Avaya P550R User Manual page 162

Segment
Segmentation and
Reassembly (SAR)
Sublayer
Segmentation and
Reassembly
Protocol Data Unit
(SAR-PDU)
Shortest Path First
Algorithm (SPF)
Signaling
Signaling ATM
Adaptation Layer
(SAAL)
Simple Network
Management
Protocol (SNMP)
SNMP Community
String
SNMPv2
Subnet
Subnet Mask
Subnetwork
G-10
Avaya P550R/P580/P880/P882 Multiservice Switch ATM Uplink Module User Guide, Version 2.0
An Ethernet connection with one or more endstations attached to it,
or an ATM link to an endstation operating as an ATM Forum LAN
Emulation client. A segment is specified by its device's IP host name
and port number.
Converts PDUs into appropriate lengths and formats them to fit the
payload of an ATM cell. At the destination endstation, SAR extracts
the payloads from the cells and converts them back into PDUs,
which can be used by applications higher up the protocol stack.
Information that has passed through SAR and been loaded into ATM
cells, ready to be forwarded to the TC sublayer of the ATM physical
layer for actual transmission.
A routing algorithm used to determine the shortest or lowest cost
path between two endpoints in a network.
The standard process used to establish ATM point-to-point,
point-to-multipoint, and multipoint-to-multipoint connections.
Resides between the ATM layer and the Q.2931 function. The SAAL
provides reliable transport of Q.2931 messages between Q.2931
entities (ATM switch and host, for example) over the ATM layer.
SAAL contains two sublayers: common part and service-specific
part.
An application protocol between an SNMP management application
and an SNMP agent; it is based on the IP protocol.
A password that is included with each packet sent by an SNMP
management station to an SNMP agent. The community string
controls both the visibility and changeability of various portions of
an SNMP agent's MIB.
The IETF's latest version of the Simple Network Management
Protocol (SNMP) which adds new features including acknowledge
traps and secure sets.
A logical subdivision within the IP internetwork architecture.
A 32-bit quantity indicating which of the least significant bits in an
IP address is to be used to identify the host ID portion of the address.
A logical subdivision of a network protocol's internetwork
architecture, such as an IP subnet, IPX network, or DECnet area.