3Com 3C10402B, Administrator'S Manual

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562 G
LOSSARY
R
reconfiguration The process of physically altering the location or functionality of network
or system elements. Automatic configuration describes the way
sophisticated networks can readjust themselves in the event of a link or
device failing, enabling the network to continue operation.
redundancy In data transmission, this refers to characters and bits that can be
removed from a transmission without affecting the message. In data
processing and data communications, it means providing backup for
components so that if one of them fails, the system continues to run
without interruption.
REN Ringer Equivalency Number. A number that indicates how much power is
required by a telephone to make it ring. When connecting telephones to
a telephone line, the sum of the RENs of the telephones must be less than
the rated REN capacity of the telephone line.
repeater A device that extends the maximum length of cable that can be used in a
single network.
RMON Remote Monitoring. A facet of SNMP-based network management, the
RMON MIB (Management Information Base) defines the standard
network monitoring functions for communication between SNMP-based
management consoles and remote monitors. A typical MIB captures
information about a device, but RMON captures information about traffic
between devices.
RJ-11 A four-wire modular connector used by the telephone system.
RJ-45 An eight-wire modular connector used by telephone systems. The
eight-pin modular connectors used for 10BASE-T
UTP cable resemble
RJ-45 connectors, but they have substantially different electrical
properties.
router A network device that links LANs together locally or remotely as part of a
WAN. A network built using routers is often termed an internetwork.
routing The process of delivering a packet across one or more networks via the
most appropriate path.
SA System Appearance