VPN users have certain expectations and requirements for their VPN service. In a nutshell,
they want their service to be both private and secure. In other words, they want their VPN
to be as secure as with dedicated circuits while gaining the scalability benefits of a shared
infrastructure. Both concepts, of privacy and security, are not black and white, and need to
be defined for a real world implementation.
This chapter defines typical VPN security requirements, based on the threat model
developed in the previous chapter, and discusses in detail how MPLS can fulfill them. The
typical VPN security ...
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