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Glossary
Gigaset SE551 WLAN dsl/cable / deutsch / A31008-M1029-B101-1-19 / glossary.fm / 25.10.2006
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DHCP
Dynamic Host Configuration Protocol
DHCP handles the automatic assignment of
to network components. It was
developed because in large networks – especially the
– the defining of IP
addresses is very complex as participants frequently move, drop out or new ones join.
A DHCP Server automatically assigns the connected network components (DHCP
from a defined
thus saving a great deal of con-
figuration work. In addition, the address blocks can be used more effectively: since not
all participants are on the network at the same time, the same IP address can be
assigned to different network components in succession as and when required.
The Gigaset SE551 WLAN dsl/cable includes a DHCP server and uses it to assign auto-
matic IP addresses to PCs in the local network. You can specify that the IP addresses for
certain PCs are never changed.
DHCP Server
DMZ
Demilitarised Zone
DMZ describes a part of a network that is outside the
. A DMZ is set up, as it
were, between a network you want to protect (e.g. a
) and an insecure network
(e.g. the
). A DMZ is useful if you want to offer
services on the Internet
which for security reasons are not to be run from behind the firewall or if Internet appli-
cations do not work properly behind a firewall. A DMZ permits unrestricted access from
the Internet to only one or a few network components, while the other network com-
ponents remain secure behind the firewall.
DNS
Domain Name System
DNS permits the assignment of IP addresses to computers or
that are
easier to remember. A DNS server must administer this information for each
an
connection. As soon as a page on the Internet is called up, the browser
obtains the corresponding IP address from the DNS Server so that it can establish the
connection.
On the Internet the assignment of domain names to IP addresses follows a hierarchical
system. A local PC only knows the address of the local Name Server. This in turn knows
all the addresses of the PCs in the local network and the superordinated Name Servers,
which again know addresses and the next superordinated Name Servers.
DNS server
Domain name
The Domain name is the reference to one or more Web servers on the
The Domain name is mapped via the
DNS
service to the corresponding
