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Glossary
trap host
Simple network management protocol (SNMP) management work-
station that is configured to receive traps.
trap recipient
In simple network management protocol (SNMP), a network man-
agement station that receives messages through SNMP for specific
events that occur on the arbitrated loop device.
trunk cable
Cable consisting of multiple fiber pairs that do not directly attach to
an active device. This cable usually exists between distribution panels
and can be located within, or external to, a building (D). Contrast with
jumper cable
. See also
optical cable
.
U
UDP
See
user datagram protocol
.
UL
See
Underwriters Laboratories
.
ULP
See
upper level protocol
.
unblocked connection
In a director or switch, the absence of the blocked attribute for a spe-
cific port. Contrast with
blocked connection
. See
connectivity attribute
.
See also
allowed connection
;
dynamic connection
;
dynamic connectiv-
ity
.
unblocked port
Devices communicating with an unblocked port can login to the
director or switch and communicate with devices attached to any
other unblocked port (assuming that this is supported by the current
zoning configuration).
Underwriters
Laboratories
UL. A laboratory organization accredited by the Occupational Safety
and Health Administration and authorized to certify products for use
in the home and workplace (D).
unicast
Communication between a single sender and a single receiver over a
network.
uninterruptable power
supply
UPS. A buffer between public utility power or another power source,
and a system that requires precise, uninterrupted power (D).
UNIX
A popular multi-user, multitasking operating system originally
designed to be a small, flexible system used exclusively by program-
Summary of Contents for SAN32M1
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