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Glossary
Gigaset SE366 WLAN / englisch / A31008-M1063-R101-4x-7619 / glossary.fm / 13.11.2008
Schablone 2004_12_27
NAT
Network Address Translation
NAT is a method for converting IP addresses (Private IP addresses) within a network into
one or more Public IP addresses on the Internet. With NAT several network components
in a LAN can share the router's public IP address to connect to the Internet. The network
components on the local network are hidden behind the router's IP address, which is
registered on the Internet. Because of this security function, NAT is frequently used as
part of a network Firewall. If you want to make services on a PC in the local network
available on the Internet despite NAT, you can configure the Gigaset SE366 WLAN as a
Virtual server.
Network
A network is a group of devices connected in wired or wireless mode so that they can
share resources such as data and peripherals. A general distinction is made between
local area networks (LANs) and wide area networks (WANs).
Network adapter
A network adapter is the hardware device that creates the connection between a net-
work component and a local network. The connection can be wired or wireless. An Eth-
ernet network card is an example of a wired network adapter. The Gigaset PC Card 300
and the Gigaset USB Adapter 300 are examples of wireless network adapters.
A network adapter has a unique address, the MAC address.
Public IP address
The public IP address (also known as global IP address) is a network component's
address on the Internet. It is assigned by the Internet Provider. Devices that create a link
from a LAN to the Internet, such as the Gigaset SE366 WLAN, 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 SE366 WLAN directs data packets from the Internet that
are addressed to a particular Port to the corresponding port of the appropriate network
component. This enables servers within the local area network to offer services on the
Internet without them needing a Public IP address.
See also: Virtual server