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Glossary
Gigaset SE555 WLAN dsl / en / A31008-M1037-B181-1-7619 / glossary.fm / 27.06.2006
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Public IP address
The public
IP address
(also known as the global IP address) is a network component's
address on the
Internet
. It is assigned by the
Internet service provider
. Devices that cre-
ate a link from a LAN to the Internet, such as the Gigaset SE555 WLAN dsl, have a public
and a
Private IP address
.
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
IP
address
/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 Gigaset SE555 WLAN dsl directs data packets from the
Internet
that are addressed to a particular
Port
to the corresponding port of the appropriate net-
work component. This enables servers within the local network to offer services on the
Internet without them needing a
Public IP address
.
See also:
Virtual server
PPPoA
Point-to-Point Protocol over ATM
PPPoA is a
Protocol
for connecting network components in a local Ethernet network to
the
Internet
via an ATM network.
PPPoE
Point-to-Point Protocol over
Ethernet
PPPoE is a
Protocol
for connecting network components in a local Ethernet network to
the
Internet
via a modem.
Private IP address
The private
IP address
(also known as the local IP address) is a network component's
address within the local network (
LAN
). The network operator can assign any address
he or she wants. Devices that act as a link from a local network, such as the Gigaset
SE555 WLAN dsl, have a private and a
Public IP address
.
Protocol
A protocol describes the agreements for communicating in 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, for example the
TCP/IP
protocols for the
Internet
.
PVC
Permanent Virtual Circuit
A permanent virtual circuit is a logical connection in an ATM network.
Summary of Contents for Gigaset SE555 WLAN dsl
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