ISC2 Certified Cloud Security Professional (CCSP) Practice Question
A cloud security professional must integrate availability-management controls for a revenue-critical SaaS workload that runs on ten Linux VMs spread evenly across two availability zones. The business guarantees 99.95 % monthly uptime and insists that weekly OS security patches be applied without causing customer-visible outages. Which action best satisfies the availability objective while still allowing timely patching?
Use rolling updates with the auto-scaling group so only a subset of instances is taken out of service at a time and traffic is routed to healthy nodes in both zones.
Migrate the workload to a single larger virtual machine with live kernel-patching enabled to avoid reboots during updates.
Perform in-place patching on all instances simultaneously during a weekly two-hour maintenance window when traffic is historically low.
Install host-based intrusion-detection agents on every virtual machine to alert on missing patches.
Rolling updates (or blue/green deployments) applied through an auto-scaling group patch only a small batch of instances at a time. The load balancer's health probes automatically shift traffic to healthy nodes in both zones, so enough capacity remains online to keep downtime well below the 0.05 % monthly threshold. The other options either risk a full outage, fail to address patching-related downtime, or undermine the multi-instance design.
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Why are availability zones important for high availability in cloud workloads?
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What is an auto-scaling group?
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ISC2 Certified Cloud Security Professional (CCSP)
Cloud Security Operations
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