VLAN benefits include

• A. Decreased security and limited scalability
• B. Increased security, flexibility and scalability, and removing geographical limits
• C. Increased latency and reduced throughput
• D. Only used for wireless networks

Answer: (B)

VLANs create separate broadcast domains at the switch level, which helps keep traffic contained and accessible only to those within the same group. This containment strengthens security because devices in one VLAN don’t automatically see traffic from another VLAN unless a router or layer-3 device is used to route that traffic.

They also bring flexibility: you can group devices by department, function, or project regardless of their physical location, and you can move or reassign devices without rewiring cables. Scalability follows from using trunk links that carry multiple VLANs across switches, so adding more switches or expanding the network doesn’t require reconfiguring the entire topology.

Span across locations is a key benefit too—the same VLAN can extend across different physical sites, giving you a single logical network segment even if devices are geographically separated. In short, VLANs boost security, provide flexible and scalable network design, and remove geographical constraints on how you group devices.

The other statements don’t fit because VLANs do not inherently decrease security, they do not cause increased latency and reduced throughput as a primary benefit, and they’re not limited to wireless networks.