N10-005 · Question #505
A company is connected to an ISP, but owns the premise router with an internal CSU/DSU. Which of the following is considered the demarc?
The correct answer is C. Smart jack. The demarcation point (demarc) is the physical boundary where the ISP's responsibility ends and the customer's responsibility begins. A smart jack (also called a Network Interface Device or NID) is the device installed at the customer's premises by the ISP that serves as this…
Question
A company is connected to an ISP, but owns the premise router with an internal CSU/DSU. Which of the following is considered the demarc?
Options
- APremise router
- BISP router
- CSmart jack
- DCSU/DSU
How the community answered
(62 responses)- A2% (1)
- B5% (3)
- C92% (57)
- D2% (1)
Explanation
The demarcation point (demarc) is the physical boundary where the ISP's responsibility ends and the customer's responsibility begins. A smart jack (also called a Network Interface Device or NID) is the device installed at the customer's premises by the ISP that serves as this boundary - everything on the ISP side of the smart jack belongs to the carrier; everything beyond it (including the CSU/DSU and premise router) belongs to the customer. Even though the company owns the CSU/DSU and router, the smart jack remains the official demarc. The ISP router is on the carrier's side. The premise router and internal CSU/DSU are on the customer's side, past the demarc.
Topics
Community Discussion
No community discussion yet for this question.