Route 53

Question 1

What is simple routing policy?

Answer 1

Here multiple ip addresses are returned from AWS for a single domain name

Question 2

What is weighted routing ?

Answer 2

Its a way of configuring Route 53 where a certain percentage of the request sent to an area based on configuration

Question 3

What is Latency based routing?

Answer 3

Route 53 selects a destination based on the lowest latency for the user

Question 4

What are the four entries in the Name Server ?

Answer 4

It lists the four name servers that are the authoritative name servers for your hosted zone.

Question 5

What is SOA?

Answer 5

The start of authority (SOA) record identifies the base DNS information about the domain, for example:

It a collection of information about the domain like
The Route 53 name server that created the SOA record
The email address of the administrator
A refresh time in seconds that secondary DNS servers wait before querying the primary DNS server’s SOA record to check for changes. In the example, this value is 7200.
The minimum time to live (TTL)

etc

Question 6

What is Failover routing strategy?

Answer 6

Here we have an active and a passive setup.

When the active site goes down the request automatically goes to the passive setup.

Question 7

What is geolocation based routing?

Answer 7

Users are routed to instances based on the geolocation the queries originated from, this is different to latency based routing

Question 8

What are Hosted Zones?

Answer 8

A hosted zone is a container for records, and records contain information about how you want to route traffic for a specific domain, such as example.com, and its subdomains.

Question 9

What do virtual nameservers do

Answer 9

They answer queries for a Domain

Question 10

What is authoritative DNS

Answer 10

An authoritative DNS system provides an update mechanism that developers use to manage their public DNS names

Question 11

What is the detault TTL for a record type in Route 53

Answer 11

There is not default TTL set for any record in Route 53

Question 12

Examples of some services Route 53 can connect to?

Answer 12

ELB load balancers, CloudFront distributions, or S3 website buckets.

Question 13

What is the use of Alias record?

Answer 13

lets you map your zone apex (example.com) DNS name to the DNS name for your ELB load balancer (such as my-loadbalancer-1234567890.us-west-2.elb.amazonaws.com).

Question 14

What is a delegation set in AWS ?

Answer 14

When a domain is registered with AWS, it is automatically associated with four name servers and this collection is called delegation set.

Question 15

Difference between Authoritative DNS and Recursive DNS Servers?

Answer 15

Authoritative DNS contains the final answer to a DNS query, generally an IP address, Clients dont directly talk to Authoritative DNS.
Clients talk to Recursive DNS servers, which identifies the Authoritative DNS server and forwards the query.

Question 16

What are the types of Hosted Zone?

Answer 16

Public hosted zones contain records that specify how you want to route traffic on the internet.

Private hosted zones contain records that specify how you want to route traffic in an Amazon VPC.