Answer: High Availability

## Explanation AWS Trusted Advisor provides recommendations across several categories to help optimize your AWS environment. The standard categories are: - **Security** - Identifies security gaps and provides recommendations for security best practices - **Cost Optimization** - Helps identify unused or underutilized resources to reduce costs - **Performance** - Monitors service limits and provides performance optimization suggestions - **Fault Tolerance** - Provides recommendations to improve application resilience and availability **High Availability** is not a distinct category in AWS Trusted Advisor. While fault tolerance and high availability are related concepts, Trusted Advisor specifically uses the "Fault Tolerance" category rather than "High Availability." ### AWS Trusted Advisor Categories: 1. **Security** - Security group configurations, IAM usage, MFA on root account 2. **Cost Optimization** - Idle load balancers, underutilized EBS volumes, unused Elastic IPs 3. **Performance** - Service limits, overutilized EBS volumes, high latency 4. **Fault Tolerance** - EBS snapshots, multi-AZ deployments, backup configurations The correct answer is **B (High Availability)** because it's not one of the four main categories that AWS Trusted Advisor uses for its recommendations.

Author: Ritesh Yadav