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Advantages
- 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
Disadvantages
- Highly dependent on Internet
- Lack of support to legacy protocol