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Glossary 33
Glossary
Numbers
100VG-AnyLAN Refers to the
100Mbit/s network technology over
voice grade cable that is
compatible with the IEEE 802.12
standard. This technology
guarantees access to any end node
that request to transmit, which
ensuring priority access to end
nodes that require consistent,
continuous access for application
such as full-motion video or video
conferencing. See also: Demand
Priority Protocol.
A
adapter An add-on computer
interface card and circuitry that
provides the physical connection
and data translation between the
host computers’s I/O bus and
external devices or networks.
adapter slot The location where
adapters attach to the backplane.
B
backplane For an I/O bus. The
computer’s circuitry and
connectors to which adapter cards
connect.
C
CAT Category A cable quality
rating. 100VG-AnyLAN supports
CAT-3 or 5 UTP cable. See LAN
cable.
collision The result of two or
more nodes on an 802.3 network
transmitting at the same time,
producing a garbled transmission.
D
Demand Priority Protocol A
request-based protocol that is
deterministic—a network end node
connected to a 100VG hub makes a
request (or “demand”) to transmit,
and then can transmit only when
authorized by the hub. Under hub
control, the Demand Priority
Protocol guarantees network
access for any end node that
requests to transmit data.
driver A portion of system code
that allows communication
between the operating system and
the network card.
E
Ethernet A LAN that uses the
CSMA/CD method of access and
transmits at 10Mbit/s on a bus or