Asynchronous Terminals and Printer Processes Configuration and Management Manual

Glossary
Asynchronous Terminals and Printer Processes Configuration and Management Manual—424280-003
Glossary-11
ServerNet adapter
requester. Servers are designed to receive request messages from clients or
requesters; perform the desired operations, such as database inquiries or updates,
security verifications, numerical calculations, or data routing to other computer
systems; and return reply messages to the clients or requesters. A server process is a
running instance of a server program.
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 address. A virtual memory address that, when translated to a physical address,
indicates where the memory access needed by a ServerNet transaction begins. In
some cases, the translation can point to some entity other than memory, such as a
register. The ServerNet address is included in all ServerNet read request and write
request packets.
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 is typically implemented on some portion of a
processor multifunction (PMF) customer-replaceable unit (CRU), an I/O multifunction
(IOMF) CRU, or a ServerNet adapter.
SERVERNET object type. In the Kernel subsystem, the object type for either the $ZSNET
ServerNet subsystem manager process or the ServerNet X fabric or Y fabric.
ServerNet port. A connector used for ServerNet links. Six ServerNet ports are located on a
ServerNet expansion board (SEB).
ServerNet router. An application-specific integrated circuit (ASIC) responsible for providing
interconnection of ServerNet links in a ServerNet system area network (ServerNet
SAN). A ServerNet router is never an end device. A ServerNet router in a NonStop S-
series server has a total of six input and six output ServerNet ports.
ServerNet SAN. See ServerNet system area network (ServerNet SAN).
ServerNet system area network (ServerNet SAN). A wormhole-routed, full-duplex,
packet-switched, point-to-point network designed with special attention to reducing
latency and ensuring reliability. The ServerNet SAN provides the communication path
used for interprocessor messages and for communication between processors and I/O
devices.
ServerNet wide area network (SWAN) concentrator. 1) An HP data communications
peripheral that provides connectivity to an HP 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. (2) A collective term for both
SWAN concentrators and SWAN 2 concentrators when a distinction between the two is
not required.