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34 Glossary
Glossary
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 802.3 standard Part of the
institute of Electrical and
Electronics Engineers 802 family
of LAN standards. The 802.3
standard defines the physical layer
(layer 1) and the Medium Access
Control (MAC) portion of the data
link layer (layer 2). The IEEE
802.3 standard evolved from
Ethernet, but the two networks are
not fully compatible with each
other.
IEEE 802.5 standard Part of the
institute of Electrical and
Electronics Engineers 802 family
of LAN standards. The 802.5
standard defines the physical layer
(layer 1) and the Medium Access
Control (MAC) portion of the data
link layer (layer 2). Used with
Token Ring networks.
IEEE 802.12 standard Part of
the institute of Electrical and
Electronics Engineers 802 family
of LAN standards. The 802.12
standard defines the physical layer
(layer 1) and the Medium Access
Control (MAC) portion of the data
link layer (layer 2).
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
100VG-AnyLAN cables are
typically UTP CAT-3 or CAT-5.