TCP/IP Management Programming Manual

Glossary
HP NonStop TCP/IP Management Programming Manual—529636-001
Glossary-7
extensible structure
extensible structure. In DSM programmatic interfaces, a structure declared for the value of
an extensible structured token. See also extensible structured token. Compare fixed
structure.
extensible structured token. In DSM programmatic interfaces, a token consisting of a
token code and a value that is an extensible structure. Extensible structures can be
extended by adding new fields at the end in later RVUs. Such structures are typically
used to indicate the attributes of an object being operated on and to return status and
statistics information in responses; they can also be used for other purposes. The
token is referenced by a token map that describes the structure to SPI so that SPI can
provide compatibility between different versions of the structure. Compare simple
token.
fabric. A simplified way of representing a complex set of interconnections through which
there can be multiple and (to the user) unknown paths from point to point. The term
fabric is used to refer to the X or Y portion of the ServerNet system area network
(ServerNet SAN), for example the X fabric.
FDDI. See Fiber Distribution Data Interface (FDDI).
Fiber Distribution Data Interface (FDDI). An emerging standard for a network technology
based on fiber optics. FDDI specifies a 100-mbps data rate using 1300-nanometer light
wavelength, and limits networks to approximately 200 km in length, with repeaters
every 2 km or less. The access control mechanism uses token-ring technology.
File Transfer Protocol (FTP). The Internet standard, high-level protocol for transferring files
from one machine to another. Usually implemented as application level programs, FTP
uses the TELNET and TCP protocols. The server side requires a client to supply a
login identifier and password before it will honor requests.
filter. In EMS, a file containing a list of criteria against which incoming event messages can
be compared. The messages are allowed to pass (all criteria met) or not pass (one or
more criteria failed). In the ServerNet LAN Systems Access (SLSA) subsystem (for
NonStop S-series systems), filters are logical entities which allow frames received from
the LAN to be sorted and delivered to a client. In the SLSA subsystem, filters replace
the PORT objects used in K-series systems in the sense that filters are the final
destination for data received from the LAN.
FINGER. A protocol providing a method for retrieving status information about one or all of
the users on a particular system.
fixed structure. In DSM programmatic interfaces, a multifield structure declared for the
value of a simple token. Fields cannot be added to fixed structures in later RVUs.
Compare extensible structure.
forwarding distributor. An EMS distributor process that sends selected event messages to
an EMS collector on another network node. See also distributor.
FTP. See File Transfer Protocol (FTP).