Tuesday, July 28, 2009

1.1 Peer-to-Peer Network Definition

Throughout this thesis we will study peer-to-peer networks, henceforth we will
use the acronym P2P. A P2P network is a network that relies on computing
power of it’s clients rather than in the network itself [1]. This means the clients
(peers) will do the necessary operations to keep the network going rather than
a central server. Of course, there are different levels of peer-to-peer networking:
• Hybrid P2P: There is a central server which keeps information about
the network. The peers are responsible for storing the information. If they
want to contact another peer, they query the server for the address.
• Pure P2P: There is absolutely no central server or router. Each peer
acts as client and server at the same time. This is also sometimes referred
to as “serverless” P2P.
• Mixed P2P: Between “hybrid” and “pure” P2P networks. An example
of such a network is Gnutella which has no central server but clusters its
nodes around so-called “supernodes”.

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