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Glossary
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http proxy
An HTTP proxy is a Server that network components use for their Internet connections.
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 Electronics Engineers
IEEE is an international body for defining network standards, especially for
standardizing LAN technologies, transmission protocols and speeds, and wiring.
IEEE 802.11
IEEE 802.11 is a standard for wireless 2.4-GHz band LANs. In so-called Infrastructure
mode end devices can be connected to a base station (Access point) or connect with
each other spontaneously (Ad-hoc mode).
Infrastructure mode
Infrastructure mode is a way of operating wireless local networks (WEP), 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.
Internet
The Internet is a wide-area network (WAN) linking several million users around the
world. A number of Protocols have been defined for exchanging data known by the
name TCP/IP. All participants in the Internet are identifiable by an IP address. Servers are
addressed by a Domain name (e. g. siemens.com). Domain Name Service (DNS) is used
to assign Domain names to IP addresses.
Among the most important Internet services are:
◆ electronic mail (email)
◆ the World Wide Web (WWW)
◆ file transfer (FTP)
◆ discussion forums (Usenet / Newsgroups)
Internet Service Provider
An Internet Service Provider offers access to the Internet for a fee.
IP
Internet Protocol
The IP Protocol is one of the TCP/IP protocols. It is responsible for the addressing of
participants in a network using IP addresses and routes data from the sender to the
recipient. It decides the paths along which the data packets travel from the sender to
the recipient in a complex network (routing).
IP address
An IP address is a network-wide unique address of a network component in a network
based on the TCP/IP protocol (e. g. in a local network (LAN) or on the Internet). The IP
address has four parts (decimal numbers) separated by periods (e. g. 192.168.2.1). The
IP address comprises the network number and the computer number. Depending on the
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