Company XYZ wants to use the FCAPS ISO standard for network management design, focusing on...

A (Fault management):Covers detection, isolation, notification, and resolution of network issues to ensure minimal downtime and service disruptions, directly aligning with the design goal of preventing and mitigating outages.

Other options explained:

B: Performance management monitors resource usage but doesn’t directly handle faults.

C: Security management handles authorization, authentication, and protection.

D: Accounting management deals with usage tracking for billing and auditing.