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Glossary
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Network protocol
The network protocol is the standard via which different PCs exchange data in a net-
work. A connection can only be established between PCs in a network if they all use
the same protocol. The
network protocol is the most extensive network proto-
col, which is also used for connections to the Internet. This must be set up on each PC
from which a network connection is to be established.
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 SE680 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.
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