Interlogix NS4702-24P-4S-4X User Manual page 426

QL In SyncE this is the Quality Level of a given clock source. This is received on a port in a SSM indicating the quality of
the clock received in the port.
QoS
QoS is an acronym for Quality of Service. It is a method to guarantee a bandwidth relationship between individual
applications or protocols.
A communications network transports a multitude of applications and data, including high-quality video and delay-sensitive
data such as real-time voice. Networks must provide secure, predictable, measurable, and sometimes guaranteed
services.
Achieving the required QoS becomes the secret to a successful end-to-end business solution. Therefore, QoS is the set of
techniques to manage network resources.
QoS class
Every incoming frame is classified to a QoS class, which is used throughout the device for providing queuing, scheduling
and congestion control guarantees to the frame according to what was configured for that specific QoS class. There is a
one to one mapping between QoS class, queue and priority. A QoS class of 0 (zero) has the lowest priority.
R
RARP
RARP is an acronym for Reverse Address Resolution Protocol. It is a protocol that is used to obtain an IP address for a
given hardware address, such as an Ethernet address. RARP is the complement of ARP.
RADIUS
RADIUS is an acronym for Remote Authentication Dial In User Service. It is a networking protocol that provides centralized
access, authorization and accounting management for people or computers to connect and use a network service.
RDI
RDI is an acronym for Remote Defect Indication. It is a OAM functionallity that is used by a MEP to indicate defect detected
to the remote peer MEP
Router Port
A router port is a port on the Ethernet switch that leads switch towards the Layer 3 multicast device.
RSTP
In 1998, the IEEE with document 802.1w introduced an evolution of STP: the Rapid Spanning Tree Protocol, which
provides for faster spanning tree convergence after a topology change. Standard IEEE 802.1D-2004 now incorporates
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