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Glossary
Gigaset SX541 WLAN dsl / englisch / A31008-M1025-L101-1-7619 / glossary.fm / 21.07.2005
Schablone 2005_05_02
DHCP
Dynamic Host Configuration Protocol
DHCP handles the automatic assignment of IP addresses to network components. It was
developed because in large networks – especially the Internet – 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 Cli-
ents) Dynamic IP addresses from a defined IP pool range 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 SX541 WLAN dsl includes a DHCP server and uses it to assign automatic 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 (for example a LAN) and an insecure net-
work (for example the Internet). A DMZ is useful if you want to offer Server services on
the Internet which for security reasons are not to be run from behind the firewall or if
Internet applications 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 net-
work components remain secure behind the firewall.
DNS
Domain Name System
The assignment of DNS permits IP addresses to computers or Domain names that are
easier to remember. A DNS server must administer this information for each LAN with
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.
The assignment of domain names to IP addresses on the Internet 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 DNS service to the corresponding IP address.
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