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A demarc is where one network ends and another begins. Demarc stands for demarcation point. It is the physical point at which the public network of a telecommunications company ends and the private network of a customer begins.

However, the distinction between where one category of network begins and another ends is sometimes blurry.

Demarc is where one network ends and another begins. Demarc stands for demarcation point.

It is the physical point at which the public network of a telecommunications company ends and the private network of a customer begins.

What type of network address space allows for nodes on a network to communicate?

Not-routable address space permit for nodes to interact with each other on onekind  network. hence every computer requires not be connected to every other computer on Internet, not routable address spaces can be used regionally in various private networks.

However, the distinction between where one category of network begins and another ends is sometimes blurry.

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