Gigaset C530 ip User Manual page 149

Glossary
DMZ (Demilitarised Zone)
DMZ describes a part of a network that is outside the firewall.
A DMZ is set up, as it were, between a network you want to protect (e.g. a LAN) and a non-
secure network (e.g. the Internet). A DMZ permits unrestricted access from the Internet to
only one or a few network components, while the other network components remain secure
behind the firewall.
DNS
Domain Name System
Hierarchical system that permits the assignment of IP addresses to Domain Names that are
easier to memorise. This assignment has to be managed by a local DNS server in each
(W)LAN. The local DNS server determines the IP address, if necessary by enquiring about
superordinate DNS servers and other local DNS servers on the Internet.
You can specify the IP address of the primary/secondary DNS server.
See also: DynDNS.
Domain Name
Name of one (of several) web server(s) on the Internet (e.g. Gigaset.net). The domain name is
assigned to the relevant IP address by DNS.
DSCP
Differentiated Service Code Point
See Quality of Service (QoS).
DSL
Digital Subscriber Line
Data transfer technology which allows Internet access of e.g. 1.5 Mbps over conventional
phone lines. Prerequisites: DSL modem and the appropriate service offered by the Internet
provider.
DSLAM
Digital Subscriber Line Access Multiplexer
The DSLAM is a switch cabinet in an exchange where all subscriber connectors converge.
DTMF
Dual Tone Multi-Frequency
Another description for dual tone multi-frequency dialling (DTMF).
Dynamic IP address
A dynamic IP address is assigned to a network component automatically via DHCP. The
dynamic IP address for a network component can change every time it registers or at certain
time intervals.
See also: Fixed IP address
DynDNS
Dynamic DNS
Domain names and IP addresses are assigned via DNS. For Dynamic IP addresses this service
is enhanced with "Dynamic DNS". This permits the use of a network component with a
dynamic IP address as a Server on the Internet. DynDNS ensures that a service can always be
addressed on the Internet under the same Domain Names irrespective of the current IP
address.
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