as sent is ensured by __.

   	A.	data confidentiality
   	B.	access control
   	C.	data integrity
   	D.	authentication

1 points

Question 20

1. Which of the following is not a focus of security service?

   	A.	Encapsulation
   	B.	Authentication
   	C.	Data confidentiality
   	D.	Nonrepudiation

1 points

Question 21

1. Authentication can be based on

   	A.	All the above
   	B.	Where you are
   	C.	Who you are
   	D.	Something you know