You want to add a security layer that maintains strict control over the apps your users can use. Which of the following best fulfills this requirement?

You want to add a security layer that maintains strict control over the apps your users can use. Which of the following best fulfills this requirement?

• Lockout
• Encryption
• White listing
• Black listing 

EXPLANATION

 Whitelisting is the practice of identifying entities that are provided a particular privilege, service, mobility, access or recognition. Entities on the list will be accepted, approved and/or recognized. Whitelisting is the reverse of blacklisting, the practice of identifying entities that are denied, unrecognised, or ostracised.