| Exam 640-692 | Question id=178 | Service-related Knowledge |
Which of the following statements are true about a smart jack?
| A. |
It provides signal conversion. | |
| B. |
It operates at Layer 2 of the OSI model. | |
| C. |
It regenerates the signal to compensate for signal degradation from line transmission. | |
| D. |
It provides loopback testing. | |
| E. |
It acts as a concentration point for dial-in and dial-out connections. |