In today’s world, businesses rely heavily on web applications to interact with their customers and drive revenue. As a result, deploying a high-available, reliable, secure, and scalable architecture has become essential.
What is a 3 Tier Web Application Architecture?
A 3 tier web application architecture is a client-server architecture that divides the application into three tiers or layers. These three tiers are presentation, application, and database.
1.Presentation tier handles the user interface.
2. Application tier handles the business logic and processing.
3. Database tier handles data storage and retrieval.
The architecture includes several key AWS components to ensure high availability, reliability, scalability, and security. These components include:
- Multi-Availability Zone (AZ) deployment: replicating the application across different availability zones to ensure high availability and fault tolerance.
- Auto Scaling: automatically increasing or decreasing the number of instances to handle changes in traffic volume.
- NAT Gateway: providing a managed network address translation (NAT) service to enable instances in private subnets to access the internet or other AWS services while keeping them isolated from the public internet.
- AWS WAF (Web Application Firewall): a managed service that provides an additional layer of protection for web applications by filtering and monitoring HTTP requests to protect against common web exploits and attacks.
- Security Groups: controlling inbound and outbound traffic to EC2 instances.
- Network ACLs: filtering traffic at the subnet level to add an extra layer of security.
- Elastic Load Balancing (ELB): distributing incoming traffic across multiple instances to improve availability and scalability.
- Cloud Front: a content delivery network (CDN) service that caches and distributes static and dynamic content to edge locations around the world, reducing latency and improving performance for end-users.
Check how you can deploy this architecture using AWS management console
