Internet Communications Using SIP : Delivering VoIP and Multimedia Services With Session Initiation Protocol {2Nd Ed.}

Figure 20.1 Example of an overlay network

Peer-to-Peer Networks

P2P networksshare the computing resources available in the network and also
the bandwidth of the peer nodes. P2P networks have a number of common
characteristics, such as significant autonomy from central servers [2] and inter-
mittent connectivity of most peer nodes at the edge. Peer nodes frequently join
and depart from the network.

Application

Transport

Network

Data link

Physical

Application

Transport

Network

Data link

Physical

Application

Transport

Network

Data link

Physical

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