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High Availability Network Fundamentals by Chris Oggerino

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A VoIP over Cable Network

The network to be used in this chapter is a cable network. End customers are connected to the network using coax cable, which is the same cable that provides their TV signal. We will call this cabling the Hybrid Fiber Coaxial (HFC) network.

To divide the network into smaller parts, we are going to create four diagrams describing the major components of our network. Those will be what some folks would call the ingress, egress, and control portions of the network. These are each connected to a common backbone. Ingress is called that because traffic normally originates at the customer site and moves into the network. Egress is called that because that can become the final destination of much of the traffic. Control is called ...

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