69
Glossary
SE681 WiMAX / engbt / SE681_FUG_EN_9 / Glossary.fm / 18.5.11
Schablo
ne 201
1_04
_07
Port
Data is exchanged between two applications in a network across a port. The port
number addresses an application within a network component. The combination of
/port number uniquely identifies the recipient or sender of a data packet within
a network. Some applications (e.g. Internet services such as HTTP or FTP) work with
fixed port numbers; others are allocated a free port number whenever they need one.
Port forwarding
In port forwarding, the SE681 WiMAX directs data packets from the Internet that are
addressed to a particular
to the corresponding port of the appropriate network
component. This enables servers within the local network to offer services on the Inter-
net without them needing a public IP address. See also:
Protocol
A protocol describes the agreements for communicating on a network. It contains rules
for opening, administering and closing a connection, as well as about data formats,
time frames and handling possible errors. Communications between two applications
require different protocols at various levels, e.g. the
protocols for the Internet.
Provider
A provider (Internet Service Provider) offers access to the Internet for a fee.
RJ
R
egistered
J
ack. Standardised connection, also known as a modular jack.
Router
A router directs data packets from one local area network (
) to another via the fast-
est route. A router enables the connection between networks of different network tech-
nologies and this is performed on the basis of a common protocol. For example, it can
link a local network with WiMAX technology to the Internet.
RSSI
R
eceived
S
ignal
S
trength
I
ndication. Characteristic value for the signal strength of
radio connections, used by communication devices for the automatic selection of a suit-
able channel.
Server
A server makes services available to other network components (clients). The term
"server" is often used to refer to a PC. However it can also mean an application that
provides a particular service such as
,
or a Web service.
SMTP
S
imple
M
ail
T
ransfer
P
rotocol. The SMTP protocol is a
protocol and regulates
the exchange of electronic post on the Internet. Your
to an SMTP server.
