VLANs allow devices to communicate with each other across different physical networks.
In Packet Tracer, VLANs (Virtual Local Area Networks) are used to logically segment a network into different broadcast domains based on their functional or departmental requirements. VLANs allow devices within the same VLAN to communicate with each other as if they were on the same physical network, even if they are connected to different physical switches. This helps in increasing network security, efficiency, and flexibility.