Understanding AWS VPC and Subnets

What does VPC stand for in AWS?

• Virtual Public Cloud

• Virtual Private Cloud

• Virtual Protected Cloud

• Virtual Private Connection

What is the primary purpose of a VPC?

• To enhance the performance of cloud applications.

• To manage user access and permissions.

• To store large amounts of data securely.

• The primary purpose of a VPC is to provide a secure and isolated network environment within a cloud infrastructure.

How many VPCs can you create per AWS account by default?

• 3

• 10

• 15

• 5

What is the difference between a public subnet and a private subnet?

• A private subnet allows internet access; a public subnet does not.

• A public subnet allows internet access; a private subnet does not.

• A public subnet is more secure than a private subnet.

• Public subnets are used for storage, while private subnets are for compute resources.

Which type of subnet can directly access the internet?

• Public subnet

• Private subnet

• DMZ subnet

• VPN subnet

What is CIDR notation used for?

• CIDR notation is used for specifying IP addresses and their network masks.

• CIDR notation is used for managing database connections.

• CIDR notation is used for defining user permissions.

• CIDR notation is used for encrypting data transmissions.

What is the CIDR notation for a subnet with 256 IP addresses?

• /30

• /26

• /24

• /22

What is the default size of a VPC in AWS?

• /20 CIDR block (4,096 IP addresses)

• /8 CIDR block (16,777,216 IP addresses)

• /24 CIDR block (256 IP addresses)

• /16 CIDR block (65,536 IP addresses)

Can a private subnet have a route to the internet?

• No, a private subnet cannot connect to the internet at all.

• Yes, a private subnet can connect directly to the internet without any additional services.

• Yes, a private subnet can have a public IP address assigned directly.

• Yes, a private subnet can have a route to the internet via a NAT gateway.

What is an Elastic IP in the context of AWS?

• A reserved IP address that cannot be reassigned to different instances.

• An Elastic IP in AWS is a static public IP address that can be associated with EC2 instances.

• A private IP address used for internal communication only.

• A dynamic IP address that changes with each instance restart.