Active Networks: an Evolution of the Internet
نویسندگان
چکیده
Le Active Networks si propongono quale evoluzione del classico modello di rete a commutrazione di pacchetto. Al tradizionale modello “passivo” di rete basato su una definizione statica del comportamento della infrastruttura di trasmissione dati si contrappone un modello “attivo” in cui i nodi intermedi della rete (switch e router) possono eseguire codice utente contenuto nelle unità elementari di dati trasmessi (pacchetti). Le Active Networks costituiscono un modello di rete “programmabile” nel quale l’infrastruttura di rete viene riconosciuta quale strumento di trasmissione e di calcolo allo stesso tempo e su cui si aprono nuovi scenari di indagine di estremo interesse. Questo articolo da una breve introduzione alle Active Networks, discute i vantaggi che esse introducono e presenta lo stato di avanzamento delle ricerche del settore. Active Networks can be seen as an evolution of the classical model of packet-switched networks. The traditional and ”passive” network model is based on a static definition of the network node behaviour. Active Networks propose an “active” model where the intermediate nodes (switches and routers) can load and execute user code contained in the data units (packets). Active Networks are a programmable network model, where bandwidth and computation are both considered shared network resources. This approach opens up new interesting research fields. This paper gives a short introduction of Active Networks, discusses the advantages they introduce and presents the research advances in this field.
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