Helmholz NETLink 700-881-MPI21 - Glossary

60 NETLink
®
Ethernet Products
12 Glossary
These are explanations of the most important technical terms and
abbreviations from the manual:
128 Bit:
Means in this manual the encoding of WLAN data using a code of 128 bit. That
adds to a total of 3*10^38 different keys
64 Bit: Means in this manual the encoding of WLAN data using a code of 128 bit. That
adds to a total of 1*10^19 different keys
802.11b:
IEEE standard that allows gross transfer rates up to 11Mbps in WLAN
802.11g: IEEE standard, a succeeding model of 802.11b that allows gross transfer rates up
to 54 Mbps in WLAN and that is compatible to 802.11b
Ac-
cessPoint:
Central access point for WLAN devices that are used in the infrastructure mode.
Controls sending and receiving within a radio cell
Ad-hoc: WLAN mode that functions like a peer to peer network in order to connect
WLAN devices directly with each other without the involvement of an access
point
Advanced
PPI
The extension of the PPI protocol of the S7-200 series. Normally only compatible
with CPUs of the S7-22x series and higher
AES:
Advanced Encryption Standard, an encoding standard similar to TKIP for WPA2
ANP
see Auto negotiation
ASCII American Standard Code for Information Interchange describes a character set
that includes the Latin alphabet in upper and lower case, the ten Arabic
numerals, as well as some punctuation marks and control characters
Authen
tication:
Authentication is used to check if a device is device it pretends to be. Example:
NETLink
®
WLAN authenticates itself at the access point
Autobaud Also called "auto sensing," is a function supporting automatic adjustment of the
baud rates in a network
Auto nego-
tiation
ANP describes a function that automatically recognizes and configures com-
munication partners in the network
Autouplink
:
A feature used by switch ports to automatically detect whether they are con-
nected to another switch or to a terminal.
Baudrate
The speed set on a bus system
Bit
Binary digit describes the smallest digital information unit. Defines 0 or 1
Broadcast
Data packet transmitted to all stations in a network
Browser Also known as Web browser, is a program for viewing Internet pages. In addition
to addressing and referencing other positions in the text, a graphical user
interface be displayed, for example Web interface.
BSS: Basic Service Set describes the set-up of at least 2 WLAN stations such as
NETLink
®
WLAN and an access point or a WLAN adapter
BUS Buses are connection systems for electronic components. For example, the MPI
Bus is a connection medium for S7
Byte
A byte denotes a series of 8 bits that constitute a logical data entity
CAT5-TCP-
Kabel
Category 5 Ethernet cable that supports a data rate of 100 Mbps over a distance
of 100 m