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Resource discovery is an important aspect of many modern large-scale distributed systems. In the past, this problem has been solved using many different approaches, such as a central registry server, flooding-based protocols, and distributed hash tables. In this paper, these three widely used architectures are compared, using measurement results obtained from real implementations run on an Emulab...
Multicast conferencing is a rapidly-growing area of Internet use. Audio, video and other media such as shared whiteboard data can be distributed efficiently between groups of conference participants using multicast algorithms that minimize the amount of traffic sent over the network. This is far more effective than systems that maintain a separate link between each participant. On the other hand Peer-to-Peer...
Session Initiation Protocol (SIP) standardized by IETF provides a way to establish the sessions between Internet telephony devices, but this protocol canpsilat work with Network Address Translator (NAT). Therefore how to make SIP NAT friendly becomes a worthy topic. This paper proposes an efficient approach P2P-Grid architecture model based ICE which uses Simple Traversal of User Datagram Protocol...
PPStream is one of the most popular p2p media streaming applications. Our early study finds the design philosophy for both PPStream and PPLive is different. As a preliminary study for further deeply modeling, in this paper we try to study PPStream client behavior based on our recent measurement dataset. The report focuses on several aspects of peer: some specific mechanisms applied in the new version...
Although direct reciprocity (Tit-for-Tai) contribution systems have been successful in reducing freeloading in peer- to-peer overlays, it has been shown that, unless the contribution network is dense, they tend to be slow (or may even fail) to converge. On the other hand, current indirect reciprocity mechanisms based on reputation systems tend to be susceptible to sybil attacks, peer slander and whitewashing...
Instant messaging is a very popular service in wire and wireless networks. Also, numerous IM communities have been created ,and multiple operators in the world have developed platforms supporting IM services in different environments. Therefore, IM interworking between heterogeneous networks is considered to be a major step in order to enlarge IM communities ; however, no architecture specifies any...
Peer-to-Peer (P2P) networks are becoming very popular these days. The scattered environment in P2P networks makes it different from the traditional networks. Each member in P2P network can act as a client as well as a server, which is different from its traditional counterpart such as Internet, where a central server is required to control the network. Finding resources in P2P systems is a major issue...
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