Glossary - 16
FORE Systems ES-2810 Ethernet Switch User's Manual
Glossary
High Performance Parallel Interface (HIPPI) - ANSI standard that extends the computer bus
over fairly short distances at speeds of 800 and 1600 Mbps.
High-Speed Serial Interface (HSSI) - a serial communications connection that operates at speeds
of up to 1.544 Mbps.
Host - In a network, the primary or controlling computer in a multiple computer installation.
HPUX - the Hewlett-Packard version of UNIX.
Hub - a device that connects several other devices, usually in a star topology.
I/O Module - FORE's interface cards for the LAX-20 LAN Access Switch, designed to connect
Ethernet, Token Ring, and FDDI LANs to ForeRunner ATM networks.
Institute of Electrical and Electronics Engineers (IEEE) - the world's largest technical profes-
sional society. Based in the U.S., the IEEE sponsors technical conferences, symposia & local
meetings worldwide, publishes nearly 25% of the world's technical papers in electrical, elec-
tronics & computer engineering, provides educational programs for members, and promotes
standardization.
IEEE 802 - Standards for the interconnection of LAN computer equipment. Deals with the
Data Link Layers of the ISO Reference Model for OSI.
IEEE 802.1 - Defines the high-level network interfaces such as architecture, internetworking
and network management.
IEEE 802.2 - Defines the Logical Link Control interface between the Data Link and Network
Layers.
IEEE 802.3 - Defines CSMA/CD (Ethernet).
IEEE 802.4 - Defines the token-passing bus.
IEEE 802.5 - Defines the Token Ring access methodology. This standard incorporates IBM's
Token Ring specifications.
IEEE 802.6 - Defines Metropolitan Area Networks.
IEEE 802.7 - The broadband technical advisory group.
IEEE 802.8 - The fiber optics technical advisory group.
IEEE 802.9 - Defines integrated data and voice networks.
Integrated Services Digital Network (ISDN) - an emerging technology that is beginning to be
offered by the telephone carriers of the world. ISDN combines voice and digital network ser-
vices into a single medium or wire.
Interexchange Carriers (IXC) - Long-distance communications companies that provide service
between Local Access Transport Areas (LATAs).
Interface Data - the unit of information transferred to/from the upper layer in a single interac-
tion across a SAP. Each Interface Data Unit (IDU) controls interface information and may also
contain the whole or part of the SDU.
Interface Data Unit (IDU) - The unit of information transferred to/from the upper layer in a sin-
gle interaction across the SAP. Each IDU contains interface control information and may also
contain the whole or part of the SDU.
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