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[[Image:UnderConstruction.png]]
[[Image:UnderConstruction.png]]
'''VPN''' is an acronym for '''Virtual Private Network'''which uses public network infrastructures to provide connection or communication services for users who are travelling or in remote areas. VPN is a form of Wide Area Network ([[WAN]]) which utilizes the internet or private networks and special protocols to enable users to share files, conduct video conferencing, access to network resources, databases and websites.<ref>[http://computer.howstuffworks.com/vpn.htm How VPNs Work]</ref>
'''VPN''' is an acronym for '''Virtual Private Network'''which uses public network infrastructures to provide connection or communication services for users who are travelling or in remote areas. VPN is a form of Wide Area Network ([[WAN]]) which utilizes the internet or private networks and special protocols to enable users to share files, conduct video conferencing, access to network resources, databases and websites.<ref>[http://computer.howstuffworks.com/vpn.htm How VPNs Work]</ref> It main objective is to provide a private and secure connection for users through a public network usually the internet.
==Different Types of VPN Services==
There are three different types of VPN services:<ref>[http://www.ja.net/documents/development/vpn/different-flavours-of-vpn-web.pdf Different Flavours of VPN: Technology and Applications]</ref>
* Encrypted VPN- data are encrypted to ensure that information exchange is secured from hackers.
* Tunnel-based VPN- This type of VPN uses the method of tunneling or logical channels within the providers network
* Optical Private Networks- is a high speed networking using the SDH (Synchronous Digital Hierarchy), a major transmission technology which enables easier synchronization to interconnect networks between carriers <ref>
[http://technologyinside.com/2007/03/08/networks-part-6-sdh-the-great-survivor/ SONET – SDH, the great survivors]</ref> and DWDM (Dense Wavelength Division Multiplexing), a technology which allows the delivery of ten of terabits of data over a single fiber using 40 to 80 simultaneous wavelengths.<ref>[http://technologyinside.com/2007/03/30/making-sdh-dwdm-and-packet-friendy/ Making SDH and DWDM packet friendly]</ref>
==References==
==References==