Advantage of VPN


  • Reduce cost implementation (We don’t need to use lease line/ ISDN/ FR, mobile only need to dial local ISP to connect to branch office)
  • Security (VPN provide strong security mechanism through encryption, authentication etc.)
  • Lower cost (Bring down cost of Wan equipment)
  • More Flexible
  • Simple Management
  • Tunnel topology
  • Interoperability of devices from multiple vendors
  • Centralized VPN management
  • Easy implementation
  • Easy usability
  • Scalability
  • Performance
  • Bandwidth management
  • Service provider’s infrastructure
  • High availability
  • Protect traffic across internet
  • Protect data through hackers
  • Protect through eavesdropping
  • Protect through Man-in-Middle attack


  • Highly dependent on Internet
  • Lack of support to legacy protocol