How the Internet works On the Internet, when you want to retrieve a document from another computer, you request a service from this computer. Your computer is the client, the computer on which the information you want to access is stored, is called the server. Therefore the Internet's architecture is called client-server architecture. A common set of standards allows the exchange of data and commands independent from locations, time, and operating systems through the Internet. These standards are called communication protocols, or the Internet Protocol Suite, and are implemented in Internet software. Sometimes the Internet Protocol Suite is erroneously identified with TCP/IP (Transmission Control Protocol / Internet Protocol). Any information to be transferred is broken down into pieces, so-called packets, and the Internet Protocol figures out how the data is supposed to get from A to B by passing through routers. Each packet is "pushed" from router to router via gateways and might take a different route. It is not possible to determine in advance which ways these packets will take. At the receiving end the packets are checked and reassembled. The technique of breaking down all messages and requests into packets has the advantage that a large data bundle (e.g. videos) sent by a single user cannot block a whole network, because the bandwidth needed is deployed on several packets sent on different routes. Detailed information about routing in the Internet can be obtained at http://www.scit.wlv.ac.uk/~jphb/comms/iproute.html. One of the Internet's (and of the Matrix's) beginnings was the ARPANet, whose design was intended to withstand any disruption, as for example in military attacks. The ARPANet was able to route data around damaged areas, so that the disruption would not impede communication. This design, whith its origin in strategic and military considerations, remained unchanged for the Internet. Yet the design of the ARPANet's design cannot be completely applied to the Internet. Routing around depends on the location of the interruption and on the availability of intersecting points between networks. If, for example, an E-mail message is sent from Brussels to Athens and in Germany a channel is down, it will not affect access very much, the message will be routed around this damage, as long as a major Internet exchange is not affected. However, if access depends on a single backbone connection to the Internet and this connection is cut off, there is no way to route around. In most parts of the world the Internet is therefore vulnerable to disruption. "The idea of the Internet as a highly distributed, redundant global communications system is a myth. Virtually all communications between countries take place through a very small number of bottlenecks, and the available bandwidth isn't that great," says Douglas Barnes. These bottlenecks are the network connections to neighboring countries. Many countries rely on a one single connection to the Net, and in some places, such as the Suez Canal, there is a concentration of fiber-optic cables of critical importance.

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History: European Tradition Only in Roman times the first rights referring to artistic works appeared. Regulations resembling a lasting exclusive right to copy did not occur until the 17th century. Before copyright was a private arrangement between guilds able to reproduce copies in commercial quantities. In France and Western European countries "droits d'auteur" or author's rights is the core of what in the Anglo-American tradition is called copyright. Such rights are rooted in the republican revolution of the late 18th century, and the Rights of Man movement. Today in the European system the creator is front and center; later exploiters are only secondary players. France During the 18th century France gradually lost the ability to restrict intellectual property. Before the Revolution, all books, printers and booksellers had to have a royal stamp of approval, called a "privilege". In return for their lucrative monopoly, the French guild of printers and booksellers helped the police to suppress anything that upset royal sensibilities or ran contrary to their interests. Still there were also a whole lot of underground printers who flooded the country with pirated, pornographic and seditious literature. And thousands of writers, most at the edge of starvation. In 1777 the King threatened the monopoly by reducing the duration of publisher's privileges to the lifetime of the authors. Accordingly a writer's work would go into the public domain after his death and could be printed by anyone. The booksellers fought back by argumenting that, no authority could take their property from them and give it to someone else. Seven months later, in August 1789, the revolutionary government ended the privilege system and from that time on anyone could print anything. Early in 1790 Marie-Jean-Antoine-Nicolas de Caritat, Marquis de Condorcet proposed giving authors power over their own work lasting until ten years after their deaths. The proposal - the basis for France's first modern copyright law - passed in 1793.

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Copyright Management and Control Systems: Post-Infringement Post-infringement technologies allow the owners of copyrighted works to identify infringements and thus enhance enforcement of intellectual property rights and encompass systems such as: Steganography Applied to electronic files, steganography refers to the process of hiding information in files that can not be easily detected by users. Steganography can be used by intellectual property owners in a variety of ways. One is to insert into the file a "digital watermark" which can be used to prove that an infringing file was the creation of the copyright holder and not the pirate. Other possibilities are to encode a unique serial number into each authorized copy or file, enabling the owner to trace infringing copies to a particular source, or to store copyright management information. Agents Agents are programs that can implement specified commands automatically. Copyright owners can use agents to search the public spaces of the Internet to find infringing copies. Although the technology is not yet very well developed full-text search engines allow similar uses. Copyright Litigation While not every infringement will be the subject of litigation, the threat of litigation helps keep large pirate operations in check. It helps copyright owners obtain relief for specific acts of infringement and publicly warns others of the dangers of infringement.

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Basics: Acquisition of Copyright The laws of almost all countries provide that protection is independent of any formalities. Copyright protection then starts as soon as the work is created.

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Expert system Expert systems are advanced computer programs that mimic the knowledge and reasoning capabilities of an expert in a particular discipline. Their creators strive to clone the expertise of one or several human specialists to develop a tool that can be used by the layman to solve difficult or ambiguous problems. Expert systems differ from conventional computer programs as they combine facts with rules that state relations between the facts to achieve a crude form of reasoning analogous to artificial intelligence. The three main elements of expert systems are: (1) an interface which allows interaction between the system and the user, (2) a database (also called the knowledge base) which consists of axioms and rules, and (3) the inference engine, a computer program that executes the inference-making process. The disadvantage of rule-based expert systems is that they cannot handle unanticipated events, as every condition that may be encountered must be described by a rule. They also remain limited to narrow problem domains such as troubleshooting malfunctioning equipment or medical image interpretation, but still have the advantage of being much lower in costs compared with paying an expert or a team of specialists.

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Gottfried Wilhelm von Leibniz b. July 1, 1646, Leipzig d. November 14, 1716, Hannover, Hanover German philosopher, mathematician, and political adviser, important both as a metaphysician and as a logician and distinguished also for his independent invention of the differential and integral calculus. 1661, he entered the University of Leipzig as a law student; there he came into contact with the thought of men who had revolutionized science and philosophy--men such as Galileo, Francis Bacon, Thomas Hobbes, and René Descartes. In 1666 he wrote De Arte Combinatoria ("On the Art of Combination"), in which he formulated a model that is the theoretical ancestor of some modern computers.

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Machine language Initially computer programmers had to write instructions in machine language. This coded language, which can be understood and executed directly by the computer without conversion or translation, consists of binary digits representing operation codes and memory addresses. Because it is made up of strings of 1s and 0s, machine language is difficult for humans to use.

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Economic rights The economic rights (besides moral rights and in some cases also neighboring rights) granted to the owners of copyright usually include 1) copying or reproducing a work, 2) performing a work in public, 3) making a sound recording of a work, 4) making a motion picture of a work, 5) broadcasting a work, 6) translating a work and 7) adapting a work. Under certain national laws some of these rights are not exclusive rights of authorization but in specific cases, merely rights to remuneration.

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