Installing and Administering HP EISA FDDI/9000 and HP HSC FDDI/9000

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Glossary
fiber optics The technique of using
fiber optic transmitters, receivers,
and cables for the transmission of
data.
Float Signal is placed in the high
impedance state.
fragmentation A process in which
large frames from one network are
broken up into smaller frames that
are compatible with the frame size
requirements of the network to
which they will be forwarded.
fragment In FDDI, pieces of a
frame left on the ring; caused by a
station stripping a frame from the
ring.
frame A Protocol Data Unit (PDU)
transmitted between cooperating
MAC entities on an FDDI ring,
consisting of a variable number of
bytes and control symbols.
G
graded index A characteristic of
fiber optic cable in which the core
refraction index is varied so that it is
high at the center and matches the
refractive index of the cladding at
the core-cladding boundary.
H
header Control information added
at the data source to allow data to
reach its destination. At the
destination, layers corresponding to
those at the source that created the
header read and remove it, so that
only the data reaches the final
destination.
host Generally, any computer on a
network.
Host CPU The main system
processor. The host CPU typically
has its own local bus allowing the
CPU to access cache or local
memory without using the EISA
bus. The host CPU accesses the
EISA bus like any other bus master,
with the exception of a few special
features. The data size of the host
CPU does not determine the EISA
bus size; the CPU can have an 8-,
16-, or 32-bit data bus and still
access the 16- or 32-bit EISA bus.
host name A unique name that
identifies each host machine on a
network.