Introduction to Networking for NonStop S-Series Servers

Glossary
Introduction to Networking for HP NonStop S-Series Servers—520670-005
Glossary-10
heterogeneous
heterogeneous. Consisting of components following different protocols and often
manufactured by different vendors.
High-Level Data Link Control (HDLC) Extended Mode protocol. The protocol used by
the satellite-connect line-handler process. Unlike the HDLC Normal protocol
implemented by direct-connect Expand line-handler processes, the HDLC Extended
Mode protocol uses the maximum window size of 61 frames (the maximum number of
outstanding frames before an acknowledgment is required) and implements the
selective reject feature. Selective reject causes only frames that arrive in error to be
retransmitted. See also High-Level Data Link Control (HDLC) Normal protocol.
High-Level Data Link Control (HDLC) Normal protocol. The protocol used by the direct-
connect line-handler process. The direct-connect line-handler process is provided for
use with conventional voice-grade leased-line and switched-line facilities, private
facilities, and fractional Transmission Group 1 (T1) facilities. See also High-Level Data
Link Control (HDLC) Extended Mode protocol.
host system. A computer system that supports very large databases and that does batch
processing, usually for an entire network of smaller systems.
HP NonStop Kernel. The operating system for HP NonStop servers.
HP NonStop ServerNet Cluster. The product name for the collection of hardware and
software components that constitute a ServerNet cluster.
HP NonStop Open System Management (OSM) Interface. See OSM.
IEEE. An acronym for Institute of Electrical and Electronics Engineers.
IEEE 802.3 protocol. Institute of Electrical and Electronics Engineers (IEEE) standard
defining the hardware layer and transport layer of (a variant of) Ethernet. The
maximum segment length is 500 meters and the maximum total length is 2.5
kilometers. The maximum number of hosts is 1024. The maximum packet size is 1518
bytes.
initiator. The File Transfer, Access, and Management (FTAM) process responsible for
establishing an association and initiating activities over the association. The initiator
accepts requests for operations on remote files. See also responder.
input/output (I/O). (1) Data entered into a computer or transmitted out of a computer.
(2) The process of entering data into or transmitting data out of a computer.
input/output process (IOP). A running program (part of the operating system) that
manages the input/output (I/O) functions for one or more ServerNet addressable
controllers (SACs) of the same type. See also file system.
interactive interface. The means by which an operator gains access to a set of computing
services.