Layer 2 VLAN switches separate devices into logical networks and forward traffic within each VLAN, while Layer 3 VLAN switches can also route traffic between VLANs using IP addresses. Choose Layer 2 for simpler network segmentation, or Layer 3 when the design needs inter-VLAN routing, multicast handling, or more distributed control over traffic between network segments.

Choose a port count that covers current wired endpoints, PoE devices, and reasonable expansion, while considering rack space and whether the switch will serve an access, distribution, or core role. Select uplink speeds based on inter-switch traffic, VLAN routing, and AV or other high-bandwidth applications, and size switching capacity and PoE budget to handle expected simultaneous traffic without creating a bottleneck.

VLAN switches use access ports to connect end devices that typically belong to one VLAN, while trunk ports carry traffic for multiple VLANs between switches, routers, and other network devices. Tagged traffic includes a VLAN identifier, allowing the switch to keep networks separated as frames move across a trunk, while access ports commonly remove or add tags as traffic enters or leaves the switch.

VLAN switches divide one physical network into separate logical networks for AV devices, security equipment, voice systems, and guest access, with assigned ports or VLAN tags keeping traffic organized. Managed Layer 2 and Layer 3 features can support VLAN configuration, inter-VLAN routing, and traffic controls that help limit unnecessary communication between network segments.