Subnets

- [Instructor] I need to make a correction at this point. … Technically speaking, … virtual machines are not added to virtual networks. … Virtual networks are made up of one or more subnets. … The first subnet of a VNet will be called default, … but you can rename it to whatever you wish. … Each subnet can have its own security settings … called a network security group or NSG. … So these subnets are often used … to separate out the layers of an application. … You can have the web servers in one subnet, … because they need the Internet to be able to access them, … but then you can have the application servers … in a different subnet because you don't want the Internet … to be able to access them. … You would want to put each application component … that needs its own security settings into its own subnet. … Each subnet is a subdivision … of the larger virtual network space. … So to return to our previous example, hypothetically, … if we created a virtual network … with the address base 10.0.0.0/24, …