You Are Migrating a Legacy Client-Server Application to AWS

question 152

Multiple Choice

You are migrating a legacy client-server application to AWS. The application responds to a specific DNS domain (e.g. www.example.com) and has a 2-tier architecture, with multiple application servers and a database server. Remote clients use TCP to connect to the application servers. The application servers need to know the IP address of the clients in order to function properly and are currently taking that information from the TCP socket. A Multi-AZ RDS MySQL instance will be used for the database. During the migration you can change the application code, but you have to file a change request. How would you implement the architecture on AWS in order to maximize scalability and high availability?

• A) File a change request to implement Alias Resource support in the application. Use Route 53 Alias Resource Record to distribute load on two application servers in different Azs.
• B) File a change request to implement Latency Based Routing support in the application. Use Route 53 with Latency Based Routing enabled to distribute load on two application servers in different Azs.
• C) File a change request to implement Cross-Zone support in the application. Use an ELB with a TCP Listener and Cross-Zone Load Balancing enabled, two application servers in different AZs.
• D) File a change request to implement Proxy Protocol support in the application. Use an ELB with a TCP Listener and Proxy Protocol enabled to distribute load on two application servers in different Azs.

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Definitions:

Deontological Theory

A moral philosophy that evaluates the ethics of an action based on the action's adherence to rules or duties, regardless of the outcome.

Ethical Conduct

Behaviors and practices that comply with moral principles and professional standards, often guiding individuals and businesses in acting with integrity and fairness.

Self-Interest

Self-Interest describes actions or decisions motivated by personal gain, often without regard for others.

Moral Result

The outcome or impact of an action or decision judged according to ethical principles and moral values.