Home » CompTIA » JK0-019 » Which of the following is the Telco end of a T1 demarc?
Which of the following is the Telco end of a T1 demarc?
A. Smart jack
B. Network tap
C. Proxy server
D. IDF
Correct Answer: A
Explanation/Reference:
Explanation: Smartjacks provides diagnostic capabilities. A very common capability provided by a smartjack is loopback, such that the signal from the telephone company is transmitted back to the telephone company. This allows the telephone company to test the line from the central office, without the need to have test equipment at the customer site. The telephone company usually has the ability to remotely activate loopback, without even needing personnel at the customer site. When looped back, the customer equipment is disconnected from the line.
