Default VPC and subnets in GCP - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a Default VPC in Google Cloud Platform?

A Default VPC is a pre-created virtual network in each Google Cloud project. It allows resources to communicate easily without manual network setup.

beginner

How many subnets does the Default VPC have and where are they located?

The Default VPC has one subnet in each Google Cloud region, covering all regions by default.

intermediate

What IP range does each Default VPC subnet use?

Each subnet in the Default VPC uses a /20 CIDR block, which provides 4096 IP addresses per subnet.

intermediate

Can you delete the Default VPC in a Google Cloud project?

Yes, you can delete the Default VPC, but it is recommended to create a custom VPC before deleting it to avoid losing network connectivity.

beginner

What are the benefits of using the Default VPC?

The Default VPC simplifies setup by providing ready-to-use networking, automatic subnets in all regions, and default firewall rules for basic security.

How many subnets are created by default in a Default VPC?

A One per zone

B One per region

C Only one subnet total

D None, you must create them

The Default VPC creates one subnet in each Google Cloud region automatically.

What is the default IP range size for each subnet in the Default VPC?

A /24

B /16

C /20

D /28

Each subnet in the Default VPC uses a /20 CIDR block, giving 4096 IP addresses.

Which of the following is true about the Default VPC firewall rules?

A You must create firewall rules manually

B Default firewall rules allow all traffic

C No firewall rules are created by default

D Default firewall rules allow basic internal communication and SSH

Default firewall rules allow internal communication and SSH/RDP access for convenience and security.

Can you delete the Default VPC in your Google Cloud project?

A Yes, but only if no resources use it

B Yes, anytime without restrictions

C No, it is permanent

D Only Google can delete it

You can delete the Default VPC if no resources are using it, but it is recommended to create a custom VPC first.

Why might you want to use a Default VPC?

A It provides ready-to-use networking with subnets in all regions

B It is only for testing

C It has no firewall rules

D It requires manual setup

The Default VPC provides automatic subnets and basic firewall rules, making it easy to start using networking quickly.

Explain what a Default VPC is and how its subnets are organized in Google Cloud.

Think about how Google Cloud helps you start without manual network setup.

Describe the benefits and limitations of using the Default VPC in a new Google Cloud project.

Consider why Google provides this network by default and when you might want to change it.