Cloud Computing provides facilities for storage, management, processing, and accessing information and other data stored in several system, platforms, applications etc . The above work represents the implementation of electronic hospital management system which enables date storage, update, retrieval, modification through cloud using the virtual private network which enhances the security of th...

Host configuration in optical networks is usually done by hand. In this paper we propose to use zero configuration techniques, including self-assigned IP addresses and multicast DNS to do this automatically. The proposed technology is designed for small networks without central control, and can be applied to optical private networks as long as there is no router in between the end-hosts. c © 20...

We investigate the problem of designing survivable broadband virtual private networks that employ the Open Shortest Path First (OSPF) routing protocol to route the packages. The capacities available for the links of the network are a minimal capacity plus multiples of a unit capacity. Given the directed communication demands between all pairs of nodes, we wish to select the capacities in a such...

This paper presents the results of the implementation of a Virtual Private Network telecommunications service prototype and associated management services on a distributed platform. The specification thereof has been carried out according to the RACE II project R2041 PRISM Service Management Reference Configuration. The implementation of the service prototype and its management has been achieve...

The goal of this work is to separately control individual secure sessions between unlimited pairs of multicast receivers and senders. At the same time, the solution given preserves the scalability of receiver initiated Internet multicast for the data transfer itself. Unlike other multicast key management solutions, there are absolutely no side effects on other receivers when a single receiver j...

This working paper is a surveys of current activities in the development of solutions for virtual private networks over the Internet. The paper is related to the CATI project (WP2T1 and WP2T2) which is founded by the Swiss National Foundation.

Status of This Memo This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited. Abstract This document provides an Applicability Statement for the Virtual Private Network (VPN) solution described in RFC 4364 and other documents listed in the References section.

In Part I we introduced a working definition of the term "Virtual Private Network" (VPN), and discussed the motivations behind the adoption of such networks. We outlined a framework for describing the various forms of VPNs, and then examined numerous network-layer VPN structures, in particular, that of controlled route leakage and tunnelling techniques. We begin Part II with examining other net...

The simulation of a technical system is an invaluable step in its design process. Cellular Automata (CA) present an accepted and widely used model for the simulation of a broad range of systems. They are a good fit for execution on cluster computers, due to the fact that CA simulations are quite compute-intensive and well parallelizable. At our university, we have several small-scale clusters o...

We give the first constant factor approximation algorithm for the asymmetric Virtual Private Network (Vpn) problem with arbitrary concave costs. We even show the stronger result, that there is always a tree solution of cost at most 2·OPT and that a tree solution of (expected) cost at most 49.84 ·OPT can be determined in polynomial time. For the case of linear cost we obtain a (2+ε S )-approxima...