AZ-104: Microsoft Azure Administrator Full Course - What are Subnets

The video tutorial explains the concept of virtual networks and subnets, highlighting their importance in network segmentation. It covers how subnets improve security, performance, and manageability. The tutorial details subnet address ranges, emphasizing the need for unique CIDR blocks and careful planning. It also discusses Azure's default routing, the ability to override it, and the reservation of IP addresses within subnets. The video concludes with a note on capacity planning, explaining how reserved IPs affect available addresses.

What is one of the primary benefits of using subnets within a virtual network?

• They automatically increase network speed.

• They provide logical divisions for better management.

• They eliminate the need for security measures.

• They allow for unlimited IP addresses.

Why is it important to plan your subnets carefully?

• To maximize the number of reserved IP addresses.

• To allow subnets to share the same CIDR block.

• To ensure subnets have overlapping address ranges.

• To prevent address range overlaps within the network.

What does Azure reserve in each subnet address range?

• The first and last two IP addresses.

• The first three and the last IP address.

• The last five IP addresses.

• The first five IP addresses.

How many usable IP addresses are there in a /24 CIDR block after Azure's reservation?

• 252

• 251

• 255

• 256

What can you do to override Azure's default routing between subnets?

• Reserve more IP addresses.

• Disable subnet segmentation.

• Increase the CIDR block size.

• Use a network virtual appliance.