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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Problems of Copyright Management and Control Technologies Profiling and Data Mining At their most basic copyright management and control technologies might simply be used to provide pricing information, negotiate the purchase transaction, and release a copy of a work for downloading to the customer's computer. Still, from a technological point of view, such systems also have the capacity to be employed for digital monitoring. Copyright owners could for example use the transaction records generated by their copyright management systems to learn more about their customers. Profiles, in their crudest form consisting of basic demographic information, about the purchasers of copyrighted material might be created. Moreover copyright owners could use search agents or complex data mining techniques to gather more information about their customers that could either be used to market other works or being sold to third parties. Fair Use Through the widespread use of copyright management and control systems the balance of control could excessively be shifted in favor of the owners of intellectual property. The currently by copyright law supported practice of fair use might potentially be restricted or even eliminated. While information in analogue form can easily be reproduced, the protection of digital works through copyright management systems might complicate or make impossible the copying of material for purposes, which are explicitly exempt under the doctrine of fair use. Provisions concerning technological protection measures and fair use are stated in the DMCA, which provides that "Since copying of a work may be a fair use under appropriate circumstances, section 1201 does not prohibit the act of circumventing a technological measure that prevents copying. By contrast, since the fair use doctrine is not a defense e to the act of gaining unauthorized access to a work, the act of circumventing a technological measure in order to gain access is prohibited." Also the proposed EU Directive on copyright and related rights in the information society contains similar clauses. It distinguishes between the circumvention of technical protection systems for lawful purposes (fair use) and the circumvention to infringe copyright. Yet besides a still existing lack of legal clarity also very practical problems arise. Even if the circumvention of technological protection measures under fair use is allowed, how will an average user without specialized technological know-how be able to gain access or make a copy of a work? Will the producers of copyright management and control systems provide fair use versions that permit the reproduction of copyrighted material? Or will users only be able to access and copy works if they hold a digital "fair use license" ("fair use licenses" have been proposed by Mark Stefik, whereby holders of such licenses could exercise some limited "permissions" to use a digital work without a fee)?

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Multiple User Dungeons MUDs are virtual spaces, usually a kind of adventurous ones, you can log into, enabling you to chat with others, to explore and sometimes to create rooms. Each user takes on the identity of an avatar, a computerized character.

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Transmission Control Protocol/Internet Protocol (TCP/IP) TCP and IP are the two most important protocols and communication standards. TCP provides reliable message-transmission service; IP is the key protocol for specifying how packets are routed around the Internet. More detailed information can be found here http://www.anu.edu/people/Roger.Clarke/II/Pri...

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