IEEE 802.1Q VLAN
A VLAN is a group of ports that can be anywhere in the network, but
communicate as though they were in the same area.
VLANs can be easily organized to reflect department groups (such as
R&D, Marketing), usage groups (such as e-mail), or multicast groups
(multimedia applications such as video conferencing), and therefore
help to simplify network management by allowing users to move
devices to a new VLAN without having to change any physical
connections.
IEEE802.1Q VLAN function base on VID and PVID to distributes
different VLAN groups. But IEEE802.1Q VLAN doesn't support
multi-need server application via Untag port (Untag Port cannot
overlap in different VLAN groups). For multi-need server application
via Untag Port that the device support IEEE802.1Q Asymmetric
VLAN function can be covered it.
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