Glossary
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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 PC 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 PC by the
user or the system administrator.
download
Downloading files from the Internet
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.
dynamic DNS
abbreviation for Dynamic Domain Name System
Dynamic DNS is a service which allows a PC always to be
reached under the same domain name despite constantly
changing IP addresses. This means that even private
users have an economical way of placing their own
Internet offers on their PC at home.
It works by transmitting the current IP address to a special
DDNS server each time the IP address changes. Except for
the few seconds between the cancellation of the old IP
address and the notification of the new IP address, the
computer can always be reached at the selected domain
name.
dynamic IP
address
A dynamic IP address is an IP address valid only for the
duration of one Internet or network session.
Every computer participating in the Internet must have a
uniquely assigned public IP address. Since only a limited
number of such IP addresses is available, they must be
used sparingly. That is why most of the Internet
participants who dial in to the Internet receive a dynamic
