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BitTorrent

BitTorrent
Programmer Bram Cohen, a former University at Buffalo graduate student in Computer Science,[4] designed the protocol in April 2001 and released the first available version on July 2, 2001,[5] and the final version in 2008.[6] BitTorrent clients are available for a variety of computing platforms and operating systems including an official client released by Bittorrent, Inc. As of 2009, BitTorrent reportedly had about the same number of active users online as viewers of YouTube and Facebook combined.[7][8] As of January 2012[update], BitTorrent is utilized by 150 million active users (according to BitTorrent, Inc.). Based on this figure, the total number of monthly BitTorrent users can be estimated at more than a quarter of a billion.[9] Description[edit] The middle computer is acting as a seed to provide a file to the other computers which act as peers. The file being distributed is divided into segments called pieces. When a peer completely downloads a file, it becomes an additional seed.

BitTorrent Based DNS To Counter US Domain Seizures The domain seizures by the United States authorities in recent days and upcoming legislation that could make similar takeovers even easier in the future, have inspired a group of enthusiasts to come up with a new, decentralized and BitTorrent-powered DNS system. This system will exchange DNS information through peer-to-peer transfers and will work with a new .p2p domain extension. In a direct response to the domain seizures by US authorities during the last few days, a group of established enthusiasts have started working on a DNS system that can’t be touched by any governmental institution. Ironically, considering the seizure of the Torrent-Finder meta-search engine domain, the new DNS system will be partly powered by BitTorrent. In recent months, global anti-piracy efforts have increasingly focused on seizing domains of allegedly infringing sites. The Dot-P2P project was literally started a few days ago, but already the developers are making great progress.

eDonkey network The eDonkey Network (also known as the eDonkey2000 network or eD2k) is a decentralized, mostly server-based, peer-to-peer file sharing network best suited to share big files among users, and to provide long term availability of files. Like most sharing networks, it is decentralized, as there is not any central hub for the network; also, files are not stored on a central server but are exchanged directly between users based on the peer-to-peer principle. Currently, the eD2k network is not supported by any organization (in the past it was supported by the MetaMachine Corporation, its creator, which now is out of business) and development and maintenance is being fully provided by its community and client developers. There are many programs that act as the client part of the network. The original eD2k protocol has been extended by subsequent releases of both eserver and eMule programs, generally working together to decide what new features the eD2k protocol should support. Features[edit]

Chmura obliczeniowa Diagram przedstawiający „chmurę” Zasada działania chmury obliczeniowej[edytuj | edytuj kod] Zasada działania polega na przeniesieniu całego ciężaru świadczenia usług IT (danych, oprogramowania lub mocy obliczeniowej) na serwer i umożliwienie stałego dostępu poprzez komputery klienckie. Dzięki temu ich bezpieczeństwo nie zależy od tego, co stanie się z komputerem klienckim, a szybkość procesów wynika z mocy obliczeniowej serwera. Wystarczy zalogować się z jakiegokolwiek komputera z dostępem do Internetu by zacząć korzystać z dobrodziejstw chmury obliczeniowej. Pojęcie chmury nie jest jednoznaczne, w szerokim znaczeniu przetwarzanym w chmurze jest wszystko przetwarzane na zewnątrz zapory sieciowej, włączając w to konwencjonalny outsourcing[2]. Rodzaje chmur[edytuj | edytuj kod] Rozróżniamy chmury: Modele chmury obliczeniowej[edytuj | edytuj kod] Współcześnie coraz więcej nowych funkcjonalności umieszczanych jest w modelu chmur obliczeniowych. Kolokacja[edytuj | edytuj kod] Osobny artykuł: IPaaS.

