What AWS service is primarily used for monitoring resources?

Amazon CloudWatch is a powerful service designed to monitor and manage AWS resources and applications. It provides real-time data and insights into resource utilization, application performance, and operational health.

CloudWatch collects metrics from various AWS services, such as EC2 instances, RDS databases, and Lambda functions, allowing users to track performance and operational health visually. Users can set up alarms to notify them of potential issues, automate responses to certain events, and create dashboards to display metrics in customizable formats.

By leveraging CloudWatch, organizations can ensure that their applications and resources are running optimally, thus improving overall service availability and reliability. This dedicated monitoring capability makes CloudWatch the ideal choice among the options listed for monitoring AWS resources effectively.

Other services mentioned, like Amazon Route 53, which is primarily a DNS service, or Amazon CloudFront, which is a content delivery network, do not focus on monitoring resources but rather on routing and delivering content effectively. Similarly, AWS WAF (Web Application Firewall) is designed for securing applications from web attacks rather than monitoring resource metrics. Thus, they do not offer the comprehensive monitoring capabilities that CloudWatch provides.