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→Different Types of VPN Services
==Different Types of VPN Services==
==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>
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.
* Encrypted VPN - data is 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
* 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>
* Optical Private Networks - is a high speed networking using the SDH (Synchronous Digital Hierarchy), a major transmission technology that 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>
[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>