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g–22
SAN Director 64 Installation Guide
trunk cable
Cable consisting of multiple fiber pairs that do not directly attach to an active device. This
cable usually exists between distribution panels. 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 assuming that this is supported by the current
zoning configuration.
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).
vital product data
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
Indication that a possible error has been detected. See also error message and information
message.
wrap plug
See loopback plug.
world wide name
Eight byte address that uniquely identifies a switch, or a node (end device), even on global
networks.
WWN
See world wide name.
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