Virtual Private Network. Enhanced Internet security is achieved by using either application-level encryption or network layer encryption gateways and routers, with a firewall for additional security. By contrast, Internet based connections, are largely distance-insensitive. Internet infrastructure is 'already installed' throughout the world so when you set up your private network there are significantly fewer costs incurred in installing new lines etc. If you choose a fully managed service, your operational costs per VPN site are significantly reduced.
Businesses can choose from a variety of bandwidth capacity ranges and billing models.
And even systems that do not completely comply with Internet standards can take advantage of the Internet through protocol tunneling and application proxying. And coverage is probably the single biggest advantage of moving your VPN onto an IP-based infrastructure. Because Internet infrastructure is already in place throughout many areas of the world, and because systems such as the Xedia QVPN builder can automate the process of configuring the VPN, Internet VPNs can be very scalable compared to conventional WANs. This can make it much simpler, faster and cheaper to add new sites to your network. However, organizations are often wary of passing internal company data across the Internet.