Specifications

Glossary
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Dynamic DNS abbreviation for Dynamic Domain Name System
Dynamic DNS is a service which allows a computer always
to be reached under the same domain name despite con-
stantly changing IP addresses. This means that even pri-
vate users have an economical way of placing their own
Internet offers on their computer 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 ad-
dress and the notification of the new IP address, the com-
puter 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 partici-
pants who dial in to the Internet receive a dynamic IP ad-
dress. They are called dynamic because every participant
receives a new public address that has not been assigned
yet each time she or he dials in to the Internet.
By contrast, dynamic addresses are usually used in local
IP networks because they are easy to handle, and because
using them avoids incorrect IP address entries or uninten-
tional double assignments. The DHCP service is responsi-
ble for assigning unique dynamic IP addresses.
FAQ abbreviation for Frequently Asked Questions
FAQs are collections with answers to frequently asked
questions on a certain subject area.
fixed IP address Fixed IP addresses are IP addresses which are permanent-
ly assigned to a computer or another device like a network
printer.
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