Alcatel 5620 Troubleshooting Manual page 188

Glossary
network topology
networkstation
NPDU
O
OSS
P
PC
PDU
Q
QoS
R
router
routing instance
routing protocol
GL-4
A physical device in the network, such as a 7750 SR router, or a switch, such
as the 7670 RSP.
A network topology is the layout of a network, which can include the way in
which elements in a network, such as nodes, are connected and how they
communicate.
A UNIX platform where the 5620 SAM software runs.
network protocol data unit
operational support system
A network management system supporting a specific management function,
such as alarm surveillance and provisioning, in a service provider network.
personal computer
protocol data unit
A PDU is a message of a given protocol comprising payload and
protocol-specific control information, typically contained in a header. PDUs
pass over the protocol interfaces which exist between the layers of protocols,
as indicated in the OSI model.
Quality of Service
QoS is a term for the set of parameters and their values that determine the
performance of a virtual circuit. This service level is usually described in a
network by delay, bandwidth, and jitter.
A router is an interface device between two networks, connecting LANs to
LANs or LANs to WANs. It selects the most cost-effective route for moving
data between multiprotocol LANs, making sure that only one route exists
between source and destination devices. Routers make forwarding decisions
based on network layer addresses.
A routing instance is the configuration of a router, including information
such as protocols, interfaces, routing, and policies.
A routing protocol is used to determine the correct route for packets within
IP and IP/MPLS networks.
Alcatel 5620 Service Aware Manager, Release 2.1 R2
May 2005 95-5887-01-00-B