content discovery is one of the fundamental issues that determines the architecture and performance of content distribution networks based on peer-to-peer (p2p) networks. to administrate the costs and discoveries, peers of a p2p network communicate with each other by one or more overlay layers. the condition of node’s relations in overlay networks, have a great impact in efficiency of networks....

recently, peer-to-peer (p2p) networks contribute to a large fraction of the internet backbone traffic. consequently, misusing such networks for malicious purposes is a potential side effect. in this review article, we investigate different techniques of misusing p2p overlay networks to launch large-scale next-generation distributed denial of service (ddos) attacks. in particular, we investigate...

To provide application-oriented network services, a variety of overlay networks are deployed over physical IP networks. Since they share and compete for the same physical network resources, their selfish behaviors affect each other and, as a result, their performance deteriorates. Our research group considers a model of overlay network symbiosis, where overlay networks coexist and cooperate to ...

In peer-to-peer (P2P) overlay networks, the mechanism of a peer randomly joining and leaving a network, causes a topology mismatch between the overlay and the underlying physical topology. This causes a large volume of redundant traffic in the underlying physical network as well as an extra delay in message delivery in the overlay network. Topology mismatch occurs because overlay networks are n...

In the past few years, resource discovery is an important mechanism in P2P applications. P2P networks could be categorized into structured and unstructured. In general, structured P2P networks (DHTs) provide efficient keyword search, but is difficult to offer a variety of search modes. Unstructured P2P networks are applied to highly churn P2P networks, but they are inefficient. In this paper, w...

Peer-to-Peer (P2P) systems are self-organized and decentralized. However, the mechanism of a peer randomly joining and leaving a P2P network causes topology mismatching between the P2P logical overlay network and the physical underlying network. The topology mismatching problem brings great stress on the Internet infrastructure and seriously limits the performance gain from various search or ro...

A significant part of the Internet traffic is generated by peer-to-peer (P2P) applications. P2P used traditionally for file-sharing, and more recently for real-time communications and live media streaming. With little knowledge of the underlying network topology such applications discover a route to each other through an overlay network. P2P could be a promising start for enabling large-scale s...

Peer-to-peer (p2p) network is an alternative of client/server system for sharing resources, e.g. files. P2P network is a robust, distributed and fault tolerant architecture. We consider the scenario of p2p network over MANET where all nodes are the members of p2p network and one of the node acts as p2p server which maintains the file list available to the nodes. The mobility of nodes constantly...

In structured and unstructured Peer-to-Peer (P2P) systems, frequent joining and leaving of peer nodes causes topology mismatch between the P2P logical overlay network and the physical underlay network. This topology mismatch problem generates high volumes of redundant traffic in the network. This paper presents Common Junction Methodology (CJM) to reduce network overhead by optimize the overlay...