Virtual Private Networks


  1. Company with multiple locations wants everything to appear as one big network
  2. Workers want access to resources restricted to company internal network
  3. Users want to bypass regional blocks

VPN Encapsulation

  • Virtual end points establish software association between them (e.g. TCP connection) usually referred to as a tunnel
  • Routing rules on local machine send traffic to virtual interface
  • Virtual card encapsulates IP message and sends it through tunnel
  • Receiver receives message and sends it through its own network