HP A4500A HP DLPI Programmer's Guide - Page 221
Glossary, Data link service data - server
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Glossary APA The Auto Port Aggregation (APA) product offered by HP allows grouping of networking links to form a single high bandwidth, highly available and scalable networking link, called an aggregate interface. HP APA also allows formation of a failover group of networking links connected across switches for an highly available link configuration on the server. The APA PPA values are in the range 900 - 949. Callee The DLS user in connection mode that processes requests for connections from other DLS users. Caller 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 connections 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 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 mode that supports the transfer of data between two DLS users. DLSAP A point at which a DLS user attached 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 that accessess the services of the data link layer. Local management The phase in connection and connectionless modes in which a DLS user initiates 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. Glossary 221