CompTIA Security+ (SY0-501) — Question 1040

Which of the following is the MAIN disadvantage of using SSO?

Answer options

• A. The architecture can introduce a single point of failure.
• B. Users need to authenticate for each resource they access.
• C. It requires an organization to configure federation.
• D. The authentication is transparent to the user.

Correct answer: A

Explanation

The correct answer, A, highlights that SSO can create a single point of failure, meaning if the SSO service goes down, access to all associated resources is lost. Option B is incorrect because SSO reduces the need for multiple authentications. Option C is also incorrect since federation configuration is often seen as a requirement rather than a disadvantage. Option D is not a drawback, as transparent authentication is generally seen as a benefit.