EMC DS-8B manual

		Glossary
	Q
QuickLoopTM	Can indicate either the DS-16B and DS-8B product that allows private
	devices within loops to communicate over the fabric with other
	devices, or the set of actual devices or looplets connected in a loop by
	the QuickLoop technology. All devices in a QuickLoop share a single
	AL PA space and behave as if they are in one loop.
	R
R_A_TOV	Resource Allocation Time-out Value. Maximum time a frame can be
	delayed in the fabric and still be delivered. See also E_D_TOV.
RAID	Redundant Array of Independent Disks. Collection of disk drives that
	appear as a single volume to the server, and are fault-tolerant through
	mirroring or parity checking. See also JBOD.
Route	As applies to fabric, a communication path between two switches.
	Routing is the assignment of Class 2 or 3 frames to the most
	appropriate switch ports for the intended destinations. See also FSPF.
RSCN	Registered State Change Notification. Switch function that sends
	notification of fabric changes from the switch to specified nodes.
	S
SAN	Storage Area Network. Network of systems and storage devices that
	usually communicate using fibre channel protocols. See also Fabric.
Sequence	A fibre channel structure containing one or more frames transmitted
	in a unidirectional manner between N_Ports. See also Exchange,
	Frame.
Single mode	Fibre-optic cabling standard that provides for distances of up to 10
	kilometers between devices.
SNMP	Simple Network Management Protocol. Internet management
	protocol that does not rely on underlying communication protocols
	and can therefore be made available over other protocols, such as
	UDP/IP. Uses IP for network layer functions and UPD for transport
	layer function, or TCP/IP for both. See also Community (SNMP).
SNS	Simple Name Server. See Name server.

Departmental Switch Models DS-16B and DS-8B Web Tools User Guide

g-11