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One of the key challenging aspects of peer-to-peer systems has been efficient search for objects. To achieve this, we need to minimize the number of nodes that have to be searched, thereby use minimum number of messages during the search process. This can be done by selectively sending requests to nodes having higher probability of a hit for the queried object. In this paper we present an algorithm...
Peer-to-peer (P2P) networks are vulnerable to Distributed Denial-of-Service (DDoS) attacks, which cause invalid packets to be flooded through the P2P network, preventing valid packets from being delivered. This causes a disruption of the services provided by the P2P network. Since, anonymity and lack of centralized control/censorship are the salient features of P2P networks; it often encourages malicious...
Wireless ad hoc networks consist of nodes which can communicate with each other in a peer-to-peer fashion over single hop or multi hops without any fixed infrastructure such as access point or base station. In flat topology there is no topology management concept and all the nodes participate in routing. In this paper the task of topology management for ad hoc networks is implemented using routing...
Live multimedia streaming applications operate more efficiently when organized in a peer to peer (P2P) topology. The upload capacity of the peers is utilized to support other peers thereby alleviating the load from the streaming server. Many peer to peer models have been proposed for live multimedia streaming but they have drawbacks including low resource utilization and high startup and source to...
The Gnutella protocol requires peers to broadcast messages to their neighbors when they search files. The message passing generates a lot of traffic in the network, which degrades the quality of service. We propose the new method to optimize the speed of search and to improve the quality of service in a Gnutella based peer-to-peer environment with using semantic routing and priority of nodes. Once...
During the last few years the application scope of peer-to-peer systems has been notably extended. While the problems of scalable data localization have been exhaustively addressed, one may notice that the problem of multicast cost and latency delays in very large, global scale peer-to-peer networks still remains inadequately considered. Many large scale applications will suffer from this multicast...
We introduce a new P2P exploration strategy based on an extension of space filling curve principles. This strategy is exhaustive and do not generates redundant messages. Initiated at the source node of a search query, a walker is sent to explore the neighborhood of this node. This walker is carrying an increasing list of visited nodes as an Ariadne-sequence, building at the same time an uncrossable...
People are using P2P (peer to peer) network for sharing and transferring digital content containing video, audio, or any other data file over the Internet from different part of the globe. All general P2P file sharing protocols were designed to work optimally in the case that all the peers have an end node on the Internet i.e. they are connectible. But due to the huge number of computers behind NAT...
CDN (Content Delivery Network) and P2P (Peer-to-Peer) are two dominant technologies in large-scale content distribution. However, they have their own advantages and disadvantages. In this paper, an efficient hierarchical content distribution scheme is proposed, integrating the traditional CDN and centralized P2P. In our approach, content distribution is divided into two stages. In the CDN-level core...
A content delivery network (CDN) is expected to provide high performance content delivery, which requires scalable infrastructure to achieve global coverage. The provision of such infrastructure may form a substantial entry barrier for new CDN providers, as well as affecting commercial viability of the existing ones. Peering of CDNs can be a way to allow dynamic infrastructural cooperation between...
Peer-to-peer backup systems provide mechanisms that allow participants to store their data cooperatively. When the proportion of unstable peers grows, these systems need to increase redundancy to maintain data availability. This redundancy could be reduced by storing data to more stable peers. In consequence, network traffic would be reduced and the global network??s storage capacity would be increased...
JXTA is an interoperable and platform independent peer-to-peer computing infrastructure. It is designed in a manner to address the needs of the widest possible set of P2P applications. In this paper, we propose SOS: a Service Oriented Architecture based on JXTA with semantic support. This contribution in regards to the existing platforms can be identified at three main levels: The architectural, resource...
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