Brief Introduction of Peer-to-Peer Technologies
What Is Peer-to-Peer?
The term “peer-to-peer” has various meanings under different circumstances, when mentioned in the context of digital and network settings, especially nowadays with the popularity of Internet usage, this term is often used to describe a type of decentralized and distributed network architecture, in which individual nodes in the network act as both suppliers and consumers of data resources; these nodes, i.e. the “peers”, are actually end-user devices, such as personal computers, PDAs, iPads, and mobile devices with accessibility to Internet,
Initially, when different kinds of end-user devices become common in people’s daily life, they are often connected together through the local area networks to certain central servers to get access to files, videos, audios, and other information. These central servers are typically more powerful than the personal computers, so any large data processing can take place on these central servers, allowing the end-users to download files onto their personal computers.
In contrast to th...
In 500 B.C. the abacus was first used by the Babylonians as an aid to simple arithmetic. In 1623 Wihelm Schickard (1592 - 1635) invented a "Calculating Clock". This mechanical machine could add and subtract up to 6 digit numbers, and warned of an overflow by ringing a bell. J. H. Mueller comes up with the idea of the "difference engine", in 1786. This calculator could tabulate values of a polynomial. Muellers attempt to raise funds fails and the project was forgotten. Scheutz and his son Edward produced a 3rd order difference engine with a printer in 1843 and their government agreed to fund their next project.
What we know today as the Internet began as a Defense Advanced Research Projects Agency (DARPA) project in 1969, which was designed to connect several research databases across the country. However, until the end of 1991, the advances were almost completely technical, as the goals set by those responsible in its growth were beyond what the hardware was capable of providing. In 1988, the Internet began to receive attention in the popular press, when the first documented computer virus was released at Cornell University. 1991 marked the beginning of the transition of the Internet as we know it today, with the National Science Foundation’s reinterpretation of its Acceptable Use Policy to allow for commercial traffic across its network, the development of the first graphic interfaces, the formation of the Internet Society, and the formation of ECHO (East Coast Hang Out), one of the first publicly available online communities.
Originally, Napster was a kind of file sharing software. File sharing software had been developed as database managing software. As the internet has grown so huge all over the world, a distributed database system model has been proposed as the preferring system. The file sharing P2P software has become the celebrated information tool for storage system. But now, rapid growth of broadband and the ability to be anonymous on the internet threaten the entertainment industry’s control of the distribution of such products as movie and music. We can get music or movie files with P2P software through the internet for free.
This peer-to-peer file sharing, or P2P, was an automated way to copy copyrighted material (Tyson). The creation and increased usage of Napster resulted in a crisis for the industry because neither the record labels nor the artists were getting any money in return. Although Napster lost in lawsuits against them for breaking copyright laws, labels weren’t able to stop this type of piracy and sure enough, new similar software platforms were created. Some P2P file sharing sites that are popular now include BitTorrent, uTorrent, and The Pirate Bay. P2P sharing changed the way the music could be shared and the traditional business model was no longer dominant in the music industry because of
It all began in 1991, during the time of monumental computing development. DOS had been bought from a Seattle hacker by Bill Gates, for a sum of $50,000 – a small price for an operating system that had managed sneak its way across the globe due to a clever marketing strategy. Apple’s OS and UNIX were both available, though the cost of running either was far greater than that of running DOS. Enter MINIX, an operating system developed from the ground up by Andrew S. Tanenbaum, a college professor. MINIX was part of a lesson plan used to teach students the inner-workings of an operating system. Tanenbaum had written a book on MINIX called “Operating System” and anyone who had picked up a copy would find the 12,000 lines of code that comprised MINIX itself. This was a big issue; due to the fact that all know (well published) operating systems to that point had been well guarded by software developers, thus making it difficult for people to truly expand on operating system mechanics.
Local Area Networks also called LANs have been a major player in industrialization of computers. In the past 20 or so years the worlds industry has be invaded with new computer technology. It has made such an impact on the way we do business that it has become essential with an ever-growing need for improvement. LANs give an employer the ability to share information between computers with a simple relatively inexpensive system of network cards and software. It also lets the user or users share hardware such as Printers and scanners. The speed of access between the computers is lighting fast because the data has a short distance to cover. In most cases a LAN only occupies one or a group of buildings located next to each other. For larger area need there are several other types of networks such as the Internet.
