A Virtual Local Area Network (VLAN) is a logical grouping of devices in the same broadcast domain that are segmented in a computer network. Coursera's VLAN catalogue equips you with the knowledge to design, manage and troubleshoot these virtual networks. You'll learn the benefits of VLANs such as increased performance, improved network security and ease of administration. You'll also understand how to configure VLANs on switches, the concept of VLAN Trunk Protocol (VTP), Inter-VLAN routing, and the role of VLANs in network architecture. This skill is valuable for network engineers, IT professionals, and anyone involved in the design and management of organizational networks.