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Glossary
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Global IP address
See
Half duplex
Operating mode for data transmission. Only one side can send and/or receive data at
HTTP proxy
that network components use for their
traffic. All
requests are sent via the proxy.
Hub
A hub connects several network components in a star-topology network by sending all
the data it receives from one network component to all the other network components.
See also:
IEEE
Institute of Electrical and Electronic Engineers
The IEEE is an international body for defining network standards, especially for stand-
ardising
technologies, transfer protocols, data transfer speeds and wiring.
IGMP
Internet Group Management Protocol
IGMP is an Internet
that enables an Internet computer to inform neighbouring
routers that it is a member of a multicast group. With multicasting, a computer can send
content on the Internet to several other computers that have registered an interest in
the first computer's content. Multicasting can, for example, be used for multimedia pro-
grams for media streaming to recipients that have set up multicast group membership.
Internet
The Internet is a wide-area network (
) linking several million users around the
world. A number of
have been created for exchanging data, and these are
known collectively as
protocol stack. All participants on the Internet can be iden-
tified by an
. Servers are addressed by
(e.g. gigaset.com).
Domain names are assigned to IP addresses by the Domain Name Service (
).
These are some of the main Internet services:
u
Electronic mail (e-mail)
u
The World Wide Web (WWW)
u
File transfer (FTP)
u
Discussion forums (Usenet / Newsgroups)
Internet service provider
An Internet service provider offers access to the
for a fee.