Structured Cabling: Understanding Demarcation Points

Where is a demarc located in relation to the structured cabling of an enterprise environment?

-in the work area
-in the Main Distribution Frame (MDF)
-between the MDF and the IDF
-at the Intermediate Distribution Frame (IDF)

Answer:

A demarcation point (demarc) in structured cabling is typically located in the Main Distribution Frame (MDF).

Explanation: In an enterprise environment, a demarc (short for demarcation point) is usually located in the Main Distribution Frame (MDF). This is a critical juncture where the responsibility for maintaining and managing the cabling system transitions from the service provider to the customer. It is also the point that connects the service provider's telecommunications line to the customer's on-premises wiring. In other words, the demarc essentially separates the customer's wiring systems from the service provider's infrastructure. An example would be where the box of your internet service provider is installed; it is generally the starting point for your structured cabling system.