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