25
FRÄNKISCHE |
OI WLAN Access Point 100 DATALIGHT
®
Meaning
Abbreviation
Function
Access point
AP
Base station, interface for wireless communication,
end devices are logged in at the access point via WLAN which is
connected to the network by cable, similar to
bridges or switches, layer 2-based
Adaptor
Connects a wired communication device with an AP via WLAN
Advanced Encryption Standard
AES
Freely available encryption algorithm with 128, 192 or 256 bit key
length and 128 bit block size
Basic Service Set
BSS
Originates from the synchronisation of relevant parameters by
several devices
Basic Service Set Identifier
BSSID
Equals either the MAC address of the AP or is created randomly
and clearly identifies each BSS
Cipher
Operating mode in which texts longer than the block cipher length
can be encrypted (e.g., AES)
Client
Connects a wired communication device with an AP via WLAN,
also called repeater or WLAN adaptor
DNS server
Computer (server) carrying out name resolution
Domain Name System
DNS
Carries out the name resolution, i.e., implementation of a host
name into the associated IP address
Extended Service Set
ESS
Combination of several WLAN radio cells into a larger one
Extended Service Set Identifier
ESSID
Connection of several APs into a network requires the same SSID,
which is called ESSID in this case
High Throughput
HT mode
Larger bandwidths and thus larger speeds are possible in HT-40
mode. Range is reduced, speed advantage is only realistic to a
limited extent (IEEE-802.11-n devices required, ideal connection
required)
Independent Basic Service Set
IBSS
IBSS is a closed network without connection to other networks
IPv4 address
Fourth version of the internet protocol, 32-bit address in four
blocks in decimals with 8 bit each, one value range from 0-255 and
separated by periods (xxx.xxx.xxx.xxx)
IPv4 gateway
Connects networks with different protocols with each other, de-
fines the route to the internet
IPv4 netmask
Division between network and address section of the IP address,
computers are in the same network if the address section is the
same (the bits of the netmask which equal “1”)
Channel
The available frequency range in the 2.4 GHz range is divided
into 14 channels for better exploitation, the first 13 are
available in Europe
Local Area Network
LAN
Local network with an expansion of 500 m max., predominantly
domestic area up to small companies
Mode
see pages 5 – 7
Polymer Optical Fibre
POF
Plastic optical fibre
Port
Part of a network address to assign data packages between client
and server. With UDP, the port number of the service is included
which should receive the data
Protocol
Software agreement for data transmission
Reed contact
Magnet contact to reset the device using a reset magnet
Repeater
Signal amplifier expanding the range
5 Glossary