TCP/IP Configuration and Management Manual

Glossary
TCP/IP Configuration and Management Manual—427132-004
Glossary-6
fabric
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.
Fast Ethernet ServerNet adapter (FESA). The FESA supports one Ethernet 10 Base-T or
100 Base-TX connection and communicates with multiple processors through its dual
ServerNet interfaces to the ServerNet fabrics.
FDDI. See Fiber Distribution Data Interface (FDDI).
FESA. See Fast Ethernet ServerNet adapter (FESA).
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 (File Transfer Protocol). See File Transfer Protocol (FTP).
full-duplex mode. The communication mode in which data can be transferred in both
directions simultaneously. In the Session Layer, no data token is needed.
gateway. A special-purpose, dedicated computer that attaches to two or more networks and
routes packets from one to the other. In particular, an Internet gateway routes IP
datagrams among the networks to which is connected. The term is loosely applied to