Subnet modes (auto, custom) in GCP - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is an auto subnet mode in Google Cloud VPC?

Auto subnet mode automatically creates one subnet in each region with a predefined IP range. This makes setup quick and simple without manual subnet configuration.

beginner

What does custom subnet mode allow you to do in Google Cloud VPC?

Custom subnet mode lets you create and manage your own subnets manually. You choose the regions and IP ranges, giving you full control over network layout.

intermediate

How does auto subnet mode affect network control and flexibility?

Auto subnet mode offers less control because subnets and IP ranges are predefined. It is easier but less flexible for complex network needs.

intermediate

Why might you choose custom subnet mode over auto mode?

You choose custom mode to tailor your network to specific needs, such as custom IP ranges, regional subnet placement, or advanced security setups.

advanced

Can you switch a VPC from auto subnet mode to custom subnet mode after creation?

No, you cannot switch modes after creation. You must create a new VPC with the desired subnet mode and migrate resources if needed.

What happens when you create a VPC in auto subnet mode?

A You must manually create all subnets.

B Subnets are automatically created in all regions with default IP ranges.

C No subnets are created until you add them.

D Only one subnet is created in a single region.

Auto subnet mode automatically creates subnets in all regions with predefined IP ranges.

Which subnet mode gives you full control over subnet IP ranges and regions?

A Custom subnet mode

B Hybrid subnet mode

C Auto subnet mode

D Default subnet mode

Custom subnet mode lets you manually create subnets with your chosen IP ranges and regions.

Can you change a VPC from auto subnet mode to custom subnet mode after it is created?

A Yes, but only within 24 hours

B Yes, but only with command line tools

C Yes, anytime via the console

D No, you must create a new VPC

You cannot change subnet mode after creation; a new VPC must be created.

Which subnet mode is best for quick setup without detailed network planning?

A Custom subnet mode

B Manual subnet mode

C Auto subnet mode

D Hybrid subnet mode

Auto subnet mode is designed for quick setup with automatic subnet creation.

What is a key disadvantage of auto subnet mode?

A Less flexibility in subnet placement and IP ranges

B No subnets are created automatically

C Cannot connect to other networks

D Requires manual IP range configuration

Auto subnet mode limits flexibility because subnets and IP ranges are predefined.

Explain the difference between auto subnet mode and custom subnet mode in Google Cloud VPC.

Think about how much control you have over subnet creation and IP ranges.

Describe a scenario where choosing custom subnet mode is better than auto subnet mode.

Consider when you want to design your network carefully.