What is Remote-access VPNs?
In a Remote-access VPNs, individual hosts or clients, such as telecommuters, mobile users, and extranet consumers, are able to access a company network securely over the Internet. Each host typically has VPN client software loaded or uses a web-based client.
A remote-access VPN host or client typically has VPN client software. Whenever the host tries to send any information, the VPN client software encapsulates and encrypts the information before sending it over the Internet to the VPN gateway at the edge of the target network. On receipt, the VPN gateway handles the data in the same way as it would handle data from a site-to-site VPN.
There’s more than one way to create and enable a VPN. The first approach uses IPsec, IPsec is used to create authentication and encryption services between endpoints on an IP network.
The second way is via tunneling protocols, which allow you to establish a tunnel between endpoints on a network.
And understand that the tunnel itself is a means for data or protocols to be encapsulated inside another protocol