You have four front-end web servers behind a load balancer, which use NFS to access another EC2 instance that resizes and stores images for the front-end application. What security group policies should be assigned to these servers?

  • Assign Elastic IPs to all of the instances and create a group that allows all traffic to pass between each of the five Elastic IP addresses and allow all inbound HTTPS traffic.
  • Front-end web servers should allow HTTPS. Assign another group to all of the instances that allows all traffic to pass between instances using that group.
  • Create a security group that allows inbound NFS, HTTP, and HTTPS traffic from all IP addresses. Apply this group to all of the servers.
  • Create a security group that allows inbound HTTP and HTTPS traffic from all IP addresses and apply this to the web servers. Create a second security group for the NFS filestore that allows outbound NFS traffic to the private IP range of the front-end web servers.
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