Gigaset SL75 WLAN User Manual page 140

Subnet Mask
IP addresses consist of a fixed network
number and a variable subscriber num-
ber. The network number is identical
for all network subscribers. Which por-
tion of the IP address is the network
number is determined in the subnet
mask. For the subnet mask
255.255.255.0, for example, the first
three parts of the IP address are the net-
work number and the last part the com-
puter number.
Switch
Connects different network elements
(see also Hub). Switch forwards data
packets straight to the network sub-
scriber to which they are addressed.
Symmetric NAT
A symmetric NAT assigns different
external IP addresses and port numbers
to the same internal IP addresses and
port numbers – depending on the
external target address.
T
TCP (Transmission Control Protocol)
Transport protocol. Session-based
transmission protocol: it sets up, moni-
tors and terminates a connection
between sender and recipient for trans-
porting data.
TIM (Traffic Indicator MAP)
List at the access point/WLAN router in
which all WLAN devices are saved.
The access point/WLAN router regularly
sends TIM signals (beacons) that acti-
vate the WLAN devices. The frequency
with which a TIM beacon should be
sent is set at the access point/WLAN
router.
TKIP
Procedure for generating keys for WPA
encryption (see WPA).
TLS (Transport Layer Security)
Protocol for encrypting data transmis-
sions on the Internet. TLS is a superor-
dinated transport protocol.
If you want to set up authentication
with TLS you need a Certificate and
login details.
Toggling
Toggling allows you to switch between
two callers or between a conference
and an individual caller without allow-
ing the waiting caller to listen in.
Transfer Mode
See 802.11.
Transmission rate
Speed at which data is transmitted in
the WLAN. The transmission rate is
measured in data units per unit of time
(Mbit/s).
Transport Protocol
Controls data transport between com-
munication partners (applications).
See also: UDP, TCP, TLS.
U
UDP (User Datagram Protocol)
Transport protocol. Unlike TCP, UDP is
a non session-based protocol. It does
not establish a fixed connection. The
data packets (called datagrams) are
sent as broadcast. The recipient is
solely responsible for making sure the
data is received. The sender is not noti-
fied about whether it is received.
Glossary
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