Fritz! Fon WLAN 7390 Installation, Configuration And Operation page 177

Glossary
DNS
Download
DSL modem
DSL router
FRITZ!Box Fon WLAN 7390
DNS server to be used and of the default gateway. In as-
signing the IP addresses the DHCP server selects from a
prescribed range of IP addresses.
abbreviation for Domain Name System
Domain Name Service takes care of determining the IP ad-
dress for a given domain name. This Domain Name Ser-
vice runs on every computer. It accepts the domain name
entered by a user and inquires about the corresponding IP
address at a DNS server known to the service. If a DNS
server cannot answer the inquiry itself, it can inquire
about the IP address (DNS resolution) at other DNS serv-
ers.
If the Domain Name Service receives negative information
from the DNS server (domain name not known), it can
send inquiries to other DNS servers it knows or return a
corresponding error message to the user. If it receives the
desired IP address instead, the application can use the IP
address to retrieve the destination desired by the user.
This hierarchical system of DNS servers is known as the
Domain Name System. The addresses of the DNS servers
at which the Domain Name Service is to inquire by default
generally are handed over to the computer by the Internet
Service Provider automatically whenever a connection to
the Internet is established. In local networks addresses
can also be assigned via DHCP. Otherwise they must be
entered manually in the TCP/IP settings of the computer
by the user or the system administrator.
Download designates the transfer of files from the Internet
to a computer.
A DSL modem connects a computer to the Internet via the
DSL line. In contrast to the analog modem, a connection
via the DSL modem does not mean that the telephone line
is busy.
A combination of a DSL modem and a router is called a
DSL router.
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