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Coaxial Cable.
Data transmission medium with a single-wire
conductor insulated from electro-magnetic and radio frequency
interference.
Concentrator.
See hub.
CSMA/CD
. Carrier Sense Multiple Access with Collision Detection.
CSMA/CD is the access method used in Ethernet where nodes
contend for the right to send data.
DMA.
Direct Memory Access. DACK stands for Dma ACKnowledge
and DRQ for Dma ReQuest. DMA provides direct access to system
memory without adding to CPU overhead. The DACK and DRQ
channels govern that communication.
Ethernet.
A 10 megabits-per-second baseband, CSMA/CD network
originally designed by the Xerox Corporation.
File Server
. A device on a LAN that provides mass storage of files. A
file server can be dedicated (only performs network management
functions) or non-dedicated (where user applications can co-exist
while the network is available.
Hub
. A concentrator or repeater in a star topology at which node
connections meet.
Jabber.
This occurs when there are excessively long data packets
being transmitted from the node (i.e., workstation, server). At that
point, the hub, or concentrator, partitions (isolates) the node from the
network until the condition is corrected.
LED.
Light-emitting diode.
Network topology.
The arrangement of nodes usually forming a star,
ring, tree, or bus pattern.
Node.
Any device including servers and workstations connected to a
network; also the point where devices are connected.
