iTP Secure WebServer System Administrators Guide (Version 7.5+)

NonStop Servlets
for JavaServer
Pages (NSJSP).
NonStop Servlets for JavaServer Pages (NSJSP) are platform-independent server-side programs
that programmatically extend the functionality of Web-based applications by providing dynamic
content from a webserver to a client browser over the HTTP protocol.
nowait mode. In Guardian file-system operations and in some APS operations, the mode in which the called
procedure initiates an input/output (I/O) operation but does not wait for it to complete before
returning control to the caller. In order to make the called procedure wait for the completion of
the operation, the application calls a separate procedure. Compare wait mode.
Open System
Services (OSS).
An open system environment available for interactive or programmatic use with the NonStop
operating system. Processes that run in the OSS environment use the OSS application program
interface (API); interactive users of the OSS environment use the OSS shell for their command
interpreter.
OSS applications. POSIX compliant applications.
OSS. See Open System Services (OSS).
packet. The unit of data sent across a packet-switching network. While some Internet literature uses it to
refer specifically to data sent across a physical network, other literature views the Internet as a
packet-switching network and describes IP datagrams as packets.
PATHMON. The central controlling process for a NonStop TS/MP application.
Pathway. The former name of NonStop TS/MP, a product providing transaction services for persistent,
scalable, transaction-processing applications.
physical layer. Layer 1 in the OSI Reference Model. This layer establishes the actual physical connection between
the network and the computer equipment. Protocols at the Physical Layer include rules for the
transmission of bits across the physical medium and rules for connectors and wiring.
process. A running entity that is managed by the operating system, as opposed to a program, which is a
collection of code and data. When a program is taken from a file on a disk and run in a processor,
the running entity is called a process.
protocol. A formal description of the message formats and rules two or more machines must follow to
exchange messages. Protocols can describe low-level details of machine-to-machine interfaces
(for example, the order in which the bits from a byte are sent across a wire) or high-level exchanges
between application programs (for example, the way in which two programs transfer a file across
the Internet). Most protocols include both intuitive descriptions of the expected interactions and
more formal specifications using finite state-machine models.
QIO subsystem. A product that provides buffers and control blocks for protocol processes, including TCP/IP,
TLAM, and NonStop IPX/SPX running on the same processor.
Request for
Comments (RFC).
The name of a series of notes that contain surveys, measurements, ideas, techniques, and
observations, along with proposed and accepted Internet protocol standards. RFCs are edited
but not referenced. They are available across the Internet.
RFC. See Request for Comments (RFC).
Secure Sockets
Layer (SSL).
A protocol for private communication on the World Wide Web and authentication of a Web
server by a Web client.
server class. A grouping of duplicate copies of a single server program, all of which execute the same object
program.
server process. A process that implements requests for an application and returns replies to the requester.
server programs. In NonStop TS/MP, programs that handle the data manipulation and data output activities for
online transaction processing applications. Server programs are designed to receive request
messages from requester programs; perform the desired operations, such as database inquiries
or updates, security verifications, numeric calculations, or data routing to other computer systems;
and return reply messages to requester programs.
server. A process or set of processes that satisfy requests from Web clients in a clientserver environment.
Simple Mail
Transfer Protocol
(SMTP).
The Internet standard protocol for transferring e-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.
SSL. See Secure Sockets Layer (SSL)..
288 Glossary