This design guide defines the comprehensive functional components required to build an enterprise virtual private network (VPN) solution that can transport IP telephony and video. This design guide identifies the individual hardware requirements and their interconnections, software features, management needs, and partner dependencies, to enable customers to deploy, manage, and maintain an enterprise VPN solution.
Transport diversity is a general terminology used for selecting or preferring a network exit-point for
end-user application traffic across network topologies that have a variety of characteristics. These
characteristics include things like monetary cost, reliability or availability, availability of bandwidth, and
One example of transport diversity is a branch office environment that has a primary path using Frame
Relay and a backup or alternate path using basic rate ISDN.