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AWS Certified Solution Architecture -- Associate > Route 53 > Flashcards

Flashcards in Route 53 Deck (11)
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1
Q

For a DNS record to use an S3 bucket as an endpoint

A

the bucket name must be the same as the domain name.

2
Q

CloudFront

A

is a global CDN which delivers content from an “origin” location(the source of the content) to an “edge” location(AWS CDN data center).

3
Q

EDGE LOCATION

A

is an AWS datacenter which does not contain AWS services.
instead, it is used to deliver content to parts of the world.
allows the caching of static objects from the origin location.

4
Q

Origin

A

an origin can be as S3 bucket, Elastic Load Balancer that distributes requests among origin EC2 instances.

5
Q

CloudFront can integrate with Route 53 for “alternate” CNAMES.

A

This allows you to create a URL such as … that works with your distribution.

6
Q

CloudFront benefit

A
    • User experience lower latency and content load time.

- - Reduces load on your applications resources(origin services) – thus reducing cost.

7
Q

Updating Cached Files

A
  • Caching is done based off the object name.
    • in order to serve a new version of an object, either create a new object with a new name or create an “invalidation” on the CloundFront distribution based off the object name.
  • -“invalidations” have a cost, so if you have to invalidate a large CloudFront distribution then perhaps you should just create a new distribution and move DNS name.
  • Cached objects can also be set with a specific expiration time/date, or set to not cache at all.
8
Q

Signed URLs

A

Signed URLs allow access to “private content” by creating a temporary, one-time-use URL based off of the number of seconds you want it to be accessible.
– Signed with a X.506 certificate.

9
Q

CloudFront performance can be affected by

A
  • File size and type of file.
  • Having to remake the request from the edge location to the origin.
    • downloading the object from the origin takes time.
    • as well as writing it to cache and responding to the end user request.
    • the more request that have to go to the origin, the higher the load is on your source, which can also cause latency and load performance issues.
  • slow DNS issues can cause performance issues. because the end location that the user’s request goes to is dependent upon a “DNS check” to determine the closest EDGE location.
  • query string reduce cahce “hits” because it is often unique and also requires extra “work” in order ot forward to the origin location.
10
Q

CloudFront performance can be increased by

A

Longer cache periods increases performance.

11
Q

If you want to point a domain name to an AWS elastic load balancer in Route 53, how would you need to configure the record set?

A

Alias with a type “A” record set.You will need to configure the record set as a type “A” alias. An alias allows you to point the domain to an AWS-specific endpoint, such as an ELB, Cloudfront distribution, or S3 bucket (as opposed to just an IPv4 IP address).