Which three terms describe the primary functions of the distribution layer of the campus network design hierarchy? (Chose three)

A.
provides end-user connectivity

B.
provides high speed transport

C.
provides QoS services

D.
enforces security policies

E.
provides WAN connection

F.
connects access devices to the core backbone

Explanation:
D, C, F are properties of distribution layer. Link: http://www.cisco.com/en/US/docs/solutions/Enterprise/Campus/campover.html#wp708979