A _____ is a logical subnetwork that groups a collection of devices from the same network switch.

• A. Virtual LAN (VLAN)
• B. Local Area Network
• C. Subnet
• D. Broadcast domain

Answer: (A)

A VLAN, or Virtual Local Area Network, is a logical subnetwork that groups devices into the same broadcast domain regardless of their physical location. It lets devices on a network switch (and even across multiple switches via trunking) behave as if they’re on the same local network, so broadcasts are contained within that group. This is why the description fits a VLAN: it defines a separate, logical subnet at Layer 2 that is used to segment traffic and control broadcast domains without needing separate physical networks.

Local Area Network refers to the entire physical network in a locality, not a logical subnetwork. Subnet is a label for an IP-address-based division at Layer 3, focusing on routing and IP addressing rather than the switch-based segmentation VLAN provides. A broadcast domain is the result of such segmentation; VLANs create and manage those domains, but the term describing the subnetwork itself is VLAN.