director product manager user guide
Glossary–21
Glossary
trap host
SNMP management workstation that is configured to receive traps.
trunk cable
Cable consisting of multiple fiber pairs that do not directly attach to an active device. This
cable usually exists between distribution panels. See also optical cable, contrast with jumper
cable.
unblocked port
Devices attached to an unblocked port can login to the director and communicate with devices
attached to any other unblocked port.
unicast
Communication between a single sender and a single receiver over a network. Compare to
multicast and anycast (communication between any sender and the nearest of a group of
receivers).
universal port module card
Each fiber port module card provides four Fibre Channel connections through duplex small
form factor pluggable (SFP) fiber-optic transceivers. 1 or 2 gigabits per second enabled.
UPM card
See universal port module card
vital product data (VPD)
System-level data stored by the backplane in the electrically erasable programmable read-only
memory. This data includes serial numbers and identifies the manufacturer.
VPD
See vital product data.
warning message
Software message that indicates a possible error was detected. See also error message and
information message.
world wide name (WWN)
Eight-byte address that uniquely identifies a switch, or a node (end device) on global
networks.
WWN
See world wide name.
