Portal:Internet

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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Analog Telephony Adapter Grandstream HT488
Credit: Lzur

Voice over Internet Protocol (VoIP) is a protocol optimized for the transmission of voice through the Internet or other packet switched networks. VoIP is often used abstractly to refer to the actual transmission of voice (rather than the protocol implementing it). VoIP is also known as IP Telephony, Internet telephony, Broadband telephony, Broadband Phone and Voice over Broadband. "VoIP" is pronounced voyp.

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WikiProjects

Main project: WikiProject Internet

WikiProjects

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

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Selected biography

Al Gore, Official portrait, 1994
Albert Arnold "Al" Gore, Jr. (born March 31, 1948) was the forty-fifth Vice President of the United States, serving from 1993 to 2001 under President Bill Clinton. Gore previously served in the U. S. House of Representatives (1977-85) and the U. S. Senate (1985-93), representing Tennessee. He was the Democratic Party presidential nominee in the 2000 election, and shared the 2007 Nobel Peace Prize with the Intergovernmental Panel on Climate Change for his work as an environmental activist. Gore has been involved with the development of the Internet since the 1970s, first as a Congressman and later as Senator and Vice-President. His High Performance Computing and Communication Act of 1991 (often referred to as the Gore Bill) was passed on December 9, 1991 and led to the National Information Infrastructure (NII) which Gore referred to as the "information superhighway." Leonard Kleinrock, a key player in the development of the ARPANET, considers the act to be a critical moment in Internet history. Internet pioneers Vint Cerf and Bob Kahn stated in the 2000 article "Al Gore and the Internet", that Gore was "the first political leader to recognize the importance of the Internet and to promote and support its development."

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Pete Ashdown

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Jerrold Nadler
I rise today to support the efforts of citizens everywhere to protect free speech on the Internet. Today, the Supreme Court heard arguments to determine the constitutionality of the Communications Decency Act [CDA], which criminalizes certain speech on the Internet. It is because of the hard work and dedication to free speech by netizens everywhere that this issue has gained the attention of the public, and now, our Nation's highest court. I have maintained from the very beginning that the CDA is unconstitutional, and I eagerly await the Supreme Court's decision on this case.

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Internet topics
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Application layer
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English on the Internet
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History of the Internet
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HyperCard
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Internet Control Message Protocol
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Internet Protocol
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Mosaic (web browser)
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List of basic Internet topics
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Comp.* hierarchy
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  This article uses material from the Wikipedia page available here. It is released under the Creative Commons Attribution-Share-Alike License 3.0.


Portal:Internet



 
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