What are two considerations when using SSO as a network redundancy feature? (Choose two)

What are two considerations when using SSO as a network redundancy feature? (Choose two)
A . both supervisors must be configured separately
B . the multicast state is preserved during switchover
C . must be combined with NSF to support uninterrupted Layer 2 operations
D . must be combined with NSF to support uninterrupted Layer 3 operations
E . requires synchronization between supervisors in order to guarantee continuous connectivity

View Answer

Answer: D, E

Explanation:

Cisco IOS Nonstop Forwarding (NSF) always runs with stateful switchover (SSO) and provides redundancy for Layer 3 traffic.

Reference: https://www.cisco.com/en/US/docs/switches/lan/catalyst3850/software/release/3se/consolidated_guide/b_consolidated_3850_3se_cg_chapter_01101110.pdf