In a single-tenant dwelling, the demarcation point is located within how many inches of entering the premises?

In a single-tenant dwelling, the demarcation point is located within how many inches of entering the premises?

• A. 6 inches
• B. 12 inches
• C. 18 inches
• D. 24 inches

Answer: (B)

The demarcation point marks where the service provider’s network ends and the customer’s internal wiring begins, and placing it within twelve inches of where service enters the building keeps this boundary at a consistent, easily accessible location. This proximity makes testing, troubleshooting, and service visits straightforward and clearly defines responsibility without burying the interface inside walls. Six inches is too tight for typical hardware, while eighteen or twenty-four inches would push the boundary further inside and reduce accessibility, so twelve inches is the standard and best choice.

The demarcation point marks where the service provider’s network ends and the customer’s internal wiring begins, and placing it within twelve inches of where service enters the building keeps this boundary at a consistent, easily accessible location. This proximity makes testing, troubleshooting, and service visits straightforward and clearly defines responsibility without burying the interface inside walls. Six inches is too tight for typical hardware, while eighteen or twenty-four inches would push the boundary further inside and reduce accessibility, so twelve inches is the standard and best choice.