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
E.
when the design implements Layer 2 between the access switch and the distribution blocks
A
A first-hop redundancy protocol is needed only if the design implements Layer 2
between the access switch and the distribution switch. If Layer 3 is supported to the
access switch, the default gateway for end devices is at the access level.