| Exam 300-115 | Question id=1360 | Layer 2 Technologies |
Which statement about the UDLD protocol is true?
| A. |
UDLD is a Cisco-proprietary Layer 2 protocol that enables devices to monitor the physical status of links and detect unidirectional failures. | |
| B. |
UDLD is a Cisco-proprietary Layer 2 protocol that enables devices to advertise their identity, capabilities, and neighbors on a local area network. | |
| C. |
UDLD is a standardized Layer 2 protocol that enables devices to monitor the physical status of links and detect nidirectional failures. | |
| D. |
UDLD is a standardized Layer 2 protocol that enables devices to advertise their identity, capabilities, and neighbors on a local area network. |
The Cisco-proprietary UDLD protocol monitors the physical configuration of the links between devices and ports that support UDLD. UDLD detects the existence of unidirectional links. When a unidirectional link is detected, UDLD puts the affected port into the errdisabled state and alerts the user.