Glossary
FRITZ!Box Fon WLAN 7570 vDSL
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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.
