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 virtual private network problem (Vpn) models scenarios where traffic is uncertain or rapidly changing. The goal is supporting at minimum cost a given family of traffic matrices, which are implicitly given by upper bounds on the ingoing and outgoing traffic at each node. Costs are classically defined by a linear function (linear Vpn), but we consider here also the more general case of concav...

This paper is a survey on Virtual Private Networks (VPNs). The functionality of a VPN is precisely the same as any other private network. This means that information passed between parties on the network is protected from attackers. The difference between a VPN and another private network is that the former operates over a public network, such as the Internet. The VPN occupies its own private a...

Contemporary, global cyber terrorism via the internet have changed the landscape of security implementations in cooperate organizations. This paper discusses analyses and develops novel security architecture for secure transactions in Virtual Private Network (VPN) environments. Open standard VPN has been in use for a long time without addressing the security holes in VPN wired and wireless netw...

BACKGROUND AND PURPOSE After focal cerebral ischemia, depending on its localization and extent, secondary neuronal damage may occur that is remote from the initial lesion. In this study differences in secondary damage of the ventroposterior thalamic nucleus (VPN) and the reticular thalamic nucleus (RTN) were investigated with the use of different ischemia models. METHODS Transient middle cere...

A network which merges the usage of the public and the private networks and uses security software for the purpose of compressing, encrypting and masking the digital packets that are being transmitted in the network is called as Virtual Private Network (VPN). In VPN, the communication between the user ends is maintained such that it appears as if the source end is directly linked to the destina...

In the Drosophila olfactory system, odorant information is sensed by olfactory sensory neurons and relayed from the primary olfactory center, the antennal lobe (AL), to higher olfactory centers via olfactory projection neurons (PNs). A major portion of the AL is constituted with dendrites of four groups of PNs, anterodorsal PNs (adPNs), lateral PNs (lPNs), lateroventral PNs (lvPNs) and ventral ...

Hanan Selman Hessan and Ahmed Mohammed Abbas 563 Abstract Immune status was examined after tonsillectomy operations in 30 children with recurrent acute tonsillitis, their ages ranged between 3-10 years, were clinically diagnosed by ENT surgeon at AlHilla General Teaching Hospital and 10 apparently healthy children were included as a control in the study which lasted from February to May 2011 .I...

In recent years, IP-based virtual private networks (IP-VPNs), which provide a virtual privately owned network over an IP network, have attracted attention. With existing IP-VPNs, however, there is a serious problem that fairness among IPVPN customers is not satisfied. In our previous work, we have proposed an IP-VPN fairness control mechanism called I2VFC (Interand Intra-VPN Fairness Control) t...

هديکچ ت یحارط یارب ديدج شور کي هلاقم نيا رد تيوق ارا یطخ زاف اب هدرتسگ هدننک ئ يم ه دوش . شور نيا تيوقت و لاسروسنارت لاتيجيد رتليف یژولوپوت نيب تهابش یانبم رب يم هدرتسگ هدننک دشاب . نيا یانبم رب رواجم هقبط ود نيب ريخات رادقم و هدننک تيوقت زا هقبط ره نيگ یژولوپوت رتليف هيروف طسب زا هدافتسا اب Raise Cosine يم نييعت یروط یسناکرف هلصاف رد هک دوش 0-40 GHz تيوقت یطخ زاف هصخشم یاراد هدننک دشاب ه...