Operation Manual

FRITZ!Box Fon WLAN 7570 vDSL 146
Glossary
Especially effective firewalls go even further, analyzing and
evaluating the contents of the packets and filtering them
according to prescribed rules. Such techniques are includ-
ed in a Stateful Packet Inspection Firewall, for instance.
Firmware The firmware is saved in programmable components within
a device. Through the possibility of updating the firmware
by computer at any time, manufacturers enjoy great flexibil-
ity in reacting to the demands of the operational environ-
ment, integrating new functions requested by customers,
and eliminating errors discovered after production.
Fixed IP address Fixed IP addresses are IP addresses which are permanently
assigned to a computer or another device like a network
printer.
Assigning fixed IP addresses makes sense in cases where a
local network has a sufficiently large pool of IP addresses
available, or when a computer is always supposed to be ac-
cessible at a certain address (such as a web server or an e-
mail server).
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 available
as stand-alone software or are components of some ISDN
data transfer software; simple FTP clients are now included
in many web browsers.
Gateway Gateway is a general term designating an interface between
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.