How many servers does the Avaya Aura Communication Manager High Availability Duplex Cluster consist of?

The correct answer indicates that an Avaya Aura Communication Manager High Availability Duplex Cluster consists of two servers, configured with one server actively processing calls and another server serving as a standby. This architecture is designed to enhance reliability and ensure continuous operation; if the active server encounters issues or goes offline, the standby server can immediately take over without impacting service.

This type of configuration is crucial for maintaining redundancy and minimizing downtime, particularly in communications environments where uninterrupted service is critical. The concept of having a standby server also aligns with industry best practices for disaster recovery and business continuity, as it provides a backup that is ready to operate with minimal lag time.

The other choices suggest configurations that either exceed or fall short of the standard duplex setup. For instance, having three or four servers introduces unnecessary complexity for a high availability duplex cluster, which traditionally relies on just one active and one standby server to provide the necessary failover capabilities effectively. This design makes the duplex cluster particularly efficient while ensuring that resources are not wasted on additional standby servers that would not be utilized unless a failure occurred in the active server.