Internet
Computer Networking World consists of a set of national, regional and private that are connected by the Protocol communication TCP / IP and cooperate to provide a single interface to their users.
The ambition of the Internet is expressed in one sentence: interconnect all computers the world. Like the phone who can converse with anyone with a known number, the Internet is a global exchange of electronic documents including text, files, images, sound and visual sequences. This alliance of thecomputer and telecommunications: the Telematics the true sense. Internet users are referred to as Internet users, Internet users mean, surf or surf net. As the information network, they are accessible from "places" that are known as websites.
A network of first military
In the CyberspaceWhen we think of 1969, these are not images of Woodstock come to mind. For Internet users, 1969 is the year of birth of the Net.
It started with the establishment of a communication standard foolproof: TCP /IP. This cuts the message into packets that go in all directions before redial on arrival. A brilliant idea, developed at the request of the Pentagon at the time the Cold War and that has grown exponentially and so fruitful. Indeed, the U.S. government since the 50s, wondering how to protect the state apparatus against possible Soviet nuclear attack.
The solution came from the Rand Corporation, the Group of Experts of the Cold War. In 1964 a researcher named Paul Baran proposes to establish a network of communication that have no center. If that network had a hotspot, a heart which had been centralized all decisions, the Soviets would certainly have pointed Sufis Missile to destroy twenty-five times.
It was therefore suggested to establish a series of nodes (nodes) all equal and all connected to each other, so that even if several of them were destroyed, the network remains functional.
At first, an agency of the U.S. Department of Defense, the Advanced Research Projects Agency (ARPA), which supports the establishment of the first sections of this decentralized network that would link researchers from universities, industry and the Department of Defense.
Thus was born in December 1969, the ARPANETConsisting of four knots (three in California and one in Sak Lake City). And scientific
Originally the network was expected to allow researchers to Arpa very seriously calculations remotely on Software they lacked, but their colleagues at the other end of the country, could have on their computers.
During the 70s, however, researchers connected to the Arpanet have found a new utility grid. He began to correspond with their colleaguesOn their research and then, gradually, forming friendships, the network used to exchange more personal advice to the latest jokes about Richard Nixon ... In 1972, the first list of dissemination e was created: SF-Lovers, on the science-fiction. The exhilaration of the emerging network largely explains the popularity of the Internet today. For the first time, machines had "human face".
Very quickly, the good news spread. American universities are gradually connected to the network, each node becomes a new and profiting by the occasion, published the work of its researchers on his repertoire FTP (File Transfer Protocol). Over the years, Arpa gradually loses control over the network development. Researchers from all NATO countries join their U.S. counterparts. In 1983, ARPANET stands out from the rest of the network, which became the Internet, or Interconnected Network International Network. Therefore, it is the National Science Foundation (NSF) U.S. which finances the so-called Backbone, Spinal cord network. Then, other agencies, such as NASA or research agencies of other countries, to companies like AT & T connect their own networks of communication on this backbone.
The boom Net In the 90 years the Internet has become the general public by means of a consultation system easy: the World Wide Web (WWW). The number of computers Guest the network doubled every year until 1994 and then grow exponentially in 1995. The number of users now fluctuates between 90 and 120 million, about the sites available, they would exceed the 1 000 000 compared to 20 to 000 services available through 3615 Minitel ! Between weather, Appeared Mosaic and Netscape Navigator, first software movement, called viewers, or even browsers. The general public takes the Net. Research systems are emerging, including the now famous Yahoo! For millions of computer users equipped with Modems discovered they could access the desired information with a single mouse click. By the way television programs which are of such variety that everyone can find happiness, the "Web" actually seems to know no limits. The network, initially limited to U.S. academics, has naturally been an incredible expansion. Internet and World Wide Web have become the new standard for a computer that had never been before.
Not content to offer the world's largest library of texts, sounds and images of all time, they become the implicit support of many futuristic applications: videophone, Electronic commerce, multi-user games ... Nobody had expected such an explosion and there are many experts who agree that we have not seen anything yet. If it is difficult to imagine the borders to the Internet, it's probably because for the first time, each user can become a transmitter of information - and not just consumers. What system can boast of hosting such a creative potential?
Today, the recurrent problem for the speed of loading pages, and transmission of information: cables increasingly crowded Internet for more and more. Technologies evolve and new ones appear: the ISDN, L 'ADSL (which allows a conventional telephone line, CTSTo achieve transfer speeds 10 times greater than current systems) and satellite. Then another problem with the quality of the network, more and more polluted by the spam, virus, trojan and other spyware. For several years, we hear the name of INTERNET 2. This is a test network in the U.S., which will be in a few years, the successor of the net current network clarified, orderly and secure.
Internet Storm Center
Website Web independent with the threats list computer Recent: virus, Software flaws and vulnerabilities Various studies are also available.
Intranet
LAN and private (business) that uses the technology of theInternet : Web, e-mail, etc.. But does not open connections to the public contrary to the Internet.
Intrusion Prevention System
IPS : Intrusion prevention system. Safe computerSystem that ensures monitoring of network traffic and alerts administrators of intrusion attempts or the existence of trafficking suspect.
One element of the IPS is firewal (Firewall).
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