When is a first-hop redundancy protoco

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

A when HSRP is not supported by the design
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
E when the design implements Layer 2 between the access switch and the distribution switch
F when the design implements Layer 3 between the access switch and the distribution switch

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分类：CCDP(642-873)题库

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