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Our technical considerations and experimental results strongly emphasized the better scalability and reliability of the MPLS/BGP model that seems to be the most promising approach for the provisioning of VPN services on the future Giga-speed optical backbones.
The results exhibits that, GRE is preferable for delay and bandwidth sensitive application in context of site to site VPN and L2TP is more effective than PPTP for remote access VPN.
Additionally, the VPN supports data compression, which increases Internet performance between sites.
We hope that our research will offer a clear understanding of the users and will help them make their decision on choosing the correct VPN based on their need and priority regarding security, speed, and cost.
Proceedings ArticleDOI
Zied Ben Houidi, Mickael Meulle 
05 Oct 2010
18 Citations
In this paper, we show that VPN routing scheme's poor scalability stems from the application to VPNs of a protocol originally designed for full routing, specifically the Internet.
A recently proposed VPN bandwidth specification model, called hose model, provides customers with the flexibility to specify the bandwidth requirement of a VPN.
A “virtual private network (VPN) over Internet” has the benefit of being cost-effective and flexible.
We then proposed a novel VPN bandwidth specification mode, called Slotted-Hose (S-Hose) model, as well as a novel traffic engineering algorithm for the provisioning VPNs.
Proceedings ArticleDOI
C.J.C. Pena, Joseph B. Evans 
08 Nov 2000
24 Citations
The results over a low speed serial link show that the CPU usage is not significantly affected by the VPN.
Journal ArticleDOI
Dong Wei, Nirwan Ansari 
27 Dec 2004
6 Citations
The authors propose a fluid hose-modelled VPN, and based on this model they develop an idealised fluid fair bandwidth allocation scheme to improve the performance of the VPN.