Cambridge SoundWorks P460 manual Nsap, Oid, Osi, Ospf, Ping

Glossary

that defines the interface between two ATM switches that are both located in a private network (P-NNI) or that are both located in a public network (public NNI).

Node

A point of interconnection to a network or a junction of two or more lines in a network. A node can be a computer or some other device, such as a printer. Every node has a unique network address.

NSAP

Network Service Access Point. An ISO-specified network address.

OID

Object Identifier. Used in SNMP to identify managed objects. In the SNMP Manager/Agent Network Management Paradigm, each managed object must be identified by a unique OID.

OSI

Open Systems Interconnection reference model. A model for network communications consisting of seven layers that describe what happens when computers communicate with one another.

OSPF

Open Shortest Path First. A routing protocol featuring least-cost routing, multipath routing, and load balancing.

Out-of-Band

Transmission of auxiliary information, such as management messages, using frequencies or channels outside the frequencies or channels normally used for information transfer. Out-of-band signaling is often used for error reporting in situations in which in-band signaling can be affected by whatever problems the network might be experiencing.

Packet

Logical grouping of information that includes a header containing control information and usually user data. Packets are most often used to refer to application layer data units.

PING

Packet Internet Groper. Determines whether a specific IP address is accessible by sending a packet to the specified address and waiting for a reply.

Plus Tagging

A proprietary Avaya tagging mechanism that enables extended VLAN capabilities.

206 Avaya P460 Reference Guide