Which two of the following are characteristics of the campus layer hierarchy tiers? (Choose
two.)
A.
Each layer in the hierarchy can perform the functions of the other layers.
B.
The network can have two tiers of switches combined into one.
C.
A network may have four or more physical tiers of switches, if necessary.
D.
There are absolute rules for how a campus network is physically built.
E.
Having three physical tiers is a strict requirement.