Routing

Question 1

What is Route53?

Answer 1

A managed DNS containing a collection of rules and records which help clients reach a server through URLs.

• can use public or private domains
• has load balancing through DNS
• comes with limited health checks
• multiple routing policy options
• pay $0.50 per month per hosted zone

Question 2

What are the most common records of a Route53?

Answer 2

A: hostname to IPv4
AAAA: hostname to IPv6
CNAME: hostname to hostname (only for non root domain)
Alias: hostname to AWS resource

Question 3

What are the Route53 policy type?

Answer 3

• Simple (single target routing, no health checks)
• Health Check (routing by health check results)
• Failover (health check mandatory)
• Geolocation (routing by location)
• Latency (least latency routing to Region)
• Weighted (controls % of request routed to an endpoint, can include health checks)
• Multi-value (routing to multiple resources, not a substitute for ELB)

Question 4

What is TTL?

Answer 4

Time to Live mandatory setting on Route53

• High TTL = 24hrs (potentially outdated route)
• Low TTL = 60s

Question 5

Can Route53 register a domain for you?

Answer 5

Yes. However if you use a 3rd Party registrar like GoDaddy, GoogleDomains, etc. you must create a hosted zone in Route53 and update the NS Record at registrars website to use the Route53 name.

Question 6

What is Elastic Beanstalk?

Answer 6

An AWS managed service that provides a developer centric view of deploying an application on AWS.

• uses EC2, ASG, ELB, RDS etc all in one view that’s easy to read
• allows us to have full control over the configuration
• free except for underlying instances

Question 7

What are the architecture models for Elastic Beanstalk?

Answer 7

• Single Instance deployment
• Load Balanced with ASG
• ASG only

Question 8

What are the components of Elastic Beanstalk?

Answer 8

• Application
• Application version
• Environment name

Question 9

What is a domain name registrar?

Answer 9

An organization that manages the reservation of Internet domain names (i.e. GoDaddy, Google Domains, etc.)

Question 10

What is stickiness?

Answer 10

Attaching a user to a particular instance.

Question 11

What are some of the platforms that Elastic Beanstalk supports?

Answer 11

• Go
• Java SE
• Java with Tomcat
• .NET on Windows with IIS
• Node.js
• PHP
• Python
• Ruby
• Packer Builder
• Docker Containers (single, multi, preconfigured, or custom)