How exactly the VPN works?

Answer 1

Virtual private networking and security is a serious issue, because if proper security measures are not taken, it helps intruders get in. This is because VPNs already have tunneling protocols built in to get data in and out of the network.

The L2TP/IPSec VPN protocol should be applied because it provides a higher level of security as it uses the IPSec encryption protocol to secure the connection and enforces machine authentication as well as user authentication.

Not that your asking for tips on how to set one up :P

Answer 2

Firstly VPN (stands for Virtual Private Network) uses a secured tunnel connecting between 2 locations accross the internet. The secured part is usually taken care of by the domain controller of the host network which authenticate whether the client is a valid user or not. Once a VPN connection is setup, you would need to initiate the connection first, then the domain controller will authenticate your ID, then after authentication, it will assign an IP address to your client and then you are in an environment just like you are in your office (if you are connecting to your corporate network via VPN

Answer 3

Try this: http://en.wikipedia.org/wiki/Vpn