Final answer:
A virtual LAN (VLAN) is a concept in computer networking that involves dividing a physical network into multiple logical networks. It improves network performance, security, and management by isolating traffic and controlling access between devices.
Step-by-step explanation:
A virtual LAN (VLAN) is a concept in computer networking that involves dividing a physical network into multiple logical networks. It allows devices to be grouped together based on factors such as department, location, or function, even if they are physically connected to different switches or routers. VLANs help improve network performance, security, and management by isolating traffic and controlling access between devices.
For example, in a school, you could have different VLANs for students, teachers, and administrators, each with its own set of network resources and permissions. This way, student devices cannot access sensitive information intended only for teachers or administrators.
A VLAN is an example of physical network segmentation. It is not related to wireless network technology, satellite communication, or fiber optic transmission.