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Glossary

DHCP server

See DHCP

DNS

Domain Name System

DNS permits the assignment of IP addresses to PC or domain names, which 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.

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 DNS server. This in turn knows all the addresses of the PCs in the local network and the next higher DNS server, which again knows addresses in its network and that of higher DNS servers.

DNS server

See DNS

Domain name

The domain name is the reference to one or more web servers on the Internet

(e.g. gigaset.com). The domain name is mapped via the DNS service to the corresponding IP address.

DSL

Digital Subscriber Line

DSL is a data transmission technology in which a connection to the Internet can be run at up to 1.5 Mbps over normal telephone lines. A DSL connection is supplied by an Internet provider. It requires a DSL modem.

Dynamic IP address

A dynamic IP address is assigned to a network component automatically via DHCP. This means that the IP address of a network component can change with every login or at certain intervals.