Internet

The Internet Messenger by Buky Schwartz, located in Holon, Israel
T3 NSFNET Backbone, c. 1992.
ICANN headquarters in the Playa Vista neighborhood of Los Angeles, California, United States.
2007 map showing submarine fiberoptic telecommunication cables around the world.
Packet routing across the Internet involves several tiers of Internet service providers.
Number of mobile cellular subscriptions 2012–2016
As user data is processed through the protocol stack, each abstraction layer adds encapsulation information at the sending host. Data is transmitted over the wire at the link level between hosts and routers. Encapsulation is removed by the receiving host. Intermediate relays update link encapsulation at each hop, and inspect the IP layer for routing purposes.
Conceptual data flow in a simple network topology of two hosts (A and B) connected by a link between their respective routers. The application on each host executes read and write operations as if the processes were directly connected to each other by some kind of data pipe. After the establishment of this pipe, most details of the communication are hidden from each process, as the underlying principles of communication are implemented in the lower protocol layers. In analogy, at the transport layer the communication appears as host-to-host, without knowledge of the application data structures and the connecting routers, while at the internetworking layer, individual network boundaries are traversed at each router.
A DNS resolver consults three name servers to resolve the domain name user-visible "www.wikipedia.org" to determine the IPV4 Address 207.142.131.234
Creating a subnet by dividing the host identifier
This NeXT Computer was used by Tim Berners-Lee at CERN and became the world's first Web server.
Share of population using the Internet. See or edit source data.
Internet users per 100 population members and GDP per capita for selected countries.
Internet users per 100 inhabitants Source: International Telecommunication Union.
Internet users in 2015 as a percentage of a country's population Source: International Telecommunication Union.
'''Fixed broadband Internet subscriptions in 2012
as a percentage of a country's population''' Source: International Telecommunication Union.
'''Mobile broadband Internet subscriptions in 2012
as a percentage of a country's population''' Source: International Telecommunication Union.
Banner in Bangkok during the 2014 Thai coup d'état, informing the Thai public that 'like' or 'share' activities on social media could result in imprisonment (observed 30 June 2014).
Internet users by language<ref name=NIUBL-IWS>{{cite web|url=http://www.internetworldstats.com/stats7.htm|title=Number of Internet Users by Language|archive-url=https://web.archive.org/web/20120426122721/http://www.internetworldstats.com/stats7.htm|archive-date=26 April 2012|website=Internet World Stats, Miniwatts Marketing Group|date=31 May 2011|access-date=22 April 2012}}</ref>
Website content languages<ref name=UofCLBWApril2013>{{cite web|title=Usage of content languages for websites|url=http://w3techs.com/technologies/overview/content_language/all|work=W3Techs.com|access-date=26 April 2013|archive-url=https://www.webcitation.org/66ZQzUXh6?url=http://w3techs.com/technologies/overview/content_language/all|archive-date=31 March 2012|url-status=live}}</ref>

Global system of interconnected computer networks that uses the Internet protocol suite (TCP/IP) to communicate between networks and devices.

- Internet
The Internet Messenger by Buky Schwartz, located in Holon, Israel

174 related topics

Alpha

Diagram of the first internetworked connection

Internet protocol suite

Diagram of the first internetworked connection
An SRI International Packet Radio Van, used for the first three-way internetworked transmission.
Conceptual data flow in a simple network topology of two hosts (A and B) connected by a link between their respective routers. The application on each host executes read and write operations as if the processes were directly connected to each other by some kind of data pipe. After establishment of this pipe, most details of the communication are hidden from each process, as the underlying principles of communication are implemented in the lower protocol layers. In analogy, at the transport layer the communication appears as host-to-host, without knowledge of the application data structures and the connecting routers, while at the internetworking layer, individual network boundaries are traversed at each router.
Encapsulation of application data descending through the layers described in RFC 1122

The Internet protocol suite, commonly known as TCP/IP, is the set of communications protocols used in the Internet and similar computer networks.

Network Packet

Internetworking

Practice of interconnecting multiple computer networks, such that any pair of hosts in the connected networks can exchange messages irrespective of their hardware-level networking technology.

Practice of interconnecting multiple computer networks, such that any pair of hosts in the connected networks can exchange messages irrespective of their hardware-level networking technology.

Network Packet

The most notable example of internetworking is the Internet, a network of networks based on many underlying hardware technologies.

The historic World Wide Web logo, designed by Robert Cailliau.

