FRITZ!WLAN Repeater N/G
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Glossary
Some firewalls also integrate additional concepts like IP
masquerading and NAT to decouple data traffic by distin-
guishing strictly between the internal and external net-
work.
Especially effective firewalls go even further, analyzing
and evaluating the contents of the packets and filtering
them according to prescribed rules. Such techniques may
also include a Stateful Packet Inspection Firewall, for in-
stance.
Firmware
The firmware is saved in programmable components with-
in a device. Through the possibility of updating the firm-
ware by computer at any time, manufacturers enjoy great
flexibility in reacting to the demands of the operational
environment, integrating new functions requested by cus-
tomers, and eliminating errors discovered after produc-
tion.
FTP
abbreviation for File Transfer Protocol
The File Transfer Protocol allows files to be exchanged be-
tween two computers operating in the Internet. Data ex-
change takes place via an FTP server and what is known as
an FTP client. The more convenient FTP clients are avail-
able as stand-alone software or are components of some
ISDN data transfer software; simple FTP clients are now in-
cluded in many web browsers.
Gateway
Gateway is a general term designating an interface be-
tween two computer networks. Such a network interface
can be realized using a router or a bridge, for instance.
If a computer wants to transfer data packets to a computer
in another network, it must first transmit the packet to the
gateway. To do this, the computer must know the address
of the gateway.
If all packets that cannot be delivered in a local network
always are to be transmitted to their given recipients via
the same gateway, for this purpose the address of the
gateway must be saved as the default gateway in the net-
work settings of the computer.
