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Portal:Internet

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The Internet Portal

An Internet kiosk

The Internet is a global system of interconnected computer networks, consisting of millions of private and public, academic, business, and government networks of local to global scope that are linked by copper wires, fiber-optic cables, wireless connections, and other technologies. The Internet appears to its users as a single worldwide network accessible to the general public. The protocol that makes it possible to use the millions of networks composing the Internet as if they were one network is a special type of packet switching known as IP or The Internet Protocol.

A computer that connects to the Internet can access information from a vast number of servers and other computers. An Internet connection also allows the computer to send information through the network; that information may be saved and ultimately accessed by a variety of servers and other computers. Much of the information widely accessible through use of the Internet consists of the interlinked hypertext documents and other resources of the World Wide Web (WWW). Web users typically send and receive information using a web browser. Other software for interacting with computer networks includes specialized programs for electronic mail, online chat, file transfer and file sharing.

Information is moved around the Internet by packet switching using the standardized Internet Protocol Suite (TCP/IP) which defines how packets are moving in any platform especially the transport layer. The Internet Protocol Suite consists of several layers of protocols. The lowest layer (the link layer) deals with protocols that transmit data over specific technologies, such as Ethernet or Wi-Fi. The highest layer (the application layer) supports specific applications, such as e-mail and file transfer. In between are the Internet layer, which provides for transmitting packets over any conceivable technology, and the transport layer, which provides for various services such as reliable delivery of packets or real-time streaming of packets.

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Håkon Wium Lie, Chief technical officer
Opera is a web browser and Internet suite developed by the Opera Software company. Opera handles common Internet-related tasks such as displaying web sites, sending and receiving e-mail messages, managing contacts, IRC online chatting, downloading files via BitTorrent, and reading web feeds. Opera is offered free of charge for personal computers and mobile phones, but for other devices it must be paid for. Features of Opera include high performance, tabbed browsing, page zooming, mouse gestures, and an integrated download manager. Its security features include built-in phishing protection, strong encryption when browsing secure web sites, and the ability to delete private data such as cookies and browsing history by clicking a button. Opera runs on a variety of personal computer operating systems, including Microsoft Windows, Mac OS X, Linux, FreeBSD, and Solaris. Although evaluations of Opera have been largely positive, Opera has had limited success on personal computers. It is currently the fourth most widely used web browser for personal computers, behind Internet Explorer, Mozilla Firefox, and Safari. Opera has a stronger market share, however, on mobile devices such as mobile phones, smartphones, and personal digital assistants.

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Map of Seattle's Wi-Fi nodes
Credit: Seattle WiFi Map Project, Maps

Metropolitan area networks, or MANs, are large computer networks usually spanning a city. They typically use wireless infrastructure or Optical fiber connections to link their sites.

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WikiProjects

Main project: WikiProject Internet

WikiProjects

Related WikiProjects: Blogging • Websites • Early Web History • Internet culture

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Barry Diller in 2005
Barry Diller (born February 2, 1942 in San Francisco, California) is media executive responsible for the creation of Fox Broadcasting Company. Diller is currently the Chairman of Expedia and the Chairman and Chief Executive Officer of IAC/InterActiveCorp, an interactive commerce conglomerate and the parent of companies including ServiceMagic, Home Shopping Network, Ticketmaster, Match.com, Citysearch, LendingTree and CollegeHumor. In 2005, IAC/InterActiveCorp acquired Ask.com, marking a strategic move into the Internet search category. Diller has been on the board of The Coca-Cola Company since 2002. The new headquarters of IAC/InterActiveCorp was designed by Frank Gehry and opened in 2007 at 18th Street and the West Side Highway in Manhattan's Chelsea neighborhood. The western half of the block is dedicated to the building which stands several stories taller than the massive Chelsea Piers Sporting complex just across the West Side Highway. The extra floors guarantee a panoramic Hudson River view from Diller's top-floor office.

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Erik Möller

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Nicholas Negroponte
Computing is not about computers. It is about life. We are discussing a fundamental cultural change: Being digital is not just being a geek or Internet surfer or mathematically savvy child. It is actually a way of living and is going to impact everything.

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Internet topics
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Application layer
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Blog
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English on the Internet
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