What is a VLAN

A VLAN is a form of network segmentation that creates separate virtual networks for network devices to be placed on. VLANs are highly useful for applications such as network security.

A VLAN allows for users to be kept separate on the network, this way Junior from sales cannot access CEO Bill's internet traffic.

Native / Untagged VLAN

The native or Untagged VLAN is a method of tagging a port where the client device is unaware it is on a VLAN and requires no pre-configuration.

Over the native VLAN, no VLAN tags are transferred, thus the connection behaves as if it is connected on the primary network.

Tagged VLAN

A Tagged VLAN is a separate network from the native VLAN, if a device wishes to connect on this VLAN, the port it is connected on will need to be set as a tagged VLAN, and the VLAN will also need to be configured from the device side.

Trunk Port

The trunk port is used to transfer all Native and Tagged VLAN data over a set port.
This is commonly used on uplink ports as this will ensure all data can be sent to the upstream network and no users will be stuck with no internet connection.