Virtual private network services: scenarios, requirements and architectural constructs from a standardization perspective

@article{Carugi2004VirtualPN,
  title={Virtual private network services: scenarios, requirements and architectural constructs from a standardization perspective},
  author={Marco Carugi and Jeremy De Clercq},
  journal={IEEE Communications Magazine},
  year={2004},
  volume={42},
  pages={116-122}
}
This article describes scenarios, general requirements, and architectural constructs for the emerging category of services known as virtual private networks. According to the adopted reference models, the principal architectural choices in the service provider solution space and current VPN-related standardization initiatives are introduced.