HP-PB 100Base-T Network Adapter Installation and Service Guide (B5427-90001)

34 Glossary
Glossary
E
Ethernet A LAN that uses the
CSMA/CD method of access and
transmits at 10Mbit/s on a bus or
star topology. The IEEE 802.3
standard evolved from Ethernet,
but they are not exactly the same.
Network devices based on both
standards can co-exist on the same
medium, but they cannot exchange
data directly without special
“bilingual” software that can
decode packets of both types. The
drivers for the HP3000 network
cards fit this requirement if
configured correctly.
Ethernet address See station
address.
H
HP-PB HP Precision Bus. Refers
to the hardware I/O architecture.
The precision bus is the bus thru
which these cards communicate
with the CPU and memory.
I
IEEE 802.3u standard Part of
the institute of Electrical and
Electronics Engineers 802 family
of LAN standards. The 802.3u
standard extends the 802.3 MAC
layer to 100MBit/s, and defines a
new family of 100BBit/s physical
layers (layer 1), such as 100Base-
TX, 100Base-T4, or 100Base-FX.
These are connected through a
media independent access layer
(MII).
L
LAN See local area network.
LAN cable The medium through
which data moves in a LAN, LAN
cables come in many types. For
example, thick (10 mm) coaxial
cable, thin (5 mm) coaxial cable,
fiber-optic cable, and shielded or
unshielded twisted-pair cable. The
100Base-T cables are UTP CAT-5
only, even for 10MBit/s operation.
LED See light emitting diode.
light emitting diode A small
light on a device that is often used
to provide status information.
link beat A periodic signal
transmitted in Ethernet and
IEEE 802.3 Type 10Base-T
networks to inform one station of
device of the presence of another. It
also helps verify the integrity of
the network link between them.
(Also called “link test pulse”.)