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(also called datagrams) are transported by the IP as independent data
packets (even in the case of identical senders and receivers). IP
guarantees neither observance of a particular sequence nor delivery to
the receiver (that is, datagrams can be lost on account of network
overload, for example). There are no receive acknowledgements on the IP
layer.
IP Network
Network based on the Internet Protocol. Every device in the network is
addressed through an IP number.
IP Tunnel
A connection between two subnetworks, which conceals the precise
addresses of the communication partners. At the start of the tunnel, all
data packets receive an additional header that refers to the tunnel end.
Here the external frame is removed and the original data packet is
forwarded to its actual receiver.
L
LAN (Local Area Network)
A spatially restricted network. The most widely used LAN standard is
Ethernet.
→
LED – Light-Emitting Diode
For displaying the operational status of the device and of the connection.
LineCrypt Company Card
Special chip cards with information on closed user groups. Can be
obtained from Deutsche Telekom if required.
N
NetKey Card
SmartCard with
key and a
Certificate for
→
Telekom
TrustCenter is stored on the
→
TCOS Operating System. The private asymmetrical
→
Authentication awarded by the Deutsche
→
NetKey Card.
→
Glossary
17
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