Virtual Private Network
VPN is an acronym for Virtual Private Networkwhich 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.[1] 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:[2]
- 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 [3] 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.[4]