peer-to-peer
(or P2P) computer network is a network that relies primarily on the computing power and bandwidth of the participants in the network rather than concentrating it in a relatively low number of servers. P2P networks are typically used for connecting nodes via largely ad hoc connections. Such networks are useful for many purposes. Sharing content files (see file sharing) containing audio, video, data or anything in digital format is very common, and realtime data, such as telephony traffic, is also passed using P2P technology.P2P networks. The one of the connectors between us and another party in the cyber world. We depend on such networks mainly for the sharing of files. These include music, videos and other files mentioned above. This method greatly enhances the quality of connectivity among people as well as decreasing the time and effort to send documents to one another.
User-Dependancy
P2P networks involve all clients to provide resources, including bandwidth, storage space, and computing power to continue its growth. Perhaps this "user-dependancy" factor is the main ingredient behind its success. As demand on the system increases, the total capacity of the system also increases. Thus, the working principle behind this technology would be the more, the merrier; as the number of users increase, so does the quality of the network, therefore, benefiting every one of the users.
Multiple Sources
P2P networking enables peers to find the data without relying on a centralized index server. This means that a user does not have to rely on one particular source from the server for his/her download as there are many sources available. For example, a download can still continue if a file-sharer is offline and if other users have the same file. This greatly improves the availability of a product. Taking Napster as a case study, its great achievement is due to the fact that it is being empowered by the peers in association with a central index, which made it fast and efficient to locate available content. The peer protocol was just a common way to achieve this. In the case of Napster, having more users would mean that the probability of locating a file increases, increasing the efficiency of work and reducing the time and effort needed to locate the file.
The Disadvantages
1. Unavoidable Attacks
Like many other programs or softwares, there are bound to be those who have different motives of using it. P2P networks, for example, are the victim of irresponsible users who cause harm to the other users. Perhaps the most common attack faced by many would be poisoning attacks. This means providing files whose contents are different from the description for the purpose of making another's life difficult. Such actions are hard to prevent by both the user and the authorities of the network and this poses a huge threat to unsuspecting users. Children, for example, might be misled into downloading what they think is a harmless video, but is in fact a video with undesirable content. In short, it is a place where there is no control on the content and that too much of everything is available. Another common misuse would be the insertion of viruses to carried data. Downloaded or carried files may be infected with viruses or other malware. This abuse is hard to track down due to the huge numbers and there is no means to identify the viruses.Careful design of the P2P network and the use of encryption will prevent these attacks from occuring. Many P2P networks, such as Ares Galaxy, enables the use of firewalls to help stamp down such attacks for the benefit of the users.
Piracy
The biggest threat of such P2P networks is that they seem to promote piracy, due to the uncontrolled content it receives. Such networks are unable to detect if a file is copyrighted; even if it is, there will inevitably be hackers who will find a way around it and ensure that the file stays available for everyone, even before its release. This is especially the case for audio files, which contain singles from artists. Abusers will find a way to obtain the singles and release them online early, before the actual release of their album. Having the song free of charge would mean that users will no longer have to purchase the albums of their favourite artists. It also means that the hardwork of such artists will go to waste and the long hours spent on recording and song-writing will be fruitless. According to the RIAA, CD sales dropped by 10% in 2001 and a further 6.8% last year, largely because of file sharing. The organisation has been at the heart of the file-sharing controversy, especially music files in the popular MP3 format uploaded onto the Internet using peer-to-peer software. While the RIAA is agressively trying to put a stop on piracy, many have criticised it being an organisation that controls and inflates the CD prices of EMI, Sony-BMG, Universal Music and Warner. Their vicious attacks against music piracy, however, has not lead to any increase in the number of file-sharing users. According to Digital Music News, the average number of users online simultaneously has more than doubled since the lawsuits began, from 3.8 million in August of 2003 to 8.9 million in June of 2005. Thus, many question the effectiveness of such organisations in the stamping down of pirates.Despite the many fierce battles against piracy in file-sharing networks, there have been artists who tapped on such sharing networks to gain fame and popularity and to allow their music to be heard. Artists who are unknown, and thus most helped by file sharing, are those artists who sell relatively few albums, whereas artists who are harmed by file sharing and thus gain from its removal, the popular ones, are the artists whose sales are relatively high. With the rise in MP3 players, the world will soon see CDs becoming obsolete and MP3 files on the rise. It is then, that this issue will escalate into something more problematic.
The Conclusion
P2P networking has helped many to stay connected with one another. It has also begun to attract attention from scientists in other disciplines, especially those that deal with large datasets such as bioinformatics due to its capability to rely on the computing power and bandwidth of the participants in the network. However, with uncontrolled attacks and piracy problems, networks are facing many threats of termination. It is true that globalisation can bring about connectivity, accessibility and availability but we must also realise that it can be detrimental to the future of other groups of people as well.
Sunday, May 13, 2007
Sunday, April 22, 2007
why yes they do!
Technology and globalization go hand-in-hand. Globalization unleashes technology, which in turn drives firms to plan production and sales on a global basis. Technology changes the work we do and in nearly all cases, the jobs created by it demand more education and training. It also changes the way business operates by transforming relationships between suppliers, producers, retailers and customers
Survival in the new global business market calls for improved productivity and increased competition. Indeed, firms that have upgraded their products, used technology skillfully and sought niche markets have not only survived, but prospered. However, the down side of increased productivity is the elimination of many jobs in manufacturing, transportation and other high-paying industries.
Just as globalization presents both challenges and opportunities, so too does technology. Ever since the beginning of the first industrial revolution in the 18th century, the introduction of new technologies has meant both the transfer of jobs from one sector to another (from agricultural labour to the production of farming equipment, for example) and the ultimate creation of more jobs throughout society.
Continuing into recent times, companies that make greater use of technology create the most jobs. The more intense the use of technology, the greater the job creation over time. And while many of the jobs created by new technology are frequently not accessible to the people who have been displaced, it is important to remember that job creation by companies that make greater use of technology is not limited to just scientific or technical jobs
Survival in the new global business market calls for improved productivity and increased competition. Indeed, firms that have upgraded their products, used technology skillfully and sought niche markets have not only survived, but prospered. However, the down side of increased productivity is the elimination of many jobs in manufacturing, transportation and other high-paying industries.
Just as globalization presents both challenges and opportunities, so too does technology. Ever since the beginning of the first industrial revolution in the 18th century, the introduction of new technologies has meant both the transfer of jobs from one sector to another (from agricultural labour to the production of farming equipment, for example) and the ultimate creation of more jobs throughout society.
Continuing into recent times, companies that make greater use of technology create the most jobs. The more intense the use of technology, the greater the job creation over time. And while many of the jobs created by new technology are frequently not accessible to the people who have been displaced, it is important to remember that job creation by companies that make greater use of technology is not limited to just scientific or technical jobs
Saturday, April 7, 2007
Globalization has obviously been displayed in the advances of technology in the 21st century
TJC has modernized as society took a turn towards computerization.
An elevator has been set up in TJ for the convenience of walking impaired students,
this goes to show the impact globalization has on our school and the welfare of its student.
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