Truly Decentralized BitTorrent Downloading Has Finally Arrived BitTorrent is branded as a peer-to-peer technology, but despite this label the downloading process still relies heavily on central servers. In the first place there are the BitTorrent search engines and indexes such as The Pirate Bay and isoHunt. These are needed to search for content and to grab the .torrent file one needs to download a file. Besides these torrent sites, most BitTorrent downloads are still managed by so-called trackers. Finally central servers are used by moderators to help hunt spam and malware. In the last years these ‘central server’ vulnerabilities have caused a number of minor inconveniences for torrent users. To address these issues, ideally BitTorrent downloads should no longer require a central server. The latest version of the Tribler BitTorrent client (Win, Mac and Linux), released only a few minutes ago, is capable of all the above and many more things that could be described as quite revolutionary. Triber: search, download and play (large). Tribler Channels

File Transfer Protocol FTP is built on a client-server architecture and uses separate control and data connections between the client and the server.[1] FTP users may authenticate themselves using a clear-text sign-in protocol, normally in the form of a username and password, but can connect anonymously if the server is configured to allow it. For secure transmission that hides (encrypts) the username and password, and encrypts the content, FTP is often secured with SSL/TLS ("FTPS"). SSH File Transfer Protocol ("SFTP") is sometimes also used instead, but is technologically different. History[edit] The original specification for the File Transfer Protocol was written by Abhay Bhushan and published as RFC 114 on 16 April 1971. Protocol overview[edit] Communication and data transfer[edit] Illustration of starting a passive connection using port 21 The server responds over the control connection with three-digit status codes in ASCII with an optional text message. ASCII mode: used for text. Login[edit] Syntax[edit] or:

Computación en la nube Computación en la nube, o «la nube» La computación en la nube (del inglés cloud computing),[1]​ conocida también como servicios en la nube, informática en la nube, nube de cómputo o simplemente «la nube», es un paradigma que permite ofrecer servicios de computación a través de una red, que usualmente es internet. Introducción[editar] La computación en la nube es la disponibilidad a pedido de los recursos del sistema informático, especialmente el almacenamiento de datos y la capacidad de cómputo, sin una gestión activa directa por parte del usuario. A menudo, el término «computación en la nube» se lo relaciona con una reducción de costos, disminución de vulnerabilidades y garantía de disponibilidad. La computación en la nube es un nuevo modelo de prestación de servicios tecnológicos que impacta sin lugar a dudas en diversos negocios. Comienzos[editar] Fundamentos[editar] Desde los años sesenta, la computación en nube se ha desarrollado a lo largo de una serie de líneas. Tipos de PaaS[editar]

OneSwarm: The Privacy Aware BitTorrent Client Developed at the University of Washington, OneSwarm is a BitTorrent client that allows users to share files "anonymously" or with a specific group of friends. These features give users more control over their privacy, while maintaining a decent download speed. The client operates from within an Internet browser and is available for Mac, Windows and Linux. Those who’ve been reading TorrentFreak for long enough may remember how the MPAA and RIAA accused a printer at the University of Washington of copyright infringement a few years ago. With their research, the researchers pointed out that gathering evidence on BitTorrent downloaders is full of pitfalls. Perhaps not coincidentally the same research group is also behind the “privacy preserving” BitTorrent client OneSwarm, currently developed by Tomas Isdal and Michael Piatek, two PhD students at the University of Washington. Unlike other regular BitTorrent clients, OneSwarm allows users to share files only with a selected group of friends.

Gnutella2 History[edit] In November 2002, Michael Stokes announced the Gnutella2 protocol to the Gnutella Developers Forum. While some thought the goals stated for Gnutella2, primarily to make a clean break with the gnutella 0.6 protocol and start over so that some of gnutella's less clean parts would be done more elegantly, to be impressive and desirable, other developers, primarily those of LimeWire and BearShare, thought it a "cheap publicity stunt" and discounted technical merits. Many still refuse to refer to the network as "Gnutella2" and instead refer to it as "Mike's Protocol" ("MP").[2] With the developers entrenched in their positions, a flame war soon erupted, further cementing both sides' resolve.[3][4][5][6] The draft specifications were released on March 26, 2003, and more detailed specifications soon followed. Design[edit] Gnutella2 relies extensively on UDP, rather than TCP, for searches. Protocol features[edit] Differences from gnutella[edit] Protocol[edit] Search algorithm[edit]

