Classes of VPN

VPN trusts a user to connect to private resources securely over public            infrastructure networks that we don't trust. VPN creates an encrypted connection (known as a secure VPN tunnel) and all data traffic passes through this secure tunnel. 

Let’s consider several different VPNs and think about where they fit. We’ll look at two main classes of VPN, which I will refer to as remote access VPNs and network-based site-to-site VPNs:

• Remote access VPN: This is a perfect solution for users who need to connect to a corporate network to gain access to IT resources remotely. For example, telecommuters, mobile users, and extranet users. The connection between the user and the corp network happens through the internet. VPNs might require users to install the VPN client firewall vendors' specific...