Which three layers must use cisco nonstop forwarding to reduce service impact in case of failure?

Refer to Exhibit.

Which three layers must use cisco nonstop forwarding to reduce service impact in case of failure?
A . Enterprise Edge
B . Dual-attached Server Layer
C . Enterprise Non-Routed Access Layer
D . Enterprise Core
E . Enterprise Non-Routed Distribution Layer
F . Service Provider Edge

View Answer

Answer: A,D,F

Explanation:

https://www.cisco.com/en/US/technologies/tk869/tk769/technologies_white_paper0900aecd801dc5e2.html