AWS Classroomnotes 12/Feb/2023

AWS Networking – Workshop Part 2

• Create two vpcs in two regions and ensure we have ec2 instances with some application running on http
  
  
• Create a Network/Application Load Balancer for each region
  
  
  
  

DNS (Domain Naming Server)

• DNS servers are used to store records mapping domain/host names to ip addresses
• Every system has a local DNS record
  • Windows: c:\windows\system32\drivers\etc\hosts
  • Linux /etc/hosts
• Servers which store these records are called as Name Servers
• DNS servers which are used for public access are hosted by organizations and they are generally called as hosted zones
• Domains can be purchased by many third parties, In aws also we can register domains
  
• In AWS Route 53 is DNS as a Service
• For multi region solutions we use Route 53 Routing policies Refer Here
• To configure active-passive Refer Here
  
  
• If you want to try latency based routing Refer Here
• Note:
  • The smallest subnet in AWS is /28 and largest is /8
  • CIDRS can be expanded