Gigaset SE551 Manual page 131

DHCP
Dynamic Host Configuration Protocol
DHCP handles the automatic assignment of
developed because in large networks – especially the
addresses is very complex as participants frequently move, drop out or new ones join.
A DHCP Server automatically assigns the connected network components (DHCP
ents) Dynamic IP addresses
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
See DHCP
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 an insecure network
(e.g. the Internet). A DMZ is useful if you want to offer
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
easier to remember. A DNS server must administer this information for each
an Internet 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
See DNS
Domain name
The Domain name is the reference to one or more Web servers on the Internet.
The Domain name is mapped via the
IP addresses
from a defined IP pool range
DNS service to the corresponding
to network components. It was
Internet – the defining of IP
thus saving a great deal of con-
Server services on the Internet
Domain names
IP
Glossary
Cli-
that are
LAN with
address.
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