World Wide Web

World's dominant software platform.

World's dominant software platform.

The historic World Wide Web logo, designed by Robert Cailliau.
A web page displayed in a web browser
A global map of the Web Index for countries in 2014
This NeXT Computer was used by Sir Tim Berners-Lee at CERN and became the world's first Web server.
The World Wide Web functions as an application layer protocol that is run "on top of" (figuratively) the Internet, helping to make it more functional. The advent of the Mosaic web browser helped to make the web much more usable, to include the display of images and moving images (GIFs).
Graphic representation of a minute fraction of the WWW, demonstrating hyperlinks
A screenshot of a web page on Wikimedia Commons
Dynamic web page: example of server-side scripting (PHP and MySQL)
The usap.gov website
The inside and front of a Dell PowerEdge web server, a computer designed for rack mounting
Multiple web servers may be used for a high traffic website; here, Dell servers are installed together to be used for the Wikimedia Foundation.
The results of a search for the term "lunar eclipse" in a web-based image search engine

It is an information space where documents and other web resources can be accessed through the Internet using a web browser.

Example of residential network including VoIP

Voice over IP

Example of residential network including VoIP
Asterisk-based PBX for small business

Voice over Internet Protocol (VoIP), also called IP telephony, is a method and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet.

Documents that are connected by hyperlinks.

Hypertext

Text displayed on a computer display or other electronic devices with references to other text that the reader can immediately access.

Text displayed on a computer display or other electronic devices with references to other text that the reader can immediately access.

Documents that are connected by hyperlinks.
Engineer Vannevar Bush wrote "As We May Think" in 1945 in which he described the Memex, a theoretical proto-hypertext device which in turn helped inspire the subsequent invention of hypertext.
Douglas Engelbart in 2009, at the 40th anniversary celebrations of "The Mother of All Demos" in San Francisco, a 90-minute 1968 presentation of the NLS computer system which was a combination of hardware and software that demonstrated many hypertext ideas.
Ted Nelson gives a presentation on Project Xanadu, a theoretical hypertext model conceived in the 1960s whose first and incomplete implementation was first published in 1998.
Hypertext Editing System (HES) IBM 2250 Display console – Brown University 1969

As implemented on the Web, hypertext enables the easy-to-use publication of information over the Internet.

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Optical networking

Means of communication that uses signals encoded in light to transmit information in various types of telecommunications networks.

Means of communication that uses signals encoded in light to transmit information in various types of telecommunications networks.

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Because it is capable of achieving extremely high bandwidth, it is an enabling technology for the Internet and telecommunication networks that transmit the vast majority of all human and machine-to-machine information.

ARPANET logical map, March 1977

ARPANET

The first wide-area packet-switched network with distributed control and one of the first networks to implement the TCP/IP protocol suite.

The first wide-area packet-switched network with distributed control and one of the first networks to implement the TCP/IP protocol suite.

ARPANET logical map, March 1977
ARPANET access points in the 1970s
First ARPANET IMP log: the first message ever sent via the ARPANET, 10:30 pm PST on 29 October 1969 (6:30 UTC on 30 October 1969). This IMP Log excerpt, kept at UCLA, describes setting up a message transmission from the UCLA SDS Sigma 7 Host computer to the SRI SDS 940 Host computer.
ARPA network map 1973
Internetworking demonstration, linking the ARPANET, PRNET, and SATNET in 1977
ARPANET in a broader context

Both technologies became the technical foundation of the Internet.

Sales from the online iTunes music store, operated by Apple Inc.

Digital music store

For a store that sells musical instruments and related equipment online, see Music store: Online stores

For a store that sells musical instruments and related equipment online, see Music store: Online stores

Sales from the online iTunes music store, operated by Apple Inc.

A digital music store is a business that sells digital audio files of music recordings over the Internet.

Hard drives store information in binary form and so are considered a type of physical digital media.

Streaming television

Hard drives store information in binary form and so are considered a type of physical digital media.

Streaming television is the digital distribution of television content, such as TV shows, as streaming media delivered over the Internet.

Michael Aldrich, pioneer of online shopping in the 1980s.

Online shopping

Michael Aldrich, pioneer of online shopping in the 1980s.
Foodora's home delivery by bicycle in Tampere, Finland
An automated online assistant, with potential to enhance user interface on shopping sites.

Online shopping is a form of electronic commerce which allows consumers to directly buy goods or services from a seller over the Internet using a web browser or a mobile app.