User Manual

Psion Teklogix 9160 Wireless Gateway User Manual E-9
Appendix E: Glossary
DHCP
DHCP
The Dynamic Host Configuration Protocol (DHCP) is a protocol specifying how a
central server can dynamically provide network configuration information to
clients. A DHCP server “offers” a “lease” (for a pre-configured period of time—see
Lease Time) to the client system. The information supplied includes the client's IP
addresses and netmask plus the address of its DNS servers and Gateway.
DNS
The Domain Name Service (DNS) is a general-purpose query service used for
translating fully-qualified names into Internet addresses. A fully-qualified name
consists of the hostname of a system plus its domain name. For example,
www is the
host name of a Web server and
www.psionteklogix.com is the fully-qualified name of that
server. DNS translates the domain name
www.psionteklogix.com to some IP address, for
example
66.93.138.219 .
A domain name identifies one or more IP addresses. Conversely, an IP address may
map to more than one domain name.
A domain name has a suffix that indicates which top level domain (TLD) it belongs
to. Every country has its own top-level domain, for example
.de for Germany, .fr for
France,
.jp for Japan, .tw for Taiwan, .uk for the United Kingdom, .us for the U.S.A.,
and so on. There are also
.com for commercial bodies, .edu for educational
institutions,
.net for network operators, and .org for other organizations as well as .gov
for the U. S. government and
.mil for its armed services.
DOM
The Document Object Model (DOM) is an interface that allows programs and
scripts to dynamically access and update the content, structure, and style of
documents. The DOM allows you to model the objects in an HTML or XML
document (text, links, images, tables), defining the attributes of each object and how
they can be manipulated.
Further details about the DOM can be found at the W3C.