Route53

Question 1

What AWS resources can route 53 Alias records map to?

Answer 1

ELBs
CloudFront
S3 buckets
Elastic Beanstalk

Question 2

Explain the Weighted Routing Policy

Answer 2

Policy which can split traffic based on assigned weights, such as 80% here and 20% there. Two Alias records are created for the zone with their espective weights entered

Question 3

Explain the Geolocation Routing Policy

Answer 3

Policy which routes traffic based on the geographic location of the user

Question 4

What is a top-level domain?

Answer 4

That is the name given to the rightmost portion of a domain name, such as .com, .net, or .edu

Question 5

When developing a new version of a website, the customer wants 20% of traffic to be diverted to the new site and 80% to the old site? How is this accomplished?

Answer 5

Create two Alias records in the Route53 hosted zone, and use Weighted Routing Policy, setting one to 20 and the other to 80

Question 6

True or false: route53 is a global, not regional service

Answer 6

True

Question 7

Explain the Latency based Routing Policy

Answer 7

Policy which routes traffic based on the lowest network latency for the end user

Question 8

What is an A record?

Answer 8

Record which stores the IPv4 address for a domain

Question 9

What is a CNAME record?

Answer 9

A record which is used to resolve one domain name to another. Instead of having two A records, the CNAME does the translation

Question 10

What is an AAAA record?

Answer 10

Record which stores the IPv6 address for a domain

Question 11

What is a domain registrar?

Answer 11

An authority that can assign domain names directly under one or more top-level domains

Question 12

Does Route 53 support wildcard entries?

Answer 12

Yes. A record can be set up for *.website.com, for example

Question 13

Can you use an A record to resolve to an ELB?

Answer 13

No. ELB’s only provide you with DNS names, not IP addresses

Question 14

What are the DNS server names for Route 53?

Answer 14

Each Amazon Route 53 hosted zone is served by its own set of virtual DNS servers. The DNS server names for each hosted zone are thus assigned by the system when that hosted zone is created.

Question 15

Explain the Simple Routing Policy

Answer 15

Default routing policy. Used most commonly when you have a single resource that performs a function for the domain, such as a single web server

Question 16

What are the five route 53 routing policies?

Answer 16

Simple
Weighted
Latency
Failover
Geolocation

Question 17

True or False: It is possible to create multiple hosted zones for the same domain name

Answer 17

True

Question 18

Does Route 53 provide query logging capability?

Answer 18

Yes. When you configure query logging, Route 53 starts to send logs to CloudWatch Logs.

Question 19

What is the difference between a CNAME and Alias record?

Answer 19

Alias records are AWS-specific and used in instances where IP addresses can change. Use of CNAME records in AWS incurs a charge , while Alias records are free and are preferred

Question 20

What is an SOA record?

Answer 20

It is the Start of Authority record, which contains information about:administrator of the zone, curreent version of the data file, TTL info

Question 21

What is an NS record?

Answer 21

Name Server records: indicates the name servers for the zone

Question 22

True or false: Alias records can be created for the zone apex

Answer 22

True. This is not possible for CNAME records

Question 23

Explain the Failover Routing Policy

Answer 23

Policy with a primary and secondary record. If the primary fails a health check, traffic is routed to the secondary record

Question 24

What is an Alias record?

Answer 24

Similar to a CNAME record in that it translates one domain name to another, but it works on AWS resources and automatically recognized changes in record sets that is referred to. Most commonly used with ELBs whose underlying IP address is subject to constant change

Question 25

What records are created automatically when you first create a hosted zone?

Answer 25

NS

SOA