iSACA Cybersecurity Fundamentals Certification Practice Exam

What is a Virtual Local Area Network (VLAN) primarily used for?

1. Grouping devices on one or more logically segmented LANs

2. Providing secure connections to external networks

3. Enabling encryption of all transmitted data

4. Maximizing the speed of wireless connections

The correct answer is: Grouping devices on one or more logically segmented LANs

A Virtual Local Area Network (VLAN) is primarily utilized for grouping devices into one or more logically segmented local area networks, regardless of their physical location. This logical segmentation allows for efficient management of network traffic, enhancing network performance and security by isolating traffic within distinct broadcast domains. By creating VLANs, network administrators can efficiently manage how devices communicate with one another based on function, department, or project. This means that even if devices are on different physical switches, they can be part of the same VLAN and communicate as if they were on the same network. This can also aid in organizing network resources and enforcing security policies tailored to specific groups. In contrast, the other options address purposes that VLANs do not primarily serve. Providing secure connections to external networks involves different technologies, such as Virtual Private Networks (VPNs). Encryption of transmitted data is typically handled at the application or transport layer rather than through VLAN configuration. Finally, maximizing the speed of wireless connections pertains to wireless access methods, not the logical structure of a wired or wireless network through VLANs.