多项选择题
A. A successor route is used by EIGRP to forward traffic to a destination.
B. Successor routes are saved in the topology table to be used if the primary route fails.
C. Successor routes are flagged as "active" in the routing table.
D. A successor route may be backed up by a feasible successor route.
E. Successor routes are stored in the neighbor table following the discovery process.
F. Successors are not used in EIGRP.
单项选择题 You are troubleshooting a frame relay connection and wish to view the LMI traffic stats. Which command should you issue?（）
多项选择题 A new frame relay connection is being brought up. Which of the following are frame relay LMI type options that can be configured on this new link?（）
单项选择题 In a lab, two routers are connected directly together using serial interfaces in a back-to-back configuration. No external DCE devices are being used. What additional command is needed to bring this link up?（）