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Data Link Provider Interface (DLPI), Version 2
Copyright © 2000 The Open Group
Glossary
DLPI
Data Link Provider Interface
DLS
Data Link Service
DLSAP
Data Link Service Access Point
DLSDU
Data Link Service Data Unit
ISO
International Organization for Standardization
OSI
Open Systems Interconnection
PPA
Physical Point of Attachment
QOS
Quality of Service
Called
The DLS user in connection mode that processes requests for
connections from other DLS users.
Calling
The DLS user in connection mode that initiates the establishment of a
data link connection.
Communication endpoint
The local communication channel between a DLS user and DLS provider.
Connection establishment
The phase in connection mode that enables two DLS users to create a
data link connection between them.
Connectionless mode
A mode of transfer in which data is passed from one user to another in
self-contained units with no logical relationship required among the units.
Connection management stream
A special stream that will receive all incoming connect indications
destined for DLSAP addresses that are not bound to
any other streams associated with a particular PPA.
Connection mode
A circuit-oriented mode of transfer in which data is passed from one
user to another over an established connection in a sequenced manner.
Connection release
The phase in connection mode that terminates a previously established
data link connection.
Data link service data unit
A grouping of DLS user data whose boundaries are preserved from one
end of a data link connection to the other.
Data transfer
The phase in connection and connectionless modes that supports the
transfer of data between two DLS users.
DLSAP
A point at which a DLS user attaches itself to a DLS provider, to access
data link services.
DLSAP address
An identifier used to differentiate and locate specific DLS user
access points to a DLS provider.
DLS provider
The data link layer protocol that provides the services of the Data
Link Provider Interface.
DLS user
The user-level application or user-level or kernel-level protocol which
accesses the services of the data link layer.
Local management
The phase in connection and connectionless modes in which a DLS user
initializes a stream and binds a DLSAP to the stream. Primitives in this phase
generate local operations only.
PPA
The point at which a system attaches itself to a physical
communications medium.
PPA identifier
An identifier of a particular physical medium over which communication
transpires.
Quality of service
Characteristics of transmission quality between two DLS users.