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them as required to other devices in the fabric. May also be
referred to as a directory service.
switch Hardware that routes frames according to FC protocol and is
controlled by software.
switch port A p ort on a switch. Switch ports can be E_Ports, F_Ports, or
FL_Ports.
SWL Short wavelength. A type of fiber optic cabling that is based
on 850 mm lasers and supports link speeds up to 2 Gb/s.
May also refer to the type of transceiver.
throughput The rate of data flow achieved within a cable, link, or system.
Usually measured in bits per second (b/s).
topology With respect to FC, the configuration of the FC network and
the resulting communication paths allowed. There are three
possible topologies:
• Point-to-point: A direct link between two c om munication
ports
• Switched fabric: M ultiple N_Ports linked to a switch by
F_Ports
• Arbitrated loop: Multiple NL_Ports connected in a loop
transmission word A group of transmission characters.
trap (SNM P) The message sent by an SN MP agent to inform the SNMP
management station of a critical error. See also SNMP.
U_Por t Universalport. AswitchportthatcanoperateasaG_Port,
E_Port, F_Port, or FL_Port. A port is defined as a U_Port when it
is not connected or has not yet assumed a specific function in
the fabric. See also E_port, F_port, G_Port.
well-known ad-
dress
With respect to F C, a logical address defined by the FC
standards as assigned to a specific function and stored on the
switch.
workstation A computer used to access and manage the fabric. May also
be called a management station or host.
WWN World wide name. An identifier that is unique worldw ide.
Each entity in a fabric has a distinct W WN.
zone A set of devices and hosts attached to the same fabric and
configured as being in the same zone. Devices and hosts
within the same zone have access permission to others in the
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Glossary