7-2 Internet applications
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tion between the times you visit the same
web site. When you accept cookies, the server
is able to store and use information about
your actions on the visited web site.
Domain name and Host name
Terms “domain name” and “host name” are
sometimes, slightly inaccurately, used as syn-
onyms. In a fully qualified domain name (e.g.,
www.club.nokia.com), the first part of the
name is the name of the host and the follow-
ing parts are names of domains to which the
host belongs. Each host name corresponds to
a certain IP address (see below). Host names
are used because they are easier to remember
than IP addresses.
Hypertext Markup Language (HTML)
A language used to define WWW documents’
appearance and content.
Hypertext Transfer Protocol (HTTP)
A document transfer protocol used in the
WWW system.
Images (Inline, External)
Images within a fetched WWW page are in-
line images. Larger images are often placed as
external images and have to be viewed sepa-
rately.
Internet Access Point
Where your communicator connects to Inter-
net by way of a data call. An Internet access
provider can be, for example, a commercial In-
ternet service provider or your own company.
Internet Mail Access Protocol, version 4
(IMAP4)
A protocol used for accessing the remote
mailbox.
Internet Protocol (IP) address
All computers and other devices connected to
the Internet using the Internet Protocol have
their own individual addresses. The address
consists of four numbers separated by full
stops: for example, “131.227.21.167.”
Multipurpose Internet Mail Extensions (MIME)
A standard Internet format which permits in-
cluding multiple mail objects in a single mes-
sage. The mail objects can be, for example,
formatted multifont text messages and non-
textual elements, such as images and audio
fragments.
Plug-in
A plug-in is add-on software that can be
downloaded from the WWW. The communica-
tor uses plug-ins to display a document that
the WWW application itself cannot show. See
”Plug-ins” on page 7-15.
Point to Point Protocol (PPP)
A common networking software protocol
making it possible for any computer with a
modem and a phone line to connect directly
to the Internet.
Post Office Protocol, version 3 (POP3)
Another common mail protocol that can be
used for accessing the remote mailbox.
Protocol
A formal set of rules that govern how data is
transferred between two devices.
Proxy
In some networks, the connection between
the WWW application and the resource you
want to connect to is blocked by a firewall.
The firewall protects the internal network
from unauthorised external access. A proxy is
an intermediary program which enables ac-
cess through the firewall. A proxy can also
serve as a network “cache”, which speeds up
the fetching process.
Simple Mail Transport Protocol (SMTP)
An Internet protocol governing the transfer of
electronic mail.
