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Which of the following is being described?

After Ann, a user, logs into her banking websites she has access to her financial institution mortgage, credit
card, and brokerage websites as well. Which of the following is being described?

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A.
Trusted OS

B.
Mandatory access control

C.
Separation of duties

D.
Single sign-on

Explanation:
Single sign-on means that once a user (or other subject) is authenticated into a realm, re-authentication is not
required for access to resources on any realm entity. The question states that when Ann logs into her banking
websites she has access to her financial institution mortgage, credit card, and brokerage websites as well. This
describes an SSO scenario.

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