What are different types of VPN

Deployment classification

  1. Site to Site VPN
  2. Remote VPN

 Classification based on OSI layers

  1. Layer 4/7 VPN – WebVPN
  2. Layer 3 VPN – IPSec, GREoIPSec
  3. Layer 2 VPN – L2TP, PPTP, MPPE

Classification based on trust level

  1. Intranet VPN
  2. Extranet VPN
  3. Remote VPN

 Customer point of view classifications

 1.   Traditonal VPN

  • Frame-relay (L2 VPN)
  • ATM VPN (L2 VPN)

2.   CPE based VPN

  • L2TP and PPTP (Layer 2 VPN)
  • IPSec VPN (Layer 3 VPN)

3.  Provider Provisioned VPN

  • BGP/MPLS (L2/L3 VPN)

4.  Session based VPN

  • SSLVPN/WebVPN (L4/L7 VPN)