Modelos de Despliegue de CloudComputing (taxonomía del NIST) » Realcloud Project En el comentario del 20-feb-2011 veíamos la definición que el NIST realiza para el concepto de CloudComputing, y al día siguiente (el 21-feb-2011) analizábamos los 3 “Modelos (o niveles) de Servicio” (SaaS, Paas, e IaaS) tal como los define el NIST (pues ambas, definición y clasificación, son la más aceptadas en la actualidad). También el NIST distingue entre 4 “Modelos de Despliegue” (Privado, Comunitario, Público e Híbrido) que introduce una ligera diferencia (el modelo comunitario) sobre el resto de la bibliografía actual al respecto (y que, en mi opinión, es importante considerar en un país como España, donde el cooperativismo tiene buenas raíces): Nube Pública: La infraestructura de la nube está disponible al público en general (o un subconjunto en función de los criterios de venta del Proveedor). La infraestructura pertenece a la organización que vende sus servicios de Cloud Computing.

Researchers Improve BitTorrent Download Speeds Researchers from the Tribler project at Delft University of Technology are proposing a new set of rules that should significantly improve the download speeds of many BitTorrent users. The new "Superior Seeding Standard" implemented in the latest release of the Tribler BitTorrent client is inspired by the ratio-enforcement policies at private tracker communities, but doesn't discriminate against people with low bandwidth connections. Some scientists devote their lives to finding a cure for terminal illnesses, others hope to discover new planets in galaxies far away, but there’s also a group of scientists mostly concerned with improving BitTorrent. The Tribler team at Delft University of Technology are such a group, and they have found a way to improve download speeds for BitTorrent users who are committed to sharing. Tribler’s BitTorrent client has been in development for more than 5 years and continues to deliver experimental improvements and innovative ideas. The Paper

Hypertext Transfer Protocol The Hypertext Transfer Protocol (HTTP) is an application protocol for distributed, collaborative, hypermedia information systems.[1] HTTP is the foundation of data communication for the World Wide Web. The standards development of HTTP was coordinated by the Internet Engineering Task Force (IETF) and the World Wide Web Consortium (W3C), culminating in the publication of a series of Requests for Comments (RFCs), most notably RFC 2616 (June 1999), which defined HTTP/1.1, the version of HTTP most commonly used today. In June 2014, RFC 2616 was retired and HTTP/1.1 was redefined by RFCs 7230, 7231, 7232, 7233, 7234, and 7235.[2] HTTP/2 is currently in draft form. Technical overview[edit] URL beginning with the HTTP scheme and the WWW domain name label. A web browser is an example of a user agent (UA). HTTP is designed to permit intermediate network elements to improve or enable communications between clients and servers. History[edit] The first documented version of HTTP was HTTP V0.9 (1991).

BitTorrent Pirates Go Nuts After TV Release Groups Dump Xvid Some Internet piracy groups decided to implement some new regulations and standards last week. Instead of releasing TV shows in the Xvid/avi format, groups responsible for putting major TV shows online switched to MP4/x264. Outraged by the lack of democracy, some BitTorrent users are directing their anger at bewildered torrent sites and even threatening to boycott releases. Every now and again, the world’s most famous piracy release groups get together and have a big old meeting to decide how they’ll carry out their future activities. Ok, so the last sentence isn’t true, but nevertheless that appears to be the current assessment of events according to some BitTorrent users. The problem stems back to a new document which details a set of standards TV show release groups such as LOL and MOMENTUM will have to live up to in order to comply with so-called ‘Scene rules’. “x264 has become the most advanced video codec over the past few years. “LOL, why are all your new uploads MP4 format?

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