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Glossary
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Gateway
A gateway is a device for connecting networks with completely different architectures
(addressing, protocols, application interfaces etc.). Although it is not totally correct, the
term is also used as a synonym for
Router
.
Global IP address
See
Public IP address
Half duplex
Operating mode for data transmission. Only one side can send and/or receive data at
the same time.
See also:
Full duplex
HTTP proxy
An HTTP proxy is a
Server
that network components use for their
Internet
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:
Switch
,
Bridge
,
Router
,
Gateway
IEEE
Institute of Electrical and Electronic Engineers
The IEEE is an international body for defining network standards, especially for stand-
ardising
LAN
technologies, transfer protocols, data transfer speeds and wiring.
IEEE 802.11
IEEE
802.11 is a standard for wireless LANs operating in the 2.4 GHz or 5 GHz band. In
so-called
Infrastructure mode
, terminals can be connected to a base station (
Access
point
) or they can connect with each other spontaneously (
Ad-hoc mode
).
IGMP
Internet Group Management Protocol
IGMP is an Internet
Protocol
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.
Infrastructure mode
Infrastructure mode is a way of operating wireless local networks (
WLANs
) in which an
Access point
handles the data traffic. Network components cannot establish a direct
connection with each other as is the case in
Ad-hoc mode
.