The first online peer to peer file-sharing application was Napster. Napster allowed people to copy music from their CDs onto their computers in mp3 format. They then allowed other members of Napster to download these songs onto their computers. Once this caught on, millions of people were downloading thousands of songs a day. And as you can imagine, this did not make the record companies happy with the idea that people were getting their music for free instead of buying the CD. It also caused a problem with some of the recording artists. Most notably Metallica.
It simplifies the storage and processing of large amounts of data, eases the deployment and operation of large-scale global products and services, and automates much of the administration of large-scale clusters of computers.
Thousands of years ago calculations were done using people’s fingers and pebbles that were found just lying around. Technology has transformed so much that today the most complicated computations are done within seconds. Human dependency on computers is increasing everyday. Just think how hard it would be to live a week without a computer. We owe the advancements of computers and other such electronic devices to the intelligence of men of the past.
Peer-to-peer (P2P) is a substitute network design to the conventional client-server architecture. P2P networks utilize a decentralised model in which each system, act as a peer, and serve as a client with its own layer of server functionality. A companion plays the role of a client and a server in the meantime. That is, the node can send calls to other nodes, and at the same time respond to approaching calls from other companions in the system. It is different from the traditional client-server model where a client can just send requests to a server and then wait for the server’s response.
The Internet has revolutionized the computer and communications world like nothing before. The Internet enables communication and transmission of data between computers at different locations. The Internet is a computer application that connects tens of thousands of interconnected computer networks that include 1.7 million host computers around the world. The basis of connecting all these computers together is by the use of ordinary telephone wires. Users are then directly joined to other computer users at there own will for a small connection fee per month. The connection conveniently includes unlimited access to over a million web sites twenty-four hours a day, seven days a week. There are many reasons why the Internet is important these reasons include: The net adapts to damage and error, data travels at 2/3 the speed of light on copper and fiber, the internet provides the same functionality to everyone, the net is the fastest growing technology ever, the net promotes freedom of speech, the net is digital, and can correct errors. Connecting to the Internet cost the taxpayer little or nothing, since each node was independent, and had to handle its own financing and its own technical requirements.
With the popularity of the Internet, sales for CDs, DVDs, Movies, and many other products have increased. Along with the increase of sales has brought forth an ever increasing problem of illegal media being downloaded. Programs such as Bittorent, Kazaa, and other direct-connect networking programs have allowed the transferring of such illegal media. Downloading song files from the Internet over a free peer to peer network is the moral equivalent of shoplifting music CDs from the local mall.
Napster is a company that developed the so-called peer-to-peer technology that lets people search and retrieve music files directly from one another's personal computers. When Napster first came out, millions of internet users worldwide were illegally downloading and distributing copyrighted music, videos, images, and software for free. After being vilified by the entertainment industry, which claims that Napster and any similar programs could make piracy of almost any digital work unstoppable, and many court battles, Napster was ordered by court to be shutdown in 2000. The technology has been praised as a revolutionary development for the Internet—unaware of the problems that would arise from such practices. However, the termination of Napster was not enough, months later, dozens of new, like programs were being developed and used. And since Napster, not much has been done to stop these latest downloading programs.
The TCP/IP is the most important internet operation protocol in the world. While IP protocol performs the mass of the functions which is needed for the internet to work. It does not have many capabilities which are essential and needed by applications. In TCP/IP model these tasks are performed by a pair of protocols that operate at the transport layer. The Transmission Control Protocol (TCP) and the User Datagram Protocol (UDP). These two protocols are vital when it comes to delivering and managing the communication of numerous applications. To pass on data streams to the proper applications the Transport layer must identify the target application. First, to be able to attain this, Transport layer assigns an application an identifier. In the TCP/IP model call this identifier a port number. Every individual software process needing to access the network is assigned a un...
In this day and age, networks are everywhere. The internet has also revolutionized around world. We tend to take for grantedthat computers should be connected together. When it comes to networking, it's hard to believe that the field is still a relatively young one, especially when it comes to hooking up small computers like PCs. In approaching any discussion of networking, it is very useful to take a step back and look at networking from a high level. What is it, exactly, and why is it now considered? So, it important that it is assumed that most PCs and other devices should be networked. Computer network is the best way to take advantage of more than one computer resources by sharing these resources , such as storage space ,