WHAT IS A VPN (virtual private network)?
A VPN or Virtual Private Network is a method used to add security and privacy to private and public networks, like WiFi Hotspots and the Internet. VPN is used to hide the ip address of the particular computer .VPNs are most often used by corporations to protect sensitive data. However, using a personal VPN is increasingly becoming more popular as more interactions that were previously face-to-face transition to the Internet. Privacy is increased with a VPN because the user’s initial IP address is replaced with one from the VPN provider.This method allows subscribers to attain an IP address from any gateway city the VPN service provides. For example you live in Nepal then by using VPN service you can appear to live in Russia,Australia,China and various other countries .
Security is the main reason why corporations have used VPNs for years. There are increasingly simple methods to intercept data traveling to a network. WiFi spoofing and Firesheep are two easy ways to hack information. A useful analogy is that a firewall protects your data while on the computer and a VPN protects your data on the web. VPNs use advanced encryption protocols and secure tunneling techniques to encapsulate all online data transfers. Most computer users wouldn’t dream of connecting to the Internet without a firewall and up-to-date antivirus. Evolving security threats and ever increasing reliance on the Internet make a VPN an essential part of well-rounded security. Integrity checks ensure that no data is lost and that the connection has not been hijacked. Since all traffic is protected, this method is preferred to proxies.
The number of protocols and security features continue to grow with time. The most common protocols in VPN are :
PPTP : PPTP has been around since the days of Windows 95. The main selling point of PPTP is that it can be simply setup on every major OS. In short, PPTP tunnels a point-to-point connection over the GRE protocol. Unfortunately, the security of the PPTP protocol has been called into question in recent years. It is still strong, but not the most secure.
LT2P/IPsec : L2TP over IPsec is more secure than PPTP and offers more features. L2TP/IPsec is a way of implementing two protocols together in order to gain the best features of each. In this case, the L2TP protocol is used to create a tunnel and IPsec provides a secure channel. This makes for an impressively secure package.
OPEN VPN : OpenVPN is an SSL-based VPN that continues to gain popularity. The software used is open source and freely available. SSL is a mature encryption protocol, and OpenVPN can run on a single UDP or TCP port, making it extremely flexible.
There are many choices when it comes to VPN providers. There are some VPN providers who offer free service and there are some which charge for VPN service.It is found that paid VPN like Express VPN re preffered to the free service providers. Paid VPN providers offer robust gateways, proven security, free software, and unmatched speed. There are various choices in market and you are free to chose any vpn you like
This is it for this topic, hope it gave some idea about vpn