VPN security also includes authentication, authorization , encapsulation and access control . The leading security protocols are PPTP and IPSec . There are many people in an organization that need access to the network. Business travellers may want to run a spreadsheet in a client's office, or check e-mail from their hotel. Telecommuters and after hours workers can finish off a job in the convenience of their own home.
Remote sites can access corporate databases, update inventories and share files and applications.
Businesses can execute transactions with trusted suppliers and clients. For each, a VPN is convenient, secure, affordable and reliable. A VPN creates a tunnel through the Internet by encapsulating and encrypting packets of data. The tunnel itself is first established through a process of authentication, where the identity of the source and destination is verified. All traffic travelling through the tunnel is encrypted to ensure that it is private and secure.