TCP/IP Management Programming Manual

Glossary
HP NonStop TCP/IP Management Programming Manual—529636-001
Glossary-15
return token
return token. In DSM programmatic interfaces, the token that indicates whether a
command was successful and, if not, why it failed. The token code for the return token
is ZSPI-TKN-RETCODE. Its value consists of a single integer field. Compare error
token.
RFC. See Request for Comments (RFC).
SAC. See ServerNet addressable controller (SAC).
SCF. See Subsystem Control Facility (SCF).
SCP. See Subsystem Control Point (SCP).
sensitive command. In DSM, a command that can be issued only by a restricted set of
Guardian users, such as the owner of a subsystem process. For Nonsotp data
communications subsystems, the sensitive commands are those that can change the
state or configuration of objects, start or stop tracing, or change the values of statistics
counters. Compare nonsensitive command.
ServerNet adapter. A customer-replaceable unit (CRU) that connects peripheral devices to
the rest of the system through a ServerNet bus interface (SBI). A ServerNet adapter is
similar in function to an I/O controller logic board (LB) and backplane interconnect card
(BIC) in NonStop K-series servers.
ServerNet addressable controller (SAC). A controller that is uniquely addressable within
one or more ServerNet address domains (SADs) through the node ID and address
fields in a request packet. A SAC typically is implemented on some portion of a
processor multifunction (PMF) customer-replaceable unit (CRU), an I/O multifunction
(IOMF) CRU, or a ServerNet adapter.
ServerNet LAN Systems Access (SLSA) subsystem. A subsystem of the NonStop
operating system. The SLSA subsystem enables the protocol I/O processes (IOPs)
and drivers to access the ServerNet adapters.
ServerNet wide area network (SWAN) concentrator. A Tandem data communications
peripheral that provides connectivity to a NonStop S-series server. The SWAN
concentrator supports both synchronous and asynchronous data over RS-232,
RS-449, X.21, and V.35 electrical and physical interfaces.
service. A set of primitives (operations) that a layer provides to the layer above it. The
service defines what operations the layer can perform on behalf of its users, but not
how these operations are implemented. A service relates to an interface between two
layers: the lower layer is the service provider, and the upper layer is the service user.
Compare protocol.
session. For a management application, the period during which an application can issue
commands to a subsystem.