| Exam 642-887 | Question id=3211 | MPLS/LDP in a Service Provider IP NGN Environment |
LDP session protection uses which one to maintain the LDP session between LDP neighbors?
| A. |
LDP NSF | |
| B. |
LDP NSR | |
| C. |
backup-targeted LDP hellos | |
| D. |
BFD | |
| E. |
LDP-IGP synchronization |