Virtual local area networks (VLAN) are typically implemented using which type of device?

A switch is the correct choice for implementing virtual local area networks (VLANs) because it is designed to manage and segment network traffic efficiently within a local area network. VLANs allow for the logical separation of networks on the same physical switch, enabling a much more organized and secure networking environment. Each VLAN can be treated as its own isolated network, which enhances security and reduces broadcast traffic.

Switches utilize VLAN tagging protocols, such as IEEE 802.1Q, to differentiate between the various VLANs on the same physical network infrastructure. This allows devices to communicate as if they were on separate networks, despite sharing the same physical connection. It's this ability to control and segregate the network traffic at the data link layer (Layer 2) that makes switches the preferred device for VLAN implementation.

In contrast, routers operate at a higher layer (Layer 3) and are primarily used for routing between different networks rather than for segmenting traffic within the same network. Hubs are outdated devices that do not manage traffic efficiently as they broadcast all incoming packets to all ports, which is contrary to the VLAN concept. Bridges, although capable of filtering traffic, do not have the advanced features and flexibility that switches offer for VLAN management.