NBT Manual

Glossary
NBT Manual—424773-001
Glossary-17
ServerNet adapter
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 Himalaya 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 Compaq NonStop
Kernel 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 Compaq data communications
peripheral that provides connectivity to a Himalaya 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.
Simple Mail Transfer Protocol (SMTP). The Internet standard protocol for transferring
electronic mail messages from one machine to another. SMTP specifies how two mail
systems interact, and specifies the format of control messages the two mail systems
exchange to transfer mail.
simple token. In DSM programmatic interfaces, a token consisting of a token code and a
value that is either a single elementary field, such as an integer or a character string, or a
fixed (nonextensible) structure. Compare extensible structured token.
SLSA Subsystem. See ServerNet wide area network (SWAN) concentrator
on page -17
SMTP. See Simple Mail Transfer Protocol (SMTP)
.
SNAP. See Subnetwork Access Protocol (SNAP)
.
SPI. See Subsystem Programmatic Interface (SPI)
.
SPI buffer. The buffer that contains an SPI message. See also SPI message
.