TCP/IP Configuration and Management Manual

Glossary
TCP/IP Configuration and Management Manual—427132-004
Glossary-17
summary state
summary state. In DSM interfaces to data communications subsystems, one of the
generally defined possible conditions of an object, with respect to the management of
that object. A summary state differs from a state in two ways. First, a summary state
pertains to the management of an object, whereas a state may convey other kinds of
information about the object. Second, summary states are defined the same way for all
data communications subsystems a NonStop system, whereas the set of possible
states differs from subsystem to subsystem. The management programming interfaces
to data communications subsystems refer to summary states rather than to states.
Examples of summary states are STARTED, STOPPED, SUSPENDED, and
ABORTING.
SWAN concentrator. See ServerNet wide area network (SWAN) concentrator.
symbolic name. In DSM programmatic interfaces, a name used in programs to refer to
commonly used values, token codes, token maps, extensible structures, and other
related variables for use in management programs.
TCP (Transmission Control Protocol). The Internet standard transport-level protocol that
provides the reliable, full-duplex stream service on which many application protocols
depend. TCP allows a process on one machine to send a stream of data to a process
on another. It is connection-oriented, in the sense that before transmitting data
participants must establish a connection. Software implementing TCP usually resides
on the operating system and uses the IP protocol to transmit information across the
Internet. It is possible to terminate (shut down) one direction of flow across a TCP
connection, leaving a one-way (simplex) connection. The Internet protocol suite is
often referred to as TCP/IP because TCP is one of the two most fundamental
protocols.
TELNET. The Internet standard protocol for remote terminal connection service. TELNET
allows a user at one site to interact with remote timesharing systems at another site
just as if the user's terminal is connected directly to the remote machine. That is, the
user invokes a TELNET application program that connects to a remote machine,
prompts for a login id and password, then passes keystrokes from the user's terminal
to the remote machine and displays output from the remote machine on the user's
terminal.
TFTP. See Trivial File Transfer Protocol (TFTP).
token. In DSM use, a distinguishable unit in a SPI message. Programs place tokens in an
SPI buffer using the SSPUT or SSINIT procedures and retrieve them from the buffer
with the SSGET procedure. A token has two parts: an identifying code, or token code,
and a token value. In command and response messages, a token normally represents
a parameter to a command, an item of information in a response, or control information
for the subsystem. In event messages, a token normally represents an item of
information about an event or about the event message itself. See also header token
.