ISC CISSP Question Answer

CISSP Question 7

A confidential number used as an authentication factor to verify a user's identity is called a:

A. PIN
B. User ID
C. Password
D. Challenge

Correct Answer: A
Explanation/Reference:PIN Stands for Personal Identification Number, as the name states it is a combination of numbers.
The following answers are incorrect:
User ID This is incorrect because a Userid is not required to be a number and a Userid is only used to establish identity not verify it.
Password. This is incorrect because a password is not required to be a number, it could be any combination of characters. Challenge. This is incorrect because a challenge is not defined as a number, it could be anything.