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{{Unreferenced section|date=June 2019}}
In distinct usage in [[distributed computing]], the ''network architecture'' often describes the structure and classification of a distributed application architecture, as the participating nodes in a distributed application are often referred to as a ''network''. <ref>{{Cite book|last=author.|first=Hwang, Kai,|url=http://worldcat.org/oclc/1105790603|title=Distributed and Cloud Computing|oclc=1105790603}}</ref>For example, the [[applications architecture]] of the [[public switched telephone network]] (PSTN) has been termed the [[Intelligent Network]]. There are a number of specific classifications but all lie on a continuum between the [[dumb network]] (e.g. the [[Internet]]) and the intelligent network (e.g. the [[public switched telephone network]]).
A popular example of such usage of the term in distributed applications, as well as PVCs (permanent virtual circuits), is the organization of nodes in [[P2P network|peer-to-peer (P2P) services and networks]]. P2P networks usually implement [[overlay network]]s running over an underlying physical or logical network. These overlay networks may implement certain organizational structures of the nodes according to several distinct models, the network architecture of the system.
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