Siemens SE505 - Manual (Page 121)

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Glossary
Gigaset SE505 dsl/cable / English / A31008-E505-B100-1-7619 / glossary.fm / 16.07.2003
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
Clients ) Dynamic IP addresses from a defined IP Pool Range thus saving a great deal of
configuration work. It also allows address pools 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 SE505 dsl/cable includes a DHCP Server and so it can automatically assign
IP addresses for the PC's on its local network. For specific PC's you can specify that their
IP addresses 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 a non-secure network
(e.g. 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 network
components remain secure behind the firewall.
DNS
Domain Name System
DNS permits the assignment of IP addresses to computer or
Domain names that are
easier to remember. A DNS Server has to 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.
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 computers in the local network and the next higher Name
Server, which again knows addresses in its network and that of the next Name Server.
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 .
DSL
Digital Subscriber Line
DSL is a data transmission technique in which a connection to the
Internet can be run
at 1.5 Mbps over normal telephone lines. A DSL connection is provided by an Internet
Service Provider . It requires a DSL modem.