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okay, let's dive into deploying a two-tier architecture application on aws using various services. this tutorial will cover a common setup: a web server tier and a database tier. we'll use practical examples and explanations for each step.

*day 9: deploying a two-tier architecture application on aws*

*overview*

a two-tier architecture separates an application into a presentation (web server) tier and a data (database) tier. the web server handles user requests, processing logic, and displaying results. the database tier stores and manages persistent data. this design promotes scalability, maintainability, and security compared to monolithic applications.

*technologies we'll use*

*aws ec2:* elastic compute cloud - virtual servers for hosting our web server application.
*aws rds:* relational database service - managed database service for hosting our database. we'll use mysql.
*aws vpc:* virtual private cloud - isolated network within aws to provide security and isolation.
*aws security groups:* firewall rules to control network traffic to our ec2 instances and rds instance.
*aws iam:* identity and access management - to manage permissions and access to aws resources.
*aws elastic load balancer (elb):* distributes traffic across multiple ec2 instances for high availability and scalability. (optional, but highly recommended for production).
*ssh:* secure shell – connecting to ec2 instances to configure and manage them.
*git:* version control system (optional, but highly recommended).

*prerequisites*

1. *aws account:* sign up for an aws account if you don't already have one. make sure you understand the aws free tier limitations to avoid unexpected charges.
2. *aws cli (optional):* the aws command line interface can be useful for automating tasks. install and configure it if you prefer using the cli over the aws management console.
3. *ssh client:* for connecting to ec2 instances (e.g., put ...

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