Route 53 Flashcards
Translates the human friendly hostnames into the machine IP addresses
www.google.com => 172.217.18.36
DNS (Domain Name System)
A highly available, scalable, fully managed and Authoritative DNS
Route 53
What does Authoritative mean?
The customer (you) can update the DNS records
Maps a hostname to IPv4
What record type is this?
A
Maps a hostname to IPv6
What record type is this?
AAAA
Maps hostname to another hostname
What record type is this?
CNAME
Name servers for the Hosted Zone
What record type is this?
NS
A container for récords that define how to route traffic to a domain and its subdomain
Hosted Zone
Contains records that specify how to route traffic on the internet
Public Hosted Zones
Contains records that specify how you route traffic within one or more VPCs
Private Hosted Zones
How much does it cost per hosted zone?
$0.50 per month
- Typically, route traffic to a single resource
- Can specify multiple values in the same record
- If multiple values are returned, a random one is chosen by the client
What routing policy is this?
Simple
- Control the % of the requests that go to each specific resource
- DNS records must have the same name and type
- Can be associated with Health Checks
- Use cases: load balancing between regions, testing new applications versions
What routing policy is this?
Weighted
TTL is mandatory for each DNS record except what?
Alias records
High TTL means what?
Less traffic on Route 53
Low TTL means what?
More traffic on Route 53 ($$)
How much time it takes for your computer to send signals to a server and then receive a response back.
Latency
Create a CloudWatch Metric and associate a CloudWatch Alarm, then create a Health Check that checks alarm itself
Health check for a Private Hosted Zone
A backup operational mode in which the functions of a system component are assumed by a secondary component
Failover
A way of asking a service on a particular server whether or not it is capable of performing work successfully
Health Check
Use case: website localization, restrict content distribution, load balancing
What routing policy is this?
Geolocation
The ability to track a device’s whereabouts using GPS, cell phone towers, WiFi access points or a combination of these.
Geolocation
A (blank) expands or shrinks the size of the geographic region from which traffic is routed to a resource
Bias
Routes traffic to your resources based on the geographic location of your users and your resources.
What routing policy is this?
Geoproximity
Resources serve traffic based on the geographic location of your users, meaning the location that DNS queries originate from
What routing policy is this?
Geolocation
Works by mapping IP addresses to locations
What routing policy is this?
Geolocation
You need to shift traffic from one region to another, by increasing the bias
What routing policy should you use?
Geoproximity
• Simplify the process of creating and
maintaining records in large and
complex configurations
• Visual editor to manage complex
routing decision trees
What routing policy is this?
Traffic flow
Use when routing traffic to multiple resources
What routing policy is this?
Multi-Value
For people requesting your website through the internet, what should they use?
Public Hosted Zone
Where should NS records be updated?
3rd party Registar
What are valid Route 53 Health Checks?
Endpoint
Other Health Checks
CloudWatch Alarms
The Alias record can be added to the what?
Root domain
Which record type has a loss of geo-targeting data?
Alias Record
Each DNS record has a (blank) which orders clients for how long to cache these values and not overload the DNS Resolver with DNS requests.
TTL
