The requirement for high availability within the Data Center network may cause the designer to consider which one of the following solutions?
A.
Construct a hierarchical network design using EtherChannel between a server and two VDCs from the same physical switch
B.
Utilize Cisco NSF with SSO to provide intrachassis SSO at Layers 2 to 4
C.
Define the Data Center as an OSPF NSSA area, advertising a default route into the DC And summarizing the routes out of the NSSA to the Campus Core
D.
Implement network services for the Data Center as a separate services layer using active/active model that is more predictable in failure conditions
Explanation: