Siemens SX763 - Manual (Page 138)

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Glossary
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DNS
Domain Name System
DNS permits the assignment of 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.
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 superordinate name servers,
which again know addresses or the next superordinate 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 .
DoS attack
Denial of Service
A DoS attack is a particular form of hacker attack directed at computers and networks
with a connection to the
Internet . The aim is not so much to steal data but to paralyse
the computer or network so severely that the network resources are no longer available.
A typical hacker attack involves making a remote computer announce that it is acting for
the paralysed computer, for example, and receive the data intended for you.
DSL
Digital Subscriber Line
DSL is a data transfer 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 serv-
ice provider . It requires a DSL modem.
Dynamic IP address
A dynamic
IP address is assigned to a network component automatically by DHCP . This
means that the IP address of a network component can change with every login or at
certain intervals.
See also:
Static IP address