Enterasys Networks Fast Network 10 - Manual (Page 121)

Appendix B: Glossary
Fast Network 10 User Guide Page B-3
concentrator
A device that provides attachment points for stations that are not
connected to the FN10. The concentrator is connected directly to the
network; the stations connect to the concentrator.
congestion
A condition where a portion of the network is overloaded with more data
than can be transmitted in the desired time period.
CSMA/CD (carrier-sense multiple access with collision detection)
A channel access (contention) method that requires each station to wait
for an idle channel before transmitting. In addition, stations are able to
detect overlapping transmissions (collisions) and retransmit in the event
of a data collision.
data link layer
Layer 2 in the OSI model. Defines frame construction, addressing, error
detection, and other services to higher layers.
datagram
Abbreviated and connectionless single-packet message sent from one
station to another.
data rate (or speed)
The maximum number of bits of information that can be transmitted per
second.
destination address filtering
A process that discards (filters) traffic based on MAC destination
addresses.
downstream
Refers to the relative position of a station in a network to another station
in the same network. A station is downstream from another station if it
receives data after the other station receives data.
dynamic address
An address “learned” by the FN10, as opposed to addresses that are
manually entered into the Bridge Address Table. The FN10 “learns”
addresses by reading them from the data packets it processes.