You are designing a small branch office that requires these attributes:
support for 60 users
the growth capacity to add another 15 users soon
redundant access
higher bandwidth between the Layer 2 switch and routing to the WAN
Which branch office topology or technology must be used?

A.
EtherChannel

B.
loop-free

C.
three-tier

D.
two-tier

E.
integrated routing and switching