Which three are correct about L2TP tunnel selection alg

多项选择题

Which three are correct about L2TP tunnel selection algorithms? （）(Choose three.)

A. Failover between preference levels is the default.
B. One algothrim is failover within a preference level.
C. Failover across all preference levels is the default.
D. One algothrim is failover between preference levels.
E. One algothrim is failover across all preference levels.

JN0-130