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Amazon EBS
Volume types, performance tiers, IOPS/throughput/latency, and database & big-data storage workloads.
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AWS Networking
VPC design, routing, connectivity (VPN/Direct Connect/PrivateLink), load balancing, DNS, and content delivery.
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Amazon EC2
Instance types & pricing models, Auto Scaling, placement groups, AMIs, metadata, hibernation, and cost optimization.
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