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GLOSSARY 3
Hub A device used to provide connectivity between network devices. Hubs
perform the basic repeater functions of restorating signal amplitude and
timing, detecting collisions, and broadcasting signals to lower-level hubs
and network devices.
MAC Media Access Control. The data link sublayer that is responsible for transferring
data to and from the physical layer.
MIB Management Information Base. A logical naming of all information
resources residing in a network and pertinent to the network’s
management. Simple Network Management Protocol (SNMP) management
uses a set of standard MIBs known as MIB II and other standard MIBs for
FDDI, Ethernet, etc. In addition, vendors write proprietary MIB extensions for
SNMP management of particular devices.
Partition A repeater function that isolates a particular port from the network because
of an excessive number of collisions. Once the problem causing the
collisions is corrected, the port is reactivated.
Repeater A device that extends the length, topology, or interconnectivity of the
physical medium beyond that imposed by a single segment, up to the
maximum allowable end-to-end trunk transmission line length. Repeaters
perform the basic actions of restoring signal amplitude, waveform, and
timing applied to normal data and collision signals. See also Hub.
SNMP Simple Network Management Protocol. A network monitoring protocol for
TCP/IP-based networks. It is a simple request/response protocol used to
communicate management information between the network management
station and the agent residing in network elements. The protocol does not
define the objects that can be managed. (The MIB defines manageable
objects.) SNMP can be used with any network management variable that can
be inspected and altered.
Standard Ethernet
cable
A 0.4-inch diameter cable comprised of two foil shields and two braids over
copper wire. It requires an external transceiver cable or N-series to BNC series
adapter. It is also called thick Ethernet cable. See also thin Ethernet cable.
STP Shielded twisted-pair. Shielded four-conductor electrical cable that offers
high-speed transmission for long distances.