(ISC)2 Certified in Cybersecurity Practice Exam

What is considered the most important control to apply to smart devices?

1. Intrusion detection

2. Application firewalls

3. Wrappers

4. Network segmentation

The correct answer is: Network segmentation

Network segmentation is considered the most important control to apply to smart devices due to its ability to enhance security by isolating different parts of a network. Smart devices can often be vulnerable to various forms of attacks, making them potential entry points for unauthorized access into a larger network. By segmenting a network, sensitive data and critical systems are separated from less secure devices, thereby limiting the impact of a potential breach. This control limits the ability of attackers to move laterally through a network, as they would have to navigate distinct segments and potentially face additional security measures at each junction. It also allows for more efficient monitoring and management of network traffic, facilitating quicker detection of any unusual activity originating from smart devices. While other options like intrusion detection, application firewalls, and wrappers are relevant security measures, they primarily focus on monitoring or protecting the application layer and may not provide the same level of network isolation that segmentation offers. Consequently, in environments with many smart devices, network segmentation stands out as a foundational approach to enhancing overall security posture.