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AWS TSA 2022 > Route53 > Flashcards

Route53 Flashcards

1
Q

Out of https://api.www.example.com, what is the top level domain?

A

.com

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2
Q

Out of https://api.www.example.com, what is the second level domain?

A

example.com

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3
Q

Out of https://api.www.example.com, what is the sub domain?

A

www.example.com

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4
Q

Out of https://api.www.example.com, what is the domain name?

A

api.www.example.com

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5
Q

Out of https://api.www.example.com, what is the protocol?

A

https

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6
Q

What does Authoritative DNS mean?

A

It means the customer (you) can update DNS records

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7
Q

What does the A Record Type do?

A

It maps a hostname to an IPv4

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8
Q

What does a AAAA Record Type do?

A

It maps a hostname to an IPv6

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9
Q

What does a CNAME Record Type do?

A

It maps a hostname to another hostname

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10
Q

What are NS Record Types?

A

They are Name Servers for the Hosted Zone

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11
Q

Is a TTL required for all Records?

A

Everything except the Alias Record

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12
Q

What is an Alias Record Type?

A

It maps a hostname to an AWS resource

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13
Q

What are the 5 differences between Alias and CNAME?

A
  • CNAME maps a hostname to another hostname
  • Alias maps a hostname to an AWS resource
  • CNAME will not work for a non-root domain (something.mydomain.com)
  • Alias works for root and non-root domains
  • Alias is free of charge
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14
Q

What can you NOT set an Alias record for?

A

An EC2 DNS name

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15
Q

What are the 7 Routing Policies in AWS?

A
  • Simple
  • Weighted
  • Failover
  • Latency Based
  • Geolocation
  • Multi Value Answer
  • GeoProximity
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16
Q

How does the Simple Routing Policy work?

A
  • It routes traffic to a single resource.
  • If multiple values are returned, a random one is chosen.
  • Cannot be associated with Health Checks
17
Q

How does the Weighted Routing Policy work?

A
  • It allows you to assign a % of requests to each specific resource
  • Can be associated with Health Checks
18
Q

How does the Latency Routing Policy work?

A
  • It redirects traffic to the resource that has the least latency close to us
19
Q

How does the Failover Routing Policy work?

A
  • It uses the mandatory health check to check the resource is healthy.
  • If not, it fails over to the secondary resource
20
Q

How does the Geolocation Routing Policy work?

A
  • It routes based on the users location
21
Q

How does the Geoproximity Routing Policy work?

A
  • It routes based on the geographic location of the users and resources
  • You have the ability to shift more traffic to resources based on the defined bias
  • You must use the Route53 Traffic Flow
22
Q

How does the Multi Value Routing Policy work?

A
  • It routes traffic to multiple resources

- Not a replacement for an ELB but can be thought of as client side load balancing

AWS TSA 2022 (19 decks)

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