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Route 53 Flashcards

(41 cards)

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1
Q

What is Route 53?

A

is a managed highly available and scalable cloud Domain Name System (DNS) web service

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2
Q

Which are the most common records in AWS Route 53?

A
  • A
  • AAAA
  • CNAME
  • Alias
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3
Q

What is A Route 53 record?

A

hostname to IPv4

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4
Q

What is AAAA Route 53 record?

A

hostname to IPv6

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5
Q

What is CNAME Route 53 record?

A

hostname to hostname

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6
Q

What is Alias Route 53 record?

A

hostname to AWS resource

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7
Q

What domains can Route53 use?

A
  • public domain names you own (or buy) application1.mypublicdomain.com
  • private domain names that can be resolved by your instances in your VPCs. application1.company.internal
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8
Q

What are the main features of Route53?

A
  • Load balancing
  • Health checks
  • Routing policy
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9
Q

How does Load Balancing work in Route53?

A

through DNS – also called client load balancing

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10
Q

How are Health Checks in Route53?

A

limited

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11
Q

What are the Routing Policies in Route53?

A
  • simple
  • failover
  • geolocation
  • latency
  • weighted
  • multi value
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12
Q

What is mandatory for each Route53 record?

A

TTL (Time to Live)

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13
Q

What is the impact of TTL on Route53?

A

impacts on traffic and the expiration of records (outdated or not)

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14
Q

What are the 2 main features that has Alias that CNAME does not have?

A
  • works for root domain as well

- includes Native health check

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15
Q

What is Route53 Simple Routing Policy?

A

Maps a hostname to another hostname

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16
Q

When to use Route53 Simple Routing Policy?

A

Use when you need to redirect to a single resource

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17
Q

How does work Route53 Simple Routing Policy health checks?

Study These Flashcards
A

You can’t attach health checks to simple routing policy

18
Q

What if multiple values are returned in a Route53 Simple Routing Policy?

Study These Flashcards
A

a random one is chosen by the client

19
Q

What is Route53 Weighted Routing Policy?

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A

Control the % of the requests that go to specific endpoint

20
Q

What is helpful for Route53 Weighted Routing Policy?

Study These Flashcards
A

Helpful to test 1% of traffic on new app version for example and to split traffic between 2 regions

21
Q

Can Route53 Weighted Routing Policy be associated with health checks?

22
Q

What is Route53 Latency Routing Policy?

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A

Redirect to the server that has the least latency close to us

23
Q

When is helpful to use Route53 Latency Routing Policy?

Study These Flashcards
A

Super helpful when latency of users is a priority

24
Q

What is default number of health checks required for Route53 to determine the state?

25
What is Default Health Check Interval for Route53?
30s can be set to 10s at a higher cost
26
How many health checks are performed by Route53 the first time?
15, 1 request every 2 seconds on average
27
What kind of health checks perform Route53?
Can have HTTP, TCP and HTTPS health checks (no SSL verification)
28
What is possible to integrate to health checks in Route53?
CloudWatch
29
To what is possible to link health checks to in Route53?
To DNS queries
30
What is Route53 Failover Routing Policy?
lets you route traffic to a resource when the resource is healthy or to a different resource when the first resource is unhealthy
31
What is Route53 Geo Location Routing Policy?
Use when you want to route traffic based on the location of your users
32
What should you do when you use Route53 Geo Location Routing Policy?
create a "default" policy in case there is no match on location
33
What is Multi Value Geo Location Routing Policy?
Use when routing traffic to multiple resources and want to associate a Route 53 health checks with records
34
What is similar to a Multi Value Geo Location Routing Policy
to an ELB but is not a substitute
35
What is a Registrar?
A domain name registrar is an organization that manages the reservation of Internet domain names like GoDaddy, Google Domains, ROUTE53, etc...
36
What is not a Registrar?
a DNS (But each domain registrar usually comes with some DNS features)
37
What is 3rd party Registrar in AWS Route 53?
If you buy your domain on 3rd party website, you can still use Route53.
38
What do you need to create on Route53 for 3rd party registrar?
Need to create a hosted zone
39
What do you need to do on a 3rd party registrar to use Route53 name servers?
Update NS Records on 3rd party website
40
What means having a High Route 53 DNS Records TTL?
* Less traffic on DNS | * Possibly outdated records
41
What means having a Low Route 53 DNS Records TTL?
* More traffic on DNS * Records are outdated for less time * Easy to change records

DVA (61 decks)

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