Which statement describes the primary purpose of a VLAN?

• A. To segment networks by creating separate broadcast domains
• B. To unify all broadcast domains into one
• C. To provide IP address assignment
• D. To manage DNS

Answer: (A)

VLANs create separate broadcast domains at the data link layer by grouping switch ports into logical networks. When devices share a VLAN, broadcasts stay within that VLAN and don’t cross into other VLANs unless a router is configured to route between them. This segmentation reduces broadcast traffic, improves security by limiting who can see which traffic, and simplifies network management by grouping devices by function or department. So, the primary purpose is to segment networks by creating separate broadcast domains. The other options describe services like IP address assignment or DNS, which are not the VLAN’s function, and unifying all broadcast domains would defeat the VLAN’s purpose.