Exam AZ-500 topic 3 question 63 discussion

Tested in lab. ASGs can be assigned to VMs that are in the same region the ASG is in AND the same VNET as the first VM that is assigned to it is in. ASG1 - VM2 ASG1 is in WEST US and VM1 on VNET1 is assigned to it, so ASG1 can only be assigned to VMs that are in VNET1. ASG2 - VM1, VM2, VM4 ASG2 is in WEST US and currently has no VMs assigned to it. So ASG1 can be assigned to VM1 and VM2 in VNET1 OR VM4 in VNET3. But not VM1/2 AND VM4 all at the same time.

ASG1: VM2 only ASG2: VM1, VM2, VM4 A Virtual Machine can be attached to more than one Application Security Group. This helps in cases of multi-application servers. There are only two requirements: • All network interfaces used in an ASG must be within the same VNet • If ASGs are used in the source and destination, they must be within the same VNet

ASG1- VM2 & VM4 ASG2-VM1,VM2,VM4

The answer is correct: ASG1: VM2 Only ASG2: VM1, VM2, VM3, VM4 Explanation according to Copilot: Azure Virtual Machines (VMs) can be assigned to Application Security Groups (ASGs) regardless of their region. ASGs allow you to group VMs and define network security policies based on those groups. Here are some key points: Application Security Groups (ASGs): Enable you to configure network security as a natural extension of an application’s structure. Group VMs and define network security policies based on those groups. Reuse security policies at scale without manual maintenance of explicit IP addresses. Handle the complexity of explicit IP addresses and multiple rule sets. Example: Consider an example where NIC1 and NIC2 are members of the AsgWeb ASG, NIC3 is a member of the AsgLogic ASG, and NIC4 is a member of the AsgDb ASG. Each NIC can be a member of multiple ASGs, up to Azure limits. Network interfaces apply rules based on the ASGs they belong to.

region constraint does not apply so the proposed answer is correct

Tested in the lab the ASG was in a UK West region and I could not add the NIC which was in North Europe Region to it so all VMs in the same region as the ASG could be added only its VM1,2,4

Application Security Groups (ASGs) are used within a single network security group (NSG). ASGs are regional resources and can only be used within the same Azure region where they are created. ASG1: VM2 and VM4 only (because they are in the same region as ASG1) ASG2: VM1, VM2, and VM4 only (because they are all in the West US region and can be grouped together in ASG2)

ASG1 - VM2 Only Because it is the only one that is in the same VNET as VM1. ASG2 - VM2 VM3 and VM4 Only Following the rule that you can only associate an ASG with a single VNET, and that even if Virtual Machines (VMs) are in the same Virtual Network (VNET), you can associate each VM with a different Application Security Group (ASG) . This would already exclude VM1 from ASG2 which is already associated with VNET1. There would then only be the possibility of VM2 VM3 and VM4 Only.

ASG1: VM2 only ASG2: VM1, VM2, VM4 A Virtual Machine can be attached to more than one Application Security Group. This helps in cases of multiapplication servers. There are only two requirements: • All network interfaces used in an ASG must be within the same VNet • If ASGs are used in the source and destination, they must be within the same VNet

Can anybody please explain why ASG2: VM1 VM2 VM3 VM4 VM1 and VM2 are in one Vnet where VM4 is in another Vnet. As per my understanding, VMs need to be under same Vnet. In that case, only VM4 should in ASG2.

On my exam today. The question asked where ASG1 only can be assigned.

Tip note from the Azure Portal when you try to add a ASG to a VM NIC: "Showing only application security groups in the same region as the network interface. If you choose more than one application security group, they must all exist in the same virtual network."

ASG1: VM2 only ASG2: VM1, VM2 and VM4 only https://learn.microsoft.com/en-us/azure/virtual-network/application-security-groups All network interfaces assigned to an application security group have to exist in the same virtual network that the first network interface assigned to the application security group is in. For example, if the first network interface assigned to an application security group named AsgWeb is in the virtual network named VNet1, then all subsequent network interfaces assigned to ASGWeb must exist in VNet1. You can't add network interfaces from different virtual networks to the same application security group.

There is not limit to the region... An ASP can has more than one NIC but all must be in the same vNet. https://learn.microsoft.com/en-us/azure/virtual-network/application-security-groups

ASG1 - VM2 ASG2 - VM1, VM2, VM4

Correct answer is : asg1 - VM2 asg2 - VM1, VM2, VM4 when ASG contains VM, you can only add other vm's that are in the same virtual network in this case VM2, if ASG(asg2) has not previously added vm's , you can add them only from the same Region, in this case US West.

Box1: VM2 only Add the network interface of VM1 to ASG1. VM1 is in VET1, all available ASGs must be in VNET1. Box2: VM2 and VM4 ASG2 is in the West US region, and it has not been attached to any NIC yet. It can be attached to NICs in the West US region, and both VM2 and VM4 are in the West US region.