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312-50V12 · Question #173

As a cybersecurity analyst at TechSafe Inc., you are working on a project to improve the security of a smart home system. This IoT-enabled system controls various aspects of the home, from heating…

The correct answer is D. Advise using a dedicated network for the smart home system, separate from the home's main Wi-. To prevent a compromised IoT device from affecting the entire smart home system, network segmentation is the most effective strategy. This isolates the IoT devices, limiting the potential impact of a breach to that specific segment.

Submitted by yousef_jo· Mar 4, 2026Wireless Network, Mobile, IoT, and OT Hacking

Question

As a cybersecurity analyst at TechSafe Inc., you are working on a project to improve the security of a smart home system. This IoT-enabled system controls various aspects of the home, from heating and lighting to security cameras and door locks. Your client wants to ensure that even if one device is compromised, the rest of the system remains secure. Which of the following strategies would be most effective for this purpose?

Options

  • ARecommend using a strong password for the smart home system's main control panel.
  • BSuggest implementing two-factor authentication for the smart home system's mobile app.
  • CPropose frequent system resets to clear any potential malware.
  • DAdvise using a dedicated network for the smart home system, separate from the home's main Wi-

How the community answered

(22 responses)
  • A
    23% (5)
  • B
    14% (3)
  • C
    5% (1)
  • D
    59% (13)

Why each option

To prevent a compromised IoT device from affecting the entire smart home system, network segmentation is the most effective strategy. This isolates the IoT devices, limiting the potential impact of a breach to that specific segment.

ARecommend using a strong password for the smart home system's main control panel.

Using a strong password for the control panel improves authentication but does not prevent a compromised IoT device, such as a smart bulb, from potentially attacking other devices on the same flat network.

BSuggest implementing two-factor authentication for the smart home system's mobile app.

Implementing two-factor authentication for the mobile app enhances user access security but does not provide network-level isolation between IoT devices themselves, leaving them vulnerable to lateral movement if one is compromised.

CPropose frequent system resets to clear any potential malware.

Proposing frequent system resets is a reactive measure for remediation and does not proactively prevent the spread of malware or limit the blast radius of a compromised device within the network.

DAdvise using a dedicated network for the smart home system, separate from the home's main Wi-Correct

Advising a dedicated, separate network for smart home devices implements network segmentation. This isolates the IoT devices from the main home network, ensuring that if one smart device is compromised, the attacker's access is contained to that segment and cannot easily spread to other, potentially more sensitive devices on the main network.

Concept tested: Network segmentation for IoT security and blast radius containment

Source: https://learn.microsoft.com/en-us/azure/architecture/framework/security/design-network-segmentation

Topics

#IoT security#network segmentation#smart home security#defense in depth

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