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Glossary
298 Web Tools Version 3.1.x/4.1.x User Guide
SFP
Small form factor pluggable. A transceiver used on 2 Gbps switches that replaces the GBIC. Refers
to the LC-form factor transceiver.
See also GBIC.
SID/DID
Source identifier/Destination identifier. S_ID is a 3-byte field in the frame header that is used to
indicate the address identifier of the N_Port from which the frame was sent.
Single Mode
The fiber optic cabling standard that, when used in conjunction with a 1300 nm laser light, can
transfer data up to 10 km between devices. When used in conjunction with a 1550 nm laser light,
single mode cabling can transfer data over 10 km.
See also multimode, LWL, ELWL, and XLWL.
SI
Sequence Initiative.
SNMP
Simple Network Management Protocol. An internet management protocol that uses either IP for
network-level functions and UDP for transport-level functions, or TCP/IP for both. Can be made
available over other protocols, such as UDP/IP, because it does not rely on the underlying
communication protocols.
See also Community (SNMP).
SNMPv1
The original SNMP, now labeled v1.
SNS
Simple Name Server. A switch service that stores names, addresses, and attributes for up to 15
minutes, and provides them as required to other devices in the fabric. SNS is defined by Fibre
Channel standards and exists at a well-known address. May also be referred to as directory service.
See also FS.
StorageWorks SAN switch
The brand name for the HP family of switches.
Switch Name
The arbitrary name assigned to a switch.
Switch Port
A port on a switch. Switch ports can be E_Ports, F_Ports, or FL_Ports.