AWS Global Accelerator

A global networking service that provides static anycast IP addresses as fixed entry points and routes user traffic over the AWS global network to optimal regional endpoints. It operates by creating accelerators with listeners and endpoint groups that perform health checks and steer traffic to healthy endpoints. It fits in front of regional application endpoints (for example, load balancers or EC2 instances) to provide global traffic orchestration and predictable entry IP addresses.

🗂 Resource Category

Networking and Content Delivery

🧠 Exam Memory Hook

Think: "Global static IPs + edge traffic steering + cross-region failover = AWS Global Accelerator"

📖 Ownership

Classification: AWS Managed Service

AWS responsibilities: AWS operates and maintains the Global Accelerator control plane, the anycast IP addressing, the edge network routing, and the underlying AWS network infrastructure that carries accelerated traffic; AWS is responsible for availability and patching of the AWS-owned service platform and physical network infrastructure. AWS also manages the platform components of other AWS managed endpoint services (for example, Elastic Load Balancing) when those are used as endpoints. AWS provides integration points for monitoring and logging.

Customer responsibilities: The customer configures accelerators, listeners, endpoint groups, traffic dials, and health check settings; the customer deploys, configures, and secures the backend endpoints (for example, NLB/ALB/EC2 instances) and the VPC network, security groups, and IAM permissions that control access to those endpoints. The customer is responsible for application code, operating systems on EC2 endpoints, container images, dependencies, and any firewall or allowlist rules that rely on the accelerator IP addresses; the customer also configures monitoring alarms and incident response.

Patching responsibilities: AWS patches and maintains the Global Accelerator service platform and the AWS physical infrastructure that supports it. The customer patches guest operating systems, application runtimes, libraries, and dependencies on customer-managed endpoints such as Amazon EC2. When endpoints are AWS-managed services (for example Elastic Load Balancing), AWS manages and patches those service platforms according to their own models; customers remain responsible for configuration and application-level patching.

🏗 Typical Architecture

💡 Top 5 Features

Provides global static anycast IP addresses as fixed entry points for applications.
Routes traffic to healthy regional endpoint groups using configurable health checks and endpoint weights.
Supports Standard and Custom Routing accelerator types for different traffic patterns and routing granularity.
Offers per-endpoint-group traffic dials to control traffic distribution for rollouts and failover.
Publishes operational metrics and logs that can be consumed by Amazon CloudWatch.

✅ Top 5 Use Cases

Provide fixed entry IP addresses for global applications to simplify firewall allowlists and DNS records.
Implement cross-region failover by routing traffic to healthy regions when regional endpoints are unhealthy.
Direct UDP or TCP traffic to specific application servers using Custom Routing for gaming or IoT workloads.
Reduce variability in public internet routing by steering users over the AWS global network to regional endpoints.
Shift traffic gradually between regions or during deployments using traffic dials on endpoint groups.

🏗 Architecture Placement

AWS Global Accelerator is an edge/global traffic orchestration service that sits between clients and regional application endpoints; clients send requests to the accelerator's static anycast IPs (optionally referenced by DNS), and the accelerator directs traffic to endpoint groups in one or more AWS Regions. It connects to regional endpoints such as Network Load Balancers, Application Load Balancers, Elastic IPs, or EC2 instances in VPCs and integrates with monitoring tools for observability. Depending on configuration it can be used for both internet-facing and customer-managed traffic patterns.

🎯 Commonly Used With

- Amazon CloudWatch
- Elastic Load Balancing
- Amazon EC2
- Amazon Route 53
- Amazon VPC

🌍 5 Real-World Examples

A banking application exposes two regional deployments and uses Global Accelerator to provide fixed IPs for partner allowlists and to fail over traffic to a healthy region during an outage.
A game developer uses Custom Routing accelerators to direct UDP game traffic from players to specific regional game servers for predictable routing.
A media streaming service points DNS to Global Accelerator static IPs so playback requests are routed to the nearest healthy regional origin behind load balancers.
A telecommunications signaling service uses Global Accelerator to provide consistent public IP addresses for peering partners while steering traffic to multiple regions for resilience.
A healthcare SaaS vendor uses traffic dials to gradually shift production traffic to a new region while monitoring application health and metrics.

🎓 AWS Exam Clues

Choose when you need global static anycast IP addresses as fixed entry points that map to regional endpoints.
Consider Global Accelerator for cross-region failover and global traffic steering, not for content caching or edge compute.
Select Custom Routing accelerators when you need to route UDP/TCP flows directly to specific application servers in VPCs.
Use traffic dials and endpoint weights to control distribution during deployments or regional migration scenarios.
Remember the service is global/edge-based and will route over the AWS global network to regional endpoints configured in endpoint groups.

📝 Quick Revision

AWS Global Accelerator provides global static anycast IPs and routes client traffic over the AWS global network to configured regional endpoints. Use it for predictable entry points, cross-region failover, and traffic steering; ensure you configure endpoint health checks, security controls, and monitor endpoints because application patching and endpoint maintenance remain the customer's responsibility.

🏷 Keywords

anycast • static IP • endpoint group • traffic dial • health check • Standard accelerator • Custom Routing • global network • regional endpoints • cross-region failover • traffic steering • client IP preservation