Abstract
A virtual private network (VPN) can be defined as a way to provide secure communication between members of a group through use of the public telecommunication infrastructure, maintaining privacy through the use of a tunneling protocol and security procedures. This work examines and empirically evaluates the remote access VPNs, namely point to point tunneling protocol (PPTP), layer 2 tunneling protocol over Internet protocol security (L2TP/IPSec), and secure socket layer (SSL). We explore the impact of these VPNs on end-to-end user application performance using metrics such as throughput, RTT, jitter, and packet loss. All experiments were conducted using wired and wireless windows XP SP/2 host (VPN client) connected to a windows server 2003 host (VPN server).
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