The Status and Development Trends of Virtual Private Network Technology
Virtual Private Network (VPN) refers to rely on the ISP (Internet service providers) and other NSP (Network service provider), in the public network, to establish a dedicated data communication network technologies. In the virtual private network, between any two nodes connected no dedicated network for the traditional end-to-end physical link, but to use a public network composed of dynamic resources. VPN technology can reduce the internal network building costs, improve user network operation and management flexibility, and enable communication between computers and private circuits on computer communications with the same security.
K. Zhang et al., "The Status and Development Trends of Virtual Private Network Technology", Key Engineering Materials, Vols. 474-476, pp. 79-82, 2011