Route 53

Question 1

Which of the following is the correct use case for Route 53? (1)

Conduct health checks on AWS resources

Deploy your code as infrastructure to run your application

Route traffic to AWS resources

Provide a PEM key to SSH into an AWS service

Answer 1

Route traffic to AWS resources

Question 2

In Route 53, What does an alias do?

ˈeɪliəs

Answer 2

Points our records to the correct IP endpoint

ˈeɪliəs

Route 53 alias records are mapped internally to the DNS name of alias targets such as AWS resources. Route 53 monitors the IP address associated with an alias target’s DNS name for scaling actions and software updates. The authoritative response from Route 53 name servers contains an A record (for IPv4 addresses) or AAAA record (for IPv6 addresses) with the IP address of the alias target.

Question 3

The AWS specific DNS record type?

Answer 3

Alias

Alias records are smart where they can detect the change of an IP address and continuously keep that endpoint pointed to the correct resource.

In most cases you want to be using Alias when routing traffic to AWS resources

Question 4

Failover routing policy does what?

Answer 4

Routes traffic based on endpoint health conditions?

Question 5

Weighted routing policy does what?

Routes traffic based on incoming volume of traffic?

Routes traffic based on latency?

Routes traffic based on location?

Routes traffic based on endpoint health conditions?

Answer 5

Routes traffic based on incoming volume of traffic?

The default routing policy?

Question 6

The default routing policy?

Answer 6

Simple Routing Policy

Question 7

This routing policy directs traffic based on the users location

Answer 7

Geolocation Routing Policy

Question 8

This routing policy directs traffic based on the health check status of instances

Answer 8

Failover routing policy

Question 9

Simple Routing gives a specified IP address that the cloud engineer has to set?

ˈspɛsəˌfaɪd

Answer 9

False

Question 10

If you provide multiple IP values when using a simple routing policy, how is traffic routed?

Answer 10

Randomly

Question 11

If you assign a weight value of 50, how much traffic is sent to the resource?

Answer 11

50%

Question 12

Latency based routing is specific to availability zone?

Answer 12

False

It’s based on region

Question 13

Routing policy: Latency.
Latency Based Routing allows you to direct traffic based on the lowest network latency possible for your end-user based on region.

Where do you setup a Latency resource record? There are two places

Latency routing policy – Use when you have resources in multiple AWS Regions and you want to route traffic to the region that provides the best latency.

Answer 13

At the EC2 or at the ELB resource that hosts your application in each region.

This doesn’t imply the closest server all the time, just the server with the lowest latency.

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Question 14

You must create this kind of record for each EC2 or ELB hosting your application in each region

Answer 14

Latency Resource Record

ˈleɪtənsi) (ˈrisɔrs) (rəˈkɔrd

Question 15

When our web application goes offline how does Failover routing help?

Answer 15

Diverts traffic to a secondary resource

ˈsɛkənˌdɛri

Question 16

The number of locations that must be specified for a failover policy

Answer 16

2 - Primary & Secondary

Question 17

Geoproximity routing does what?

Answer 17

Routes traffic to the closest possible AWS resource within your infrastructure

Question 18

You must be using this in order to use a geoproximity routing policy

Answer 18

Route53 Traffic Flow

In the Route53 Traffic Flow you can select any regions and visualize the bias

Question 19

Amazon Route 53 > Routing policy

What is the main difference between Multi value and Simple policies?

Answer 19

Health Checks

Question 20

A Multi (ˈmʌlti) value policy will return a single IP address for a DNS query?

Answer 20

True

Question 21

The difference between multi-value answer policies and simple routing policies is the addition of this component

Answer 21

Health Checks

Question 22

The default interval for health checks

Answer 22

5s (min)
30s (Default)
300s (max)

Question 23

What is Route 53?

What are its 5 components?

Answer 23

• It’s a DNS provider
• Routing policies (Simple, Failover, Geolocation…)
• Traffic Flows
• AWS alias records
• Route 53 Resolvers (provides automatic DNS resolution within the VPC)
• Health Checks