Industrial ETHERNET

Industrial ETHERNET Lexicon
BGP
BLP
Border Gateway Protocol. Interdomain
routing protocol in WAN.
See Bandwidth Length Product
CENELEC
Comité Européen de Normalisation
Elektrotechnique (European Committee
for Electrotechnical Standardization).
Responsible for the harmonization of
electrotechnical standards in the
European Union (e.g. EN 50173, …).
BNC
Bayonet Neill Concelman
A widely used plug connector for
connecting coaxial cables and
transceivers as per 10BASE2; named
after the developers.
CHAP
Challenge Handshake Authentication
Protocol. PPP authentication method.
Passwords are transmitted after being
encoded with a random number.
Compare with PAP.
BootP
BPDU
Bridge
Bootstrap Protocol
A protocol that delivers a statically
allocated IP address to a device
connected to the ETHERNET on the
basis of its MAC address.
Bridge Protocol Data Unit.
A control frame between bridges, used
by Spanning Tree.
A device that works on Layer 2 of
the OSI reference model and connects
2 similar networks to each other.
In this connection, data packets are
transferred from one subnetwork to
another subnetwork through the
analysis of the MAC address.
CLI
Collision
Domain
1. Command Line Interface.
2. Calling Line Idendification
The CSMA/CD access process limits
the runtime of a data package from one
participant to another. Depending on
the data rate, what results is a spatially
limited network, the so-termed collision
domain. The maximum diameter of
collision domain is 5120 m at 10 Mbit/s
(ETHERNET) and 512 m at 100 Mbit/s
(Fast ETHERNET). The full duplex
operation of a connection enables
expansion over this limit value since it
precludes collisions. The precondition
for this is the use of bridges or switches.
Broadcast
Term for transmitting a message to a
group of unspecified receivers.
Concentrator
See Hub.
Browser
Term for software that enables the
viewing and processing of data in the
Internet. The most well-known browsers
are Microsoft Internet Explorer, Netscape,
Mozilla and Opera.
CoS
Connection
Mirroring
Class of Service
A function that enables the copying of
data transmission between 2 ports of a
switch to other ports, in order to have
the data analyzed by an analyzer.
BT
Burst
CCK
Bit Time. Duration of a bit.
Term for a short-term increase in load
that occurs suddenly.
Complentary Code Keying
CCK is used with the 11 Mbps version
of the 802.11-LAN (802.11b) and can
pack several bits into a symbol. Thus
a higher data transmission rate is possible.
Crossover Cable For connecting ETHERNET components
over copper cable, what are required
are either 1:1 wire cables, or crossover
cables. Crossover cables are required for
direct cabling of terminal devices such
as SPS, HMI, etc. or network components
such as hubs, switches, etc. to each
other. If the devices support autocrossing,
one can also use 1:1 wire cables. Pin
allocation of RJ45 plugs in a crossover
cable:
262