What are two considerations when using SSO for supervisor redundancy? (Choose two.)

Stateful Switchover (SSO) is a redundancy mechanism that ensures the standby supervisor engine is fully synchronized with the active supervisor engine. This synchronization is crucial for maintaining continuous connectivity during a failover, as it allows the standby to immediately take over without service interruption. While SSO handles Layer 2 and some Layer 3 state, it must be combined with Nonstop Forwarding (NSF) to maintain uninterrupted Layer 3 forwarding. NSF allows routing protocols to gracefully restart and re-establish adjacencies without dropping existing data plane traffic. Multicast state is generally not preserved across SSO failover without additional configurations like PIM Nonstop Forwarding. Each supervisor engine does not require separate configuration; the configuration is shared. SSO primarily focuses on Layer 3 forwarding continuity when paired with NSF, not Layer 2 operations, which are largely handled by the state synchronization itself.