TCP/IPv6 Migration Guide

Glossary
HP NonStop TCP/IPv6 Migration Guide—524524-004
Glossary-8
failover brother
failover brother. The other SUBNET associated with the first SUBNET in a failover-enabled
configuration.
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 (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. Gateways route packets to
other gateways until they can be delivered to the final destination directly across one
physical network. The term is loosely applied to any machine that transfers information
from one network to another, as in “mail gateway.”
Gateway to Gateway Protocol. The protocol core gateways used to exchange routing
information, GGP implements a distributed shortest path routing computation. Under
normal circumstances, all GGP participants reach a steady state in which the routing
information at all gateways agrees.