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A Cloud Guru - AWS > Route 53 > Flashcards

Route 53 Flashcards

1
Q

How we got Route 53 name?

A

DNS port is 53; Due to which we got the name Route 53

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2
Q

What is Route 53?

A

Route 53 is DNS service for AWS.

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3
Q

What is DNS?

A

DNS is used to convert human readable domain names into IP addresses.

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4
Q

What is IPv4?

A

32 bit network address

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5
Q

What is IPv6?

A

128 bit network address

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6
Q

What is top level domain?

A

Last word in domain name is top level domain.

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7
Q

What is second level domain?

A

second word from last in domain name is second level domain.

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8
Q

What is top level domain for “.com”?

A

.COM is top level domain

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9
Q

What is top & second level domain for “.co.uk”?

A

.UK is top level domain

.CO is second level domain

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10
Q

Top level domain names are controlled by which authority?

A

IANA - Internet Assigned Number Authority

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11
Q

What enforces uniqueness of domain names?

A

ICANN

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12
Q

In which database all DNS must be register?

A

WhoIS database

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13
Q

Popular domain register?

A

Amazon, go-daddy etc.

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14
Q

What is SOA?

A

Start of Authority record.

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15
Q

What SOA stores?

A 
Every DNS hold SOA records which stores data regarding:
Name of server that supply data
admin for zone
current version file
TTL value
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16
Q

What is NS record?

A

Name Server Record is used by top level domain servers to direct traffic to the content DNS server which holds SOA record.

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17
Q

How DNS is resolved?

A

(Web browser) acloudguru.com -> (Top level domain ).com -> ( domain register ) NS record -> SOA -> IP

18
Q

What is A Record?

A

Its contain IP details for DNS.

19
Q

What is TTL?

A

The time length that DNS is cached on server or at client machine.

20
Q

What is CNAME?

A

Canonical Name is used to resolve one domain name to another. Google.com to m.google.com

21
Q

What is Alias records?

A

“Map resources to Elastic Load balancer, CloudFront or S3.

alias record is similar to CNAME. One DNS to another DNS.

22
Q

Do we get IPv4 for elastic load balancer?

23
Q

DNS Types?

A 
SOA Record, 
NS Record,
A Record,
CNAMES,
MX Records,
PTR Records.
24
Q

DNS registration time?

A

Max 3 days

25
Q

What is Simple Routing?

A

In simple routing we can map multiple IP address to a domain. & Simple routing will redirect us to any of the IP address in random.

26
Q

What is Weighted Routing?

A

In Weighted routing we can map multiple IP address to a domain. & Weighted routing will split the traffic based on the different weights assigned to each IP address.

27
Q

What is Latency Based Routing?

A

In Latency Based routing we can map multiple IP address to a domain. & Latency routing will redirect us to lowest latency IP address.

28
Q

What is Failover Routing?

A

In Failover routing we can map multiple IP address to a domain as primary & secondary. & failover routing will redirect to primary or secondary IP address based on Web server health/availability.

29
Q

What is Geolocation Routing?

A

In Geolocation routing we can map multiple IP address to a domain. & Geolocation routing will redirect us to nearest IP address.

30
Q

What is Geoproximity Routing?

A

In Geoproximity routing we can map multiple IP address to a domain. & Geoproximity routing will redirect us to any of the IP address based on routing flow.

31
Q

What is Multivalued Routing?

A

In Multivalued routing we can map multiple IP address to a domain. & Multivaluerouting will redirect us to any of the IP address in random with health check associated.

32
Q

Do we have health check involved in Simple routing?

33
Q

Which routing is suitable for DR scenario?

A

Failover routing

34
Q

Which routing is suitable for Country based scenario?

A

Geolocation Routing

35
Q

when we stop server & start do we get different IP for server?

36
Q

How to prevent IP address change for web server?

A

Dedicated IP or using elastic load balancer

37
Q

You have an enterprise solution where CTO asked you to redirect all of Asia traffic to India; which routing will help with this scenario?

A

Geolocation Routing & geoproximity routing.

38
Q

If UK users are seeing different sites than that of US customers what routing might be in use?

A

Geolocation Routing & geoproximity routing.

39
Q

You created subdomain for popular websites, you need subdomain point to ELB using route 53; which DNS record set can be used?

A

CNAME & Alias

40
Q

Your company has 8 web servers & network traffic should be served based on resilience which routing can be used?

A

Multivalued routing

41
Q

Is there is limit for no of domain names that you can manage in AWS?

A

Yes limit is 20 but it can be extended by AWS.

42
Q

Which routing will redirect to different server if health check is not good?

A

Failover routing & latency based routing

A Cloud Guru - AWS (11 decks)

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