COMPUTER NETWORKING

Detailed explanation-1: -NSGs can be associated to subnets or individual network interfaces (NIC) attached to VMs. When an NSG is associated to a subnet, the rules apply to all resources connected to the subnet. Traffic can further be restricted by also associating an NSG to a VM or NIC.

Detailed explanation-2: -You can associate zero, or one, network security group to each virtual network subnet and network interface in a virtual machine. The same network security group can be associated to as many subnets and network interfaces as you choose.

Detailed explanation-3: -An Azure Network Security Group (NSG) is a core component of Azure’s security fabric. Leveraging an NSG, you can filter traffic to and from Azure resources that you have commissioned on an Azure Virtual Network (VNet). At its core, an NSG is effectively a set of access control rules you assign to an Azure resource.

Detailed explanation-4: -In the NSG blade, locate the Subnets option under Settings. Click on the Associate button at the top of the page and wait for the new blade to open: