Abbreviations and Technical Terms
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Kerberos
Kerberos is an authentication mechanism. This security system uses sym-
metric, cryptographic encryption procedures to provide secure authentica-
tion in TCP/IP data traffic.
The Kerberos program is used to encrypt private data and eliminates the
interception or falsification of keys or data by coding the information using
the DES algorithm. The private keys are stored on the Kerberos server
which is responsible for generating and distributing the session key and for
activating the resources.
LAN
Abbreviation of "
L
ocal
A
rea
N
etwork."
Layer 2
Layer 2 (data link layer) in the seven-layer OSI model for describing data
transmission interfaces.
Layer 2 contains the so-called network access protocol in the LAN. This
protocol controls the access mechanism (for example CSMA/CD in Ether-
net) and MAC addressing.
Layer 3
Layer 3 (network layer) in the seven-layer OSI model for describing data
transmission interfaces.
Layer 3 contains the network protocol, for example IP (Internet Protocol).
This can route data packets accurately on the basis of the address. Devices
that perform this task are known as routers.
LDAP
Abbreviation of "
L
ightweight
D
irectory
A
ccess
P
rotocol."
Simplified protocol for accessing standardized directory systems,
for example, a company directory.
LCD
Abbreviation of "
L
iquid
C
rystal
D
isplay."
Digits, text or graphics display with liquid crystal technology.
LED
Abbreviation of "
L
ight
E
mitting
D
iode."
Cool-light lamp with low power consumption and a range of colors.
