Section10: Route 53

Question 1

DNS Terminologies?

Answer 1

• Domain Registrar: Amazon Route 53,GoDaddy…..
• DNS Records:A,AAAA,CNAME,NS…..
• Zone File: contains DNS records
• Name Server: resolves DNS queries
• Top Level Domain(TLD): .com, .us, .co.za
• Second Level Domain(SLD): amazon.com, google.com

Question 2

What is Amazon Route 53?

Answer 2

• Highly available,scable, fully managed and Authoritative DNS
• Route 53 is a also a Domain Registrar
• Ability to check health of your resources
• The only AWS service which provides 100% availability SLA
• The name comes from traditional DNS port.

Question 3

Route 53 - Record Types

Answer 3

• A -> maps a hostname to IPv4
• AAAA -> maps a hostname to IPv6
• CNAME -> maps hostname to another hostanme
• NS -> Name servers for the Hosted Zone. Control how traffic is routed for a domain

Question 4

Route 53 - What is hosted Zones?

Answer 4

• A container for records that define how to route traffic to a domain and its subdomains
• Public Hosted Zones - Contains records on how to route traffic on the internet.
• Private Hosted Zones - Contains records that specify how you route traffic within one or more VPC’s

Question 5

Difference between CNAME and Alias

Answer 5

• CNAME:
  -> Points a hostname to any other hostname
  -> ONLY FOR NON ROOT DOMAIN(aka something.mydomain.com)

-Alias:
-> Points a hostname to any AWS Resource
-> Works for ROOT DOMAIN and NON ROOT DOMAIN