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revision 1.132 by hemppah, Wed Mar 12 13:41:17 2003 UTC revision 1.133 by hemppah, Wed Mar 12 14:33:52 2003 UTC
# Line 78  vertaisverkosta Fenfire:n kannalta olenn Line 78  vertaisverkosta Fenfire:n kannalta olenn
78    
79  \chapter{Introduction}  \chapter{Introduction}
80    
81  Peer-to-Peer systems have recently received noteworthy attention in both  Peer-to-Peer systems have recently received considerable attention in both
82  academia and industry for a number of reasons. First, the lack of centralization  academia and industry for a number of reasons. First, the lack of centralization
83  means that participants can form a distributed system without any investment to  means that the participants can form a distributed system without any investment to
84  centralized, high-priced hardware which would coordinate it. Second, Peer-to-Peer  centralized, high-priced hardware which would coordinate it. Second, Peer-to-Peer
85  provides new direct way to achieve interoperability between network participants.  provides new direct way to achieve interoperability between network participants.
86  Finally, the distributed and ad-hoc nature of Peer-to-Peer improves scalability  Finally, the distributed and ad-hoc nature of Peer-to-Peer improves scalability
# Line 95  properties of Peer-to-Peer network, whil Line 95  properties of Peer-to-Peer network, whil
95  systems. Schollmeier \cite{schollmeier01p2pdefinition} characterizes a Peer-to-Peer network as a system of  systems. Schollmeier \cite{schollmeier01p2pdefinition} characterizes a Peer-to-Peer network as a system of
96  distributed entities that share their own resources (e.g. CPU time or storage space).  distributed entities that share their own resources (e.g. CPU time or storage space).
97  To summarize, Peer-to-Peer systems can be characterized as distributed  To summarize, Peer-to-Peer systems can be characterized as distributed
98  systems in which all communication is symmetric and all participants have identical  systems in which all communication is symmetric and all participants entities have identical
99  capabilities and responsibilities. Each \emph{peer} may contribute data or  capabilities and responsibilities. Each entity, i.e., \emph{peer}, may contribute data or
100  computing resources (e.g., unused storage) to the overall system and the welfare  computing resources (e.g., unused storage) to the overall system and the welfare
101  of the community can scale with the number of participants. Thus, each participant  of the community can scale with the number of participants. Thus, each participant
102  rely on one another's services and resources, rather than solely relying on dedicated  rely on one another's services and resources, rather than solely relying on dedicated

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