Route 53 with ELB integration in AWS - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is Amazon Route 53?

Amazon Route 53 is a cloud service that helps direct internet traffic to your websites by translating domain names into IP addresses.

beginner

What does ELB stand for and what is its role?

ELB stands for Elastic Load Balancer. It automatically distributes incoming traffic across multiple servers to keep your application reliable and fast.

intermediate

How does Route 53 integrate with ELB?

Route 53 can point your domain name to an ELB by creating an alias record. This lets Route 53 send traffic directly to the load balancer without needing an IP address.

intermediate

Why use an alias record in Route 53 for ELB instead of a CNAME?

Alias records are free and can point to AWS resources like ELB directly at the root domain, unlike CNAMEs which can't be used at the root and may incur extra costs.

intermediate

What happens if the ELB changes its IP addresses?

Because Route 53 uses alias records pointing to the ELB's DNS name, it automatically tracks IP changes. This means your domain always routes correctly without manual updates.

What type of Route 53 record should you use to point your domain to an ELB?

A Alias record

B CNAME record

C TXT record

D MX record

Alias records are designed to point to AWS resources like ELB and work at the root domain level.

Why is using an alias record with ELB beneficial?

A It costs extra money

B It requires manual IP updates

C It automatically updates if ELB IPs change

D It only works with IPv6

Alias records track ELB DNS names, so IP changes are handled automatically.

Which AWS service distributes traffic across multiple servers?

A CloudWatch

B S3

C Route 53

D Elastic Load Balancer

Elastic Load Balancer distributes incoming traffic to multiple servers.

Can you use a CNAME record at the root domain to point to an ELB?

A Yes, always

B No, CNAMEs are not allowed at root domains

C Only for IPv6

D Only with alias records

DNS rules prevent CNAME records at the root domain; alias records solve this.

What does Route 53 do when it receives a request for your domain?

A Translates domain to IP and sends traffic to ELB

B Stores website files

C Monitors server health

D Creates new servers

Route 53 translates domain names to IP addresses or AWS resources like ELB.

Explain how Route 53 and ELB work together to route internet traffic to your application.

Think about how your website address connects to your servers through AWS.

Describe the benefits of using alias records in Route 53 when integrating with ELB.

Consider why alias records are preferred over CNAME for ELB.