When is a first-hop redundancy protocol needed in the d…

When is a first-hop redundancy protocol needed in the distribution layer?

When is a first-hop redundancy protocol needed in the distribution layer?

A.
when the design implements Layer 2 between the access and distribution blocks

B.
when multiple vendor devices need to be supported

C.
when preempt tuning of the default gateway is needed

D.
when a robust method of backing up the default gateway is needed



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