Why VPC provides network isolation in GCP - See It in Action

Why VPC Provides Network Isolation

📖 Scenario: You are setting up a cloud network for a small company. You want to keep different teams' resources separate so they don't interfere with each other.

🎯 Goal: Build a simple representation of a Virtual Private Cloud (VPC) network that shows how network isolation works by separating resources into different subnets.

📋 What You'll Learn

Create a dictionary called vpc_network with two subnets named exactly 'team_alpha' and 'team_beta'

Add a configuration variable called isolation_enabled set to True

Write a function called check_isolation that takes two subnet names and returns True if isolation_enabled is True and the subnets are different

Add a final line that calls check_isolation with 'team_alpha' and 'team_beta' and stores the result in network_isolated

💡 Why This Matters

🌍 Real World

Cloud providers use VPCs to keep different teams or projects' resources separate and secure, preventing accidental or malicious access.

💼 Career

Understanding VPC isolation is essential for cloud engineers and architects to design secure and well-organized cloud networks.

1

Create the VPC network with two subnets

Create a dictionary called vpc_network with two keys: 'team_alpha' and 'team_beta'. Each key should map to a list of IP addresses as strings. Use ['10.0.1.1', '10.0.1.2'] for 'team_alpha' and ['10.0.2.1', '10.0.2.2'] for 'team_beta'.

GCP

# Your code here

Need a hint?

Think of vpc_network as a map with two separate areas for each team.

2

Add a configuration variable for isolation

Add a variable called isolation_enabled and set it to True to represent that network isolation is active.

GCP

vpc_network = {
    'team_alpha': ['10.0.1.1', '10.0.1.2'],
    'team_beta': ['10.0.2.1', '10.0.2.2']
}
# Your code here

Need a hint?

This variable controls if the network keeps teams separate.

3

Write a function to check network isolation

Write a function called check_isolation that takes two parameters: subnet1 and subnet2. The function should return True if isolation_enabled is True and the two subnets are different. Otherwise, return False.

GCP

vpc_network = {
    'team_alpha': ['10.0.1.1', '10.0.1.2'],
    'team_beta': ['10.0.2.1', '10.0.2.2']
}
isolation_enabled = True
# Your code here

Need a hint?

This function compares two subnets and uses the isolation setting to decide if they are isolated.

4

Check if the two subnets are isolated

Call the function check_isolation with arguments 'team_alpha' and 'team_beta'. Store the result in a variable called network_isolated.

GCP

vpc_network = {
    'team_alpha': ['10.0.1.1', '10.0.1.2'],
    'team_beta': ['10.0.2.1', '10.0.2.2']
}
isolation_enabled = True

def check_isolation(subnet1, subnet2):
    if isolation_enabled and subnet1 != subnet2:
        return True
    else:
        return False
# Your code here

Need a hint?

This final step shows how to use the function to confirm network isolation.