Glossary
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This hierarchical system of DNS servers is known as the Do-
main Name System. The addresses of the DNS servers at
which the Domain Name Service is to inquire by default gen-
erally are handed over to the PC by the Internet Service Pro-
vider automatically whenever a connection to the Internet is
established.
DOCSIS
abbreviation for Data Over Cable Service Interface Specifica-
tion
DOCSIS is an international standard for data transmission in
a broadband cable network. DOCSIS specifies the interfaces
of cable modems.
DOCSIS was developed by CableLabs, a consortium of cable
network operators, and ratified by the ITU.
The first version of the standard was DOCSIS 1.0. The DOCSIS
2.0 and DOCSIS 3.0 standards contain technical extensions.
A major feature of DOCSIS is its support for channel bundling.
EuroDOCSIS adapted DOCSIS to the European market.
Download
Download designates the transfer of files from the Internet to
a computer.
Dynamic IP Address
A dynamic IP address is an IP address valid only for the dura-
tion 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 IP address. They are
called dynamic because every participant receives a new
public address that has not been assigned yet each time he
or she dials in to the Internet.
