Which statement about VLANs is true in terms of traffic management?

Which statement about VLANs is true in terms of traffic management?

• A. Increases broadcast domains.
• B. Requires updating routing tables continuously.
• C. VLANs segment at Layer 3 traffic management.
• D. Reduces broadcast domains and improves security and traffic management.

Answer: (D)

Creating separate broadcast domains is what VLANs accomplish. By assigning switch ports to a specific VLAN, broadcasts stay within that VLAN and don’t flood devices in other VLANs. This containment reduces overall broadcast traffic and makes network performance more predictable. It also improves security because devices in one VLAN can’t automatically reach devices in another VLAN; you can enforce access control and policies for inter-VLAN communication. When devices in different VLANs need to communicate, inter-VLAN routing is used, typically on a router or Layer 3 switch, which is a Layer 3 task separate from how VLANs segment the network. Therefore, VLANs reduce broadcast domains and enhance traffic management and security, which matches the statement. The other options don’t fit because VLANs do not increase broadcast domains, they operate at Layer 2 rather than Layer 3, and they aren’t about continuously updating routing tables as part of VLAN behavior.

Creating separate broadcast domains is what VLANs accomplish. By assigning switch ports to a specific VLAN, broadcasts stay within that VLAN and don’t flood devices in other VLANs. This containment reduces overall broadcast traffic and makes network performance more predictable. It also improves security because devices in one VLAN can’t automatically reach devices in another VLAN; you can enforce access control and policies for inter-VLAN communication. When devices in different VLANs need to communicate, inter-VLAN routing is used, typically on a router or Layer 3 switch, which is a Layer 3 task separate from how VLANs segment the network. Therefore, VLANs reduce broadcast domains and enhance traffic management and security, which matches the statement. The other options don’t fit because VLANs do not increase broadcast domains, they operate at Layer 2 rather than Layer 3, and they aren’t about continuously updating routing tables as part of VLAN behavior.