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Glossaryhttp proxyAn http proxy is a Server that network components use for their Internet connections.All requests are sent via the proxy.HubA Hub connects several network components in a star-topology network by sending allthe data it receives from one network component to all the other network components.See also Switch, Bridge, Router, GatewayIEEEInstitute of Electrical and Electronic EngineersThe IEEE is an international body for defining network standards, especially forstandardising LAN technologies, transmission protocols and speeds, and wiring.IEEE 802.11IEEE 802.11 is a standard for wireless LAN's in the 2.4 GHz band. In so-calledInfrastructure mode terminals can be connected to a base station (Access point) or theycan connect with each other spontaneously (Ad-hoc mode).Infrastructure modeInfrastructure mode is a way of operating wireless local networks (WLAN), in which anAccess point handles the data traffic. Network components cannot establish a directconnection with each other as is the case in Ad-hoc mode.InternetThe Internet is a wide-area network (WAN) linking several million users around theworld. A number of Protocols have been created for exchanging data, and these areknown collectively as TCP/IP. All parties on the Internet can be identified by an IPaddress. Servers are addressed by a Domain name (e.g. siemens.com). Domain namesare assigned to IP addresses by the Domain Name Service (DNS).Among the most important Internet services are:◆ electronic mail (email)◆ the World Wide Web (WWW)◆ file transfer (FTP)◆ discussion forums (Usenet / Newsgroups)Internet Service ProviderAn Internet Service Provider offers access to the Internet for a fee.IPInternet ProtocolThe IP Protocol is one of the TCP/IP protocols. It is responsible for addressing parties in anetwork using IP addresses, and routes data from the sender to the recipient. It decidesthe paths along which the data packets travel from the sender to the recipient in acomplex network (routing).127