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As the threat of stealing sensitive data by attackers, many people have trend for a better solution. So VPN has become increasingly essential.

VPN (Virtual Private Network) is a network that is constructed by using public wires- usually the internet, to connect to a private network such as a company’s internal network. By using a VPN, business ensure security, anyone intercepting the encrypted data cannot read it.

This diagram illustrates the difference between using an unencrypted connection and using a VPN-secured Internet connection at your average coffee shop.

Encrypting your web connection by using a VPN service is extremely useful. A VPN achieves 2 technical results:

• A VPN cloaks and encrypts your signal, making your online activity completely illegible to any eavesdroppers
• A VPN manipulates your IP address, making you appear to come from a different machine, location or country

By adding a VPN, a business can extend all its intranet’s resources to employees working from remote offices or their homes.

You can use following networking protocols for VPN,

• Point-to-Point Tunneling Protocol (PPTP) is the least secure VPN method, but every OS supports it
• Layer 2 Tunneling Protocol (L2TP) and Internet Protocol Security (IPsec) are more secure than PPTP and are almost as widely supported
• SSL VPN systems provide the same level of security that you trust when you log on to banking sites and other sensitive domains
• OpenVPN is exactly what it sounds like: an open-source VPN system that’s based on SSL code

References:

• http://www.pcworld.com/article/2030763/how-and-why-to-set-up-a-vpn-today.html
  
• http://netforbeginners.about.com/b/2014/02/26/why-use-a-vpn-here-are-10-good-reasons.htm