A security group is a stateful virtual firewall that controls inbound and outbound traffic for AWS resources such as EC2 instances. Because it is stateful, return traffic is automatically allowed; SysOps troubleshooting often compares security groups against stateless network ACLs.
Amazon CloudWatch is a monitoring and observability service that collects metrics, logs, and events from AWS resources.
A CloudWatch alarm is a rule that watches a metric and changes state when it crosses a threshold, triggering actions such as notifying an SNS topic, scaling a group, or recovering an EC2 instance.
Amazon EventBridge is an event bus service that routes events from AWS services and applications to targets such as Lambda functions or Systems Manager Automation.
Amazon EC2 Auto Scaling is a service that automatically adjusts the number of EC2 instances in a group to match demand using scaling policies and health checks.
AWS CloudFormation is an infrastructure-as-code service that provisions and manages AWS resources from declarative templates.
AWS Systems Manager is a service for operating and automating management of AWS resources at scale, including Automation runbooks, Run Command, State Manager, Patch Manager, and Parameter Store.
A Multi-AZ deployment runs resources across two or more Availability Zones so a failure in one zone does not take down the workload.
AWS Backup is a centralized service that automates and manages backups across AWS services such as EBS, RDS, DynamoDB, and EFS using backup plans and vaults.
Amazon Elastic Block Store (EBS) is a block-storage service providing volumes for EC2 instances, with types ranging from general-purpose SSD (gp3) to provisioned-IOPS SSD (io2).
AWS Key Management Service (KMS) is a managed service that creates and controls the encryption keys used to protect data at rest across AWS services.
VPC Flow Logs capture information about IP traffic going to and from network interfaces in a VPC.
A security group is a stateful virtual firewall that controls inbound and outbound traffic for AWS resources such as EC2 instances.
Amazon Route 53 is a scalable DNS and domain service that also provides health checks and routing policies such as latency, weighted, and failover.