Specifications

FRITZ!Box Fon WLAN 7270 178
Glossary
DNS server to be used and of the default gateway. In as-
signing the IP addresses the DHCP server selects from a
prescribed pool of IP addresses.
DNS abbreviation for Domain Name System
A service called Domain Name Service takes care of deter-
mining the IP address for a given domain name. This Do-
main Name Service 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 servers.
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.
DSL modem 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.
DSL router A combination of a DSL modem and a router is called a
DSL router.
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