Technical data

forwarder server
The name server that processes recursive requests that a slave server cannot
resolve locally; has access to the Internet. See also BIND server, cache server,
primary server, secondary server,andslave server.
forwarding information base
The table that GATED uses internally to store routing information it learns from
routing protocols is a routing table; also known as a routing information base, or
RIB. The routing table is used to collect and store routes from various protocols.
forwarding table
The table in the kernel that controls the forwarding of packets is a forwarding
table, also known as a forwarding information base, or FIB.
FQDN
See fully qualified domain name.
fragment
A piece of a packet that results from a router dividing an IP datagram into
smaller pieces for transmission across a network that cannot handle the original
datagram size. Fragments use the same format as datagrams; fields in the IP
header declare whether a datagram is a fragment and, if so, where the data in the
fragment occurred in the original datagram. IP software at the receiving end must
reassemble the fragments. See also maximum transmission unit.
fragmentation
The IP process of breaking up packets into smaller packets for transmission; allows
a packet originating in a network that allows a large packet size to traverse a
network that limits packets to a smaller size. The destination host reassembles the
fragments. See also maximum transmission unit.
frame
A Data Link layer packet that contains the header and trailer information required
by the physical medium.
FTP
See File Transfer Protocol.
full-duplex circuit
Acircuitdesignedfortransmissioninbothdirectionsatthesametime.Contrast
with half-duplex circuit.
full-duplex transmission
Data transmission in both directions at the same time. Contrast with half-duplex
transmission.
fully qualified domain name (FQDN)
Thefullsitenameofasystem,suchas
scryber.enet.dec.com
rather than
justthehostnameof
scryber
.
function code
A parameter in a $QIO system service call that defines the specific function of
that $QIO.
GATED
A routing daemon that can be configured to route one or more of the following
protocols: RIP, BGP, EGP, and OSPF.
Glossary–18