What is the primary purpose of a VLAN (Virtual Local Area Network)?

The primary purpose of a VLAN (Virtual Local Area Network) is to separate devices logically instead of physically. A VLAN allows network administrators to group devices that are on different physical networks into the same logical network. This logical separation allows for improved organization, security, and management of network resources without needing to change the physical layout of the network. Devices in the same VLAN can communicate with each other as if they were on the same physical network, regardless of their actual physical locations, allowing for greater flexibility in network design.

This logical segmentation helps in limiting broadcast traffic, enhancing security by isolating sensitive data, and making it easier to manage different departments or functions within an organization. By using VLANs, organizations can create a more efficient network while maintaining control over communications and access.

The other options do not accurately reflect the core functionality of VLANs. Physical separation of networks refers to the use of distinct physical infrastructure rather than logical segmentation. VLANs do not necessarily reduce the number of switches needed; rather, they can exist on the same switch. The assertion that VLANs increase the range of broadcast domains is also misleading, as VLANs are designed to limit broadcasts, not expand their range.