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
正确答案:F
答案解析:有
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