Siemens Gigaset SE361 WLAN User Manual page 103

Glossary
Client
A client is an application that requests a service from a server. For example, an HTTP cli-
ent on a PC in a local network requests data, i.e. Web pages, from an HTTP server on the
Internet. Frequently the network component (e.g. the PC) on which the client applica-
tion is running is also called a client.
Connect on demand
Connect on demand means that applications such as a Web browser, Messenger and
E-mail automatically open an Internet connection when they are launched. This can
lead to high charges if you are not using a Flat rate. This function can be deactivated at
the Gigaset SE361 WLAN to save call charges.
DHCP
Dynamic Host Configuration Protocol
DHCP handles the automatic assignment of IP addresses to network components. It was
developed due to the fact that in large networks – especially the Internet – defining 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, it also allows address blocks to 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 SE361 WLAN includes a DHCP server and can automatically assign 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
Demilitarized Zone, see also Exposed Host
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 is useful if you want to offer Serverservices on the Internet
which, for security reasons, will not run behind the firewall, or if Internet applications
do not function correctly behind a firewall. A DMZ permits unrestricted access from the
Internet to only one or a few network components, while the other network compo-
nents remain secure behind the firewall.
103