What benefit does Stateful Switchover (SSO) provide?
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Correct answer: minimal network downtime following an RP switchover.
Why this is the answer
Stateful Switchover (SSO) ensures minimal network downtime by maintaining control plane and forwarding state information during a Route Processor (RP) switchover in redundant router systems. The standby RP is kept synchronized with the active RP, allowing for a near-instantaneous takeover without re-initialization of routing protocols or loss of established sessions. IP first-hop redundancy (like HSRP or VRRP) provides gateway redundancy for end devices, not RP redundancy. Communication between different nodes for cluster setup is a general concept, not specific to SSO's benefit. Physical link redundancy (like EtherChannel or redundant cabling) protects against link failures, not RP failures.
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