Which statement best describes the demarcation point in service delivery?

• A. It marks the boundary of the building's electrical service
• B. It marks the boundary between provider and customer responsibilities
• C. It is where the network router is located
• D. It determines service pricing

Answer: (B)

The demarcation point is the boundary where the service provider’s network ends and the customer’s internal network begins. It defines who is responsible for maintenance, fault isolation, and service levels. Up to this point (often represented by the network interface device), the provider handles the service; beyond it, the customer takes over the wiring, devices, and inside equipment. The router’s location isn’t what defines the point—the boundary is about responsibility. It doesn’t set pricing either. So the statement that best describes it is that it marks the boundary between provider and customer responsibilities.