This video discusses the use of virtual LANs (VLANs) in networking. A virtual LAN is a concept used in networking to create separate, isolated networks. Devices that are connected to a virtual LAN can communicate with each other without interfering with devices that are connected to other virtual LANs. The default virtual LAN in most switches is known as the physical virtual LAN (PVID). This video demonstrates how to change the default virtual LAN on a switch.
This video explains how to use VLANs to improve network security. The presenter demonstrates how to connect a phone to a network and use it as an iperf server, as well as how to print objects using a 3D printer.