EverLink Virtual Private Networks (VPN) can be implemented as an Intranet also and completely replace a private Wide Area Network (WAN). VPN connect both branch offices and tellecommuters into an enterprise-wide corporate network via the Internet, and can eliminate all long distance charges, along with the management and security reponsibilities of maintaining private networks.
EverLink VPN differ from ordinary networks in three ways:

EverLink Virtual Private Networks allow any valid remote user to become part of a corporate central network, using the same network scheme and addressing as users on this central network.

Each Corporate’s central network can also be responsible for validating their own users, despite the fact that they are actually dialling into a public network.

The Internet Service Provider can give each of their customer’s a unique dial-up telephone number which will distinguish their service from any other. But this is depend on the software that will be used by the remote user.

Benefits:

Secure data transmission with Tunneling Protocol through Internet
Cost effectiveness with eliminate long distance charges
Example use of EverLinkVPN

A remote employee wants to connect into the corporate network and access their company’s internal web.
Step 1.
The remote user dials into their local ISP and logs into the ISP’s network as usual.

Step 2.
When connectivity to the corporate network is desired, the user initiates a tunnel request to the destination Security server on the corporate network. The Security server authenticates the user and creates the other end of tunnel.

Step 3.
The user then sends data through the tunnel which encrypted by the EverLink VPN software before being sent over the ISP connection.

Step 4.
The destination Security server receives the encrypted data and decrypts. The Security server then forwards the decrypted data packets onto the corporate network. Any information sent back to the Remote user is also encrypted before being sent over the Internet.

The figure below illustrates that EverLink VPN software can be used from any location through any existing ISP’s dial-in service.