Question-47: The control information included inside individual packets is analyzed by the Firewall Rules. The packets in question are either denied access or granted access by the Rules depending on the rules that are described on these pages. Rules for a firewall may be issued either directly to individual computers or to policies, which are then allocated to individual computers or groups of computers. In preparation for an imminent launch, you put up an auto scaling instance group to handle the flow of web traffic. After setting the instance group as a backend service to an HTTP(S) load balancer, you see that virtual machine (VM) instances are being terminated and re-launched on a minutely basis. This occurs after you have configured the load balancer. There is no public IP address associated with the instances. Using the curl command, you have confirmed that each instance is producing the correct web response. You will want to check that the backend has been properly set up. What action should you take?
A. Check to see that there are firewall rules in place that will enable HTTP and HTTPS source traffic to communicate with the load balancer.
B. Give each instance a public IP address, and then configure the firewall such that it will enable the load balancer to communicate with the public IP addresses of the instances.
C. Verify that a rule has been added to the firewall to enable load balancer health checks to communicate with the instances that are part of the instance group.
D. On each instance, you should create a tag that contains the name of the load balancer. Create a rule in the firewall using the instance tag as the destination and the name of the load balancer as the source.
Correct Answer
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: 3 Explanation: Option-1 and Option-2 wouldn't turn the VMs on or off, it would jsut prevent traffic. Option-3 would turn them off if the health check is configured to terminate the VM if it fails. Option-4 is the start of a pseudo health check without any logic, so it also isn't an answer because it is like Option-1 and Option-2.Ensure that a firewall rule exists to allow load balancer health checks to reach the instances in the instance group. (VM) instances are being terminated and re-launched every minute. ' Isn't it because the health check is failing? A & Option-4 May Be already there.curl command passed.