Planet GS-5220 Series, User Manual, Page: 566 / 568

User’s Manual of GS-5220 LCD Series
566
VLAN
A method to restrict communication between switch ports. VLANs can be used for the following
applications:
VLAN unaware switching: This is the default configuration. All ports are VLAN unaware with
Port VLAN ID 1 and members of VLAN 1. This means that MAC addresses are learned in VLAN
1, and the switch does not remove or insert VLAN tags.
VLAN aware switching: This is based on the IEEE 802.1Q standard. All ports are VLAN aware.
Ports connected to VLAN aware switches are members of multiple VLANs and transmit tagged
frames. Other ports are members of one VLAN, set up with this Port VLAN ID, and transmit
untagged frames.
Provider switching: This is also known as Q-in-Q switching. Ports connected to subscribers are
VLAN unaware, members of one VLAN, and set up with this unique Port VLAN ID. Ports
connected to the service provider are VLAN aware, members of multiple VLANs, and set up to
tag all frames. Untagged frames received on a subscriber port are forwarded to the provider port
with a single VLAN tag. Tagged frames received on a subscriber port are forwarded to the
provider port with a double VLAN tag.
VLAN ID
VLAN ID is a 12-bit field specifying the VLAN to which the frame belongs.
Voice VLAN
Voice VLAN is VLAN configured specially for voice traffic. By adding the ports with voice devices attached
to voice VLAN, we can perform QoS-related configuration for voice data, ensuring the transmission
priority of voice traffic and voice quality.
W
WEP
WEP is an acronym for W ired E quivalent P rivacy. WEP is a deprecated algorithm to secure IEEE 802.11
wireless networks. Wireless networks broadcast messages using radio, so are more susceptible to
eavesdropping than wired networks. When introduced in 1999, WEP was intended to provide