Exam AZ-104 topic 5 question 43 discussion

Correct Answer: Box 1: Yes A Basic Load Balancer supports virtual machines in a single availability set or virtual machine scale set. Box 2: Yes When using load-balancing rules with Azure Load Balancer, you need to specify health probes to allow Load Balancer to detect the backend endpoint status. The configuration of the health probe and probe responses determine which backend pool instances will receive new flows. You can use health probes to detect the failure of an application on a backend endpoint. You can also generate a custom response to a health probe and use the health probe for flow control to manage load or planned downtime. When a health probe fails, Load Balancer will stop sending new flows to the respective unhealthy instance. Outbound connectivity is not impacted, only inbound connectivity is impacted. Box 3: No There will be no loadbalancing between the VMs. Basic Load Balancer: Virtual machines in a single availability set or virtual machine scale set. Standard Load Balancer: Any virtual machines or virtual machine scale sets in a single virtual network.

Answer seems correct to me: - For Basic Sku load balancer, network interface and load balancer have to be in the same availability set. (Y) - Principal of LB (Y) - Deletion of rule: there will no loadbalancing to the VM's (N)

The probe does not impact whether the load balancer does balancing to the backend VMs. It just checks the health of the backend VMs and will not send traffic to a faulty or unresponsive VM so it's an extra feature. Even if the probe is missing or incorrectly configured, the load balancer will still balance traffic between the VMs. The balancing of traffic is not dependent on the health probe itself, but the probe is crucial for monitoring the health of VMs. Without a probe, the load balancer won’t stop sending traffic to a VM, even if it becomes unhealthy or unavailable. The question is misleading, and I would put No for that. Remove the probe, will it balance? yes, so answer to that question should be No. The other two are pretty straight forward. Final Answer Bob: Y N N

CORRECT

Given answer is correct

y-y-y ; deleting the rule not means that Lb will not balance the request that are coming; more than that, will allow all connections coming to frontend IPand balance to backend

Answer seems correct to me: - For Basic Sku load balancer, network interface and load balancer have to be in the same availability set. (Y) - Principal of LB (Y) - Deletion of rule: there will no loadbalancing to the VM's (N)

YYN..given answer is correct and as per other comments

I think Box 1 should be 'No'. Basic Load Balancer supports "Virtual machines in a single availability set or virtual machine scale set", so availability set is not the only option to Basic LB. I just did a test, if you put 2 VMs in a VMSS that in a single placement group, you can add this VMSS into Basic LB's backend pool. https://docs.microsoft.com/en-us/azure/load-balancer/skus Any suggestions?

Y-Y-Y Check the link provided in the answer: LB Basic SKU is "Open by default. Network security group optional."

Am I missing something here? If you delete the load balancing rule, surely you'd still have the load balancer? And the Load Balancer's job is to spread traffic between the machines sitting behind it?

Answer is correct

I would say that is Y, Y, Y. Because if you delete rule 1, LB would not balance traffic from port 80 to port 80.

Any confirmation that this is a correct answer ?