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VPN is a private network that uses PDN (Public Data Network) services for internal communication
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VPN is not truly private because an organization shares the PDN infrastructure with others. It is virtually private because all users enjoy reliable and secure communications at desired levels of performance
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VPN is cost effective, flexible and affordable. VPNs offer a savings of up to 60% over equivalent private networks. Renting data bandwidth in a data-optimized PDN is more flexible and cost-effective than building it in the voice-oriented PSTN (Public Switched Telephone Network)
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VPNs typically include a number of security features including encryption, authentication, and tunneling.
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