Data Link Provider Interface (DLPI), Version 2
Copyright © 2000 The Open Group
DLPIData Link Provider Interface
DLSData Link Service
DLSAPData Link Service Access Point
DLSDUData Link Service Data Unit
ISOInternational Organization for Standardization
OSIOpen Systems Interconnection
PPAPhysical Point of Attachment
QOSQuality of Service
CalledThe DLS user in connection mode that processes requests for
connections from other DLS users.
CallingThe DLS user in connection mode that initiates the establishment of a
data link connection.
Communication endpointThe local communication channel between a DLS user and DLS provider.
Connection establishmentThe phase in connection mode that enables two DLS users to create a
data link connection between them.
Connectionless modeA 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 streamA 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 modeA circuit-oriented mode of transfer in which data is passed from one
user to another over an established connection in a sequenced manner.
Connection releaseThe phase in connection mode that terminates a previously established
data link connection.
Data link service data unitA grouping of DLS user data whose boundaries are preserved from one
end of a data link connection to the other.
Data transferThe phase in connection and connectionless modes that supports the
transfer of data between two DLS users.
DLSAPA point at which a DLS user attaches itself to a DLS provider, to access
data link services.
DLSAP addressAn identifier used to differentiate and locate specific DLS user
access points to a DLS provider.
DLS providerThe data link layer protocol that provides the services of the Data
Link Provider Interface.
DLS userThe user-level application or user-level or kernel-level protocol which
accesses the services of the data link layer.
Local managementThe 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.
PPAThe point at which a system attaches itself to a physical
PPA identifierAn identifier of a particular physical medium over which communication
Quality of serviceCharacteristics of transmission quality between two DLS users.