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LOSSARY
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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 802.1W An IEEE standard for the Rapid Spanning Tree Protocol (RSTP) which
reduces the convergence time for network topology changes to about 10%
of that required by the older IEEE 802.1D STP standard. (Now incorporated
in IEEE 802.1D-2004)
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.
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)
IGMP Internet Group Management Protocol. A protocol through which hosts can
register with their local router for multicast services. If there is more than
one multicast switch/router on a given subnetwork, one of the devices is
made the “querier” and assumes responsibility for keeping track of group
membership.
IGMP QUERY On each subnetwork, one IGMP-capable device will act as the querier —
that is, the device that asks all hosts to report on the IP multicast groups
they wish to join or to which they already belong. The elected querier will
be the device with the lowest IP address in the subnetwork.
IGMP SNOOPING Listening to IGMP Query and IGMP Report packets transferred between IP
Multicast Routers and IP Multicast host groups to identify IP Multicast
group members.
IN-BAND MANAGEMENT Management of the network from a station attached directly to the
network.
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