RVP

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Delivery versus Payment

A settlement procedure in which the buyer and the seller of a security agree that the seller will pay the buyer upon the security's delivery to the seller. This agreement is designed to reduce risk to both parties: if the delivery and payment do not occur at the same time there is a risk, however small, of theft by one party or the other. It is more commonly known as cash on delivery.

RVP

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Para implementar la arquitectura del sistema se hace uso de dos plataformas: JADE, que sera la encargada del manejo de los agentes, del sistema multi-agente y de la comunicacion entre los agentes; y JXTA, que sera la plataforma encargada de las comunicaciones y del descubrimiento dinamico de nodos sobre la red P2P.
La plataforma JXTA, como se describio anteriormente, sera la encargada de crear, publicar y buscar los respectivos advertisements que representan el servicio, en este caso el servicio de eco, en la red JXTA.
Firewall and network address translator (NAT) traversal is a significant feature of JXTA; this frees peers located behind restrictive firewalls and NATs (the so-called "edges" of the Internet) to act as service providers rather than be forced into a passive consumer role, as is the case in the client/server-centric structure of the World Wide Web.
In addition to the regular "edge" peer role, JXTA networks also contain two types of "super-peers," which are simply peers that hold additional responsibilities.
To hide the complexities involved in establishing a communication path between peers, the developer of a JXTA application makes use of a pipe abstraction.
More information on the JXTA protocols and architecture is provided by JXTA (2003).
Martinez, "Desarrollo de Aplicaciones P2P para Dispositivos Moviles haciendo uso de los Protocolos JXTA (JXTA + J2ME) - El Punto de Encuentro Virtual P2P", presentado en las V Jornadas de Investigacion y Desarrollo en Informatica (JIDI) en el marco del evento TECNOCOM 2005, Medellin, Colombia, 2005.
Williams, "Secure peer-to-peer networking: the JXTA example".
So long as peer supports JXTA communication protocol, she can instantly ask and join any other peer groups under some topics, even if such peer has already got involved in other peer groups.
This section describes the query procedure in our prototype by adopting the JXTA protocol.
We can use XML, which is default format in JXTA, to pass advertisement from peer to peer, easily providing expandable and hierarchical representation of information which is compatible with any classification systems.
Industry report: JXTA: A network programming environment.