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CompTIA Security+ study material · question 339 of 611

What does limiting the number of concurrent sessions per account achieve?

  1. It removes the need for a session lock
  2. It prevents password guessing
  3. It makes credential sharing visible and caps what a stolen credential can do in parallel
  4. It enforces least privilege
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Answer: C. It makes credential sharing visible and caps what a stolen credential can do in parallel

Two simultaneous sessions from different places is itself a signal, and the limit bounds parallel abuse.

Source: NIST SP 800-53 Rev. 5 (NIST) — SP 800-53r5 › AC-10 Concurrent Session Control

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