Refer to the exhibit.
The customer requirements include resilience for branch communications. If anyone link fails, a branch can still reach the main office servers. In addition either one of the 5920 switches at the core of the WAN should be able to fail with branches still maintaining their connections.
What should the network architect include in the design to meet this requirement?
A . A connection directly to an ISP to each branch router, which also requires the OSPF area to become a not so stubby area (NSSA)
B . Virtual Router Redundancy Protocol (VRRP) enabled and configured in the switches in the 5920 IRF group
C . Graceful restart on the 5920 IRF group in standard IETF mode
D . A floating static route on the branch switches to the 5920 IRF group in case the OSPF solution fails
Answer: D