G
LOSSARY
Glossary-3
IEEE 802.1D
Specifies a general method for the operation of MAC bridges, including
the Spanning Tree Protocol.
IEEE 802.1Q
VLAN Tagging—Defines Ethernet frame tags which carry VLAN
information. It allows switches to assign endstations to different virtual
LANs, and defines a standard way for VLANs to communicate across
switched networks.
IEEE 802.1p
An IEEE standard for providing quality of service (QoS) in Ethernet
networks. The standard uses packet tags that define up to eight traffic
classes and allows switches to transmit packets based on the tagged priority
value.
IEEE 802.1X
Port Authentication controls access to the switch ports by requiring users
to first enter a user ID and password for authentication.
IEEE 802.3ac
Defines frame extensions for VLAN tagging.
IEE 802.3af (PoE)
An IEEE standard for providing Power over Ethernet (PoE) capabilities. When
Ethernet is passed over copper cable, two twisted pairs are used for data transfer,
and two twisted pairs are unused. With PoE, power can either be passed over the
two data pairs or over the two spare pairs.
IEEE 802.3x
Defines Ethernet frame start/stop requests and timers used for flow
control on full-duplex links. (Now incorporated in IEEE 802.3-2002)
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