CompTIA Network+ Practice Test

What is a characteristic of Virtual Local Area Networks (VLANs)?

1. They connect devices physically only

2. They connect devices logically instead of physically

3. They require additional hardware for configuration

4. They can operate only in a single broadcast domain

The correct answer is: They connect devices logically instead of physically

A Virtual Local Area Network (VLAN) is characterized by its ability to connect devices logically instead of physically. This logical separation allows devices on the same physical network to be grouped together in different broadcast domains, despite being on different segments of the network. By using VLANs, network administrators can segment networks for better performance, security, and management without needing to rewire the physical network infrastructure. The clear distinction between physical and logical connections highlights the flexibility VLANs provide. For instance, devices can be added to a VLAN regardless of their physical location in the network, making it easier to manage resources among users in different geographic locations or departments, all while maintaining appropriate security policies. The other options do not accurately represent how VLANs function. Physical-only connections do not reflect the essence of VLANs, which actively use logical configurations instead of relying solely on the physical layout. Additionally, while some VLAN configurations may involve enhanced switches that support VLAN tagging, they do not inherently require additional hardware for basic VLAN functionality. Lastly, VLANs operate across multiple broadcast domains, enabling communication and segmentation between diverse groups of devices rather than being confined to a single broadcast domain.