A security administrator must implement a SCADA style network overlay to ensure secure remote management of all network management and infrastructure devices. Which of the following BEST describes…

Question

Options

• AA physically isolated network that allows for secure metric collection.
• BA physically isolated network with inband management that uses two factor authentication.
• CA logically isolated network with inband management that uses secure two factor authentication.
• DAn isolated network that provides secure out-of-band remote management.

• A
  12% (5)
• B
  7% (3)
• C
  2% (1)
• D
  78% (32)

Explanation

Out-of-band (OOB) management means that administrative traffic travels over a separate, dedicated network path that is physically or logically isolated from the production data network. This is the core rationale for a SCADA-style management overlay: if the production network is compromised, attackers cannot reach the management plane, and administrators can still access and remediate devices. Option A omits the management aspect and incorrectly implies physical isolation alone is sufficient. Option B describes in-band management (still shares the production network). Option C is logically isolated with in-band management, which is weaker than true OOB. Option D correctly captures both isolation and out-of-band remote management.

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