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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 802.1S An IEEE standard for the Multiple Spanning Tree Protocol (MSTP)
which provides independent spanning trees for VLAN groups.
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 PROXY Proxies multicast group membership information onto the upstream
interface based on IGMP messages monitored on downstream
interfaces, and forwards multicast traffic based on that information.
There is no need for multicast routing protocols in an simple tree that
uses IGMP Proxy.
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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