A VPN (virtual private network) is a secure and private communication tunnel between a client PC (or any device) and VPN servers across the public internet.
By running different types of VPN software on the client side, all of the data is transmitted securely despite it being sent across the public internet.
The PPTP connection involves MSCHAP-V2 for authentication and MPPE 128-bit for encryption to give users a very strong protection of their network data.
Free VPN adds a flexible, additional layer of security and safety when using open wireless connections in public areas, for example Airports, Hotels, McDonalds and Pub or Restaurant hotspots.
VPN provides anonymous web browsing by hiding your real IP address through the VPN connection. Your connection can't be spied on or intercepted, and the websites you visit, emails you send and data you submit are all kept private.
VPN uses strong encryption to ensure no packets have been altered. Among many VPN protocols, Microsoft PPTP (Point to Point Tunneling Protocol) is the most popular one with decent encryption and strong ID/password based authentication.
VPN uses the most popular PPTP (Point-to-Point Tunneling) protocol that is widely supported across all the operating systems and platforms available today, though Apple no longer supports PPTP and requires third party apps to implement it.
VPN's have been widely used to make service providers think that you are connected to the internet in a different location to where you really are. So for content such as online TV, which can be restricted to certain countries, the use of a VPN means the provider thinks you are in the correct country to be able to view the programs. An example would be the BBC's iPlayer or Sky Go, and some gambling sites that are not licensed to operate in the UK.
Free VPN services are widely available, but do have some disadvantages over paid for VPN. The free VPN service may be a bit slower, not as unreliable, and you may be unsure as to what information it is collecting about your data and web browsing habits. If privacy is not a concern then you may not be bothered about the collection of data from your VPN account.