DNS, Caching, and Performance Optimization

Question 1

CNAME Record is used to reference ________ versions of a site like the _____ version

Answer 1

CNAME Record is used to reference alternate versions of a site like the mobile version

exp m.broward.com

Question 2

What is the difference between an Alias and CNAME record?

Alias records are ________ to AWS. They translate your naked _______ name to an AWS ________.

Answer 2

Alias records are exclusive to AWS. They translate your naked domain name to an AWS resource.

Question 3

Start of Authority Record (SOA) stores important information about a domain or zone, such as (3)

Email of the ___________
When the domain was last _______
How long the ______ should wait between ________

Answer 3

Start of Authority Record (SOA) stores important information about a domain or zone, such as (3)

Email of the administrator
When the domain was last updated
How long the server should wait between refreshes.

Question 4

An A record indicates the __ ________ of a given domain

Answer 4

An A record indicates the IP address of a given domain

Question 5

Simple Routing allows you to have ___ record with _______ IP addresses associated with it

Answer 5

Simple Routing allows you to have one record with multiple IP addresses associated with it

Question 6

Weighted Routing lets you associate multiple ________ with a single ________ name and then allows you to choose how much traffic is ________ to each resource

Answer 6

Weighted Routing lets you associate multiple resources with a single domain name and then allows you to choose how much traffic is routed to each resource

Question 7

Latency-Based ________ decisions are decided based on the lowest _______ possible

Answer 7

Latency-Based Routing decisions are decided based on the lowest latency possible

Question 8

Failover Routing is ideal for a scenario where your application has an ______ and ________ route, and if a path fails a health check the ________ route will become ______

Answer 8

Failover Routing is ideal for a scenario where your application has an active and passive route, and if a path fails a health check the passive route will become active

Question 9

Geolocation Routing lets you choose the resources that serve your traffic based on the __________ location of your _____

Answer 9

Geolocation Routing lets you choose the resources that serve your traffic based on the geographic location of your users

Question 10

Multivalue Answer Routing lets you use Route 53 to respond to DNS queries with up to _____ healthy records selected at _______.

Answer 10

Multivalue Answer Routing lets you use Route 53 to respond to DNS queries with up to eight healthy records selected at random.

Question 11

Using route 53, you can set health checks on _________ record sets

Answer 11

Using route 53, you can set health checks on individual record sets

Question 12

A Network Load Balancer would be ideal if you wanted to achieve very ___ _______ and need a _____ IP address

Answer 12

A Network Load Balancer would be ideal if you wanted to achieve very low latency and need a Static IP address

Question 13

What happens if a record fails a health check?

Answer 13

It will be removed from Route 53 until it passes the health check

Question 14

Simple routing will route traffic to a single record with _______ values

Answer 14

Simple routing will route traffic to a single record with multiple values

Question 15

Simple routing policies do not work with

Answer 15

health checks

Question 16

Weighted routing can be useful for ____ _________ and ________ new software versions.

Answer 16

Weighted routing can be useful for load balancing and testing new software versions.

Question 17

Multivalue Answer Routing lets you distribute DNS responses across _______ resources

Answer 17

Multivalue Answer Routing lets you distribute DNS responses across multiple resources

Question 18

When using Multivalue Answer Routing if a web server becomes unavailable a client can try up to _____ other IP addresses from the response to avoid ________

Answer 18

When using Multivalue Answer Routing if a web server becomes unavailable a client can try up to eight other IP addresses from the response to avoid downtime.

Question 19

To use ____________ routing, you must be using Route53 ______ Flow

Answer 19

To use GeoProximity routing, you must be using Route53 Traffic Flow

Question 20

GeoProximity Routing lets you choose to route ____ or ____ traffic to given resources by specifying a value, known as a ____.

Answer 20

GeoProximity Routing let you choose to route more or less traffic to given resources by specifying a value, known as a bias.

Question 21

A bias ______ or ______ the size of a geographic region from which traffic is routed to a resource.

Answer 21

A bias expands or shrinks the size of a geographic region from which traffic is routed to a resource.

Question 22

Time to live (TTL) controls how long a ____ record will be ______

Answer 22

Time to live (TTL) controls how long a DNS record will be cached.

Question 23

Route 53 offers the following functions (3)

• *___** resolution
• *_____ ____** resolution
• *_____** Check of resources

Answer 23

• *DNS** resolution
• *Domain** name resolution
• *Health** Check of resources

Question 24

Which is better between an Alias record and CNAME?

Answer 24

Alias Record

Question 25

A Network load balancer would be best if you wanted to use _____ and ____-based applications.

Answer 25

A Network load balancer would be best if you wanted to use TCP and UDP based applications.

Question 26

Which load balancer works best with VPC endpoint services?

Answer 26

Network Load Balancer ELB