Your company needs a network design that guarantees zero downtime when a server undergoes maintenance or experiences an unexpected failure. Which system configuration best meets this requirement?
Single-server system
Active-active
Clustered environment without specific configuration for high availability
Active-passive
An active-active configuration runs multiple servers simultaneously, distributing the workload. Because every node is already online and processing requests, the remaining nodes can immediately handle the full load if one node is taken down for maintenance or fails unexpectedly, so users experience no service interruption. In an active-passive design, only the primary server is serving traffic, so a short failover interval is required to bring the standby node online, resulting in brief downtime. A single-server system provides no redundancy at all, and a generic cluster without an active-active high-availability setup lacks both load sharing and instantaneous failover.
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