Cabletron Systems 100BASE-FX, Cabling Manual

Page: 180 / 192

CSMA/CD to Dual Attached
Glossary-4
CSMA/CD
Carrier Sense Multiple Access with Collision Detection. CSMA/CD is the
basis for the operation of Ethernet networks. CSMA/CD is the method
by which stations monitor the network, determine when to transmit data,
and what to do if they sense a collision or other error during that
transmission.
Data
Information, typically in the form of a series of bits, which is intended to
be stored, altered, displayed, transmitted, or processed.
Data Loop
A condition caused by the creation of duplicate paths which network
transmissions could follow. Data loops are created by the use of
redundant connections between network segments or devices. Ethernet
networks cannot effectively function with data loops present. To allow
the creation of fault-tolerant networks, data loops are automatically
detected and eliminated by the Spanning Tree algorithm.
DB15
A 15-pin connector used to terminate transceiver cables in accordance
with the AUI specification.
DB9
A 9-pin connector, typically used in Token Ring networks and for serial
communications between computers.
Decryption
The translation of data from an encrypted (see encryption) form into a
form both recognizable and utilizable by a workstation, node, or network
device
.
Dedicated
Assigned to one purpose or function.
Default Gateway
The IP address of the network or host to which all packets addressed to
unknown network or host are sent.
Device (network)
Any discrete electronic item connected to a network which either
transmits and receives information through it, facilitates that
transmission and reception, or monitors the operation of the network
directly.
DLM
Distributed LAN Monitor. DLM is a feature of some SNMP management
devices which allows that device to locally monitor other devices under
its control and report to a central network management station any noted
errors. This frees the network management station from directly
monitoring every SNMP device.
DNI
Desktop Network Interface. DNI cards are devices which are added to
workstations to provide them with a connection to a network (NIC).
Dual Attached
Connected to an FDDI dual counter-rotating ring through the use of A/B
ports
.