Cyber Fundamentals Block 3 Practice Test

A VLAN (Virtual Local Area Network) creates a single broadcast domain by grouping devices logically at the data link layer. In a switch-based network, broadcasts are confined to the devices within the same VLAN. By assigning ports across one or more switches to the same VLAN, you make all those devices share one broadcast domain, regardless of their physical location. If devices are in different VLANs, their broadcasts won’t reach each other unless a router or layer-3 device routes between the VLANs. The other options don’t describe this logical grouping of devices into one broadcast domain: a LAN is a broader geographic concept, a VPN is about secure remote access, and a WAN covers wide geographic areas.