
UPnP
UPnP is an acronym for Universal Plug and Play. The goals of UPnP are to
allow devices to connect seamlessly and to simplify the implementation of
networks in the home (data sharing, communications, and entertainment) and in
corporate environments for simplified installation of computer components
User Priority
User Priority is a 3-bit field storing the priority level for the 802.1Q frame.
V
VLAN
Virtual LAN: 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.
W
WEP
WEP is an acronym for Wired Equivalent Privacy. WEP is a deprecated
algorithm to secure IEEE 802.11 wireless networks. Wireless networks
broadcast messages use radio, so are more susceptible to eavesdropping than
wired networks. When introduced in 1999, WEP was intended to provide
confidentiality comparable to that of a traditional wired network (Wikipedia).
WiFi
WiFi is an acronym for Wireless Fidelity. It is meant to be used generically when
referring of any type of 802.11 network, whether 802.11b, 802.11a, dual-band,
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