DMZ architecture in Cybersecurity - Mini Project: Build & Apply

Understanding DMZ Architecture

📖 Scenario: You are working as a network security assistant helping to design a safe network layout for a small company. The company wants to protect its internal network while allowing public access to its web server.

🎯 Goal: Build a simple representation of a DMZ (Demilitarized Zone) architecture using a dictionary to show different network zones and their purposes.

📋 What You'll Learn

Create a dictionary named network_zones with exact keys and values representing zones and their descriptions

Add a variable named public_zone to specify which zone is accessible to the public

Use a loop with variables zone and description to iterate over network_zones.items()

Add a final key-value pair to network_zones representing the firewall with its description

💡 Why This Matters

🌍 Real World

Understanding DMZ architecture helps protect company networks by separating public servers from internal systems, reducing security risks.

💼 Career

Network security professionals design and manage DMZs to safeguard sensitive data and ensure safe access to public services.

1

Create the initial network zones dictionary

Create a dictionary called network_zones with these exact entries: 'Internal Network': 'Trusted zone for company devices', 'DMZ': 'Semi-trusted zone for public servers', 'External Network': 'Untrusted internet zone'.

Cybersecurity

# Create the network_zones dictionary with specified zones and descriptions
# Your code here

Need a hint?

Use curly braces {} to create a dictionary and separate each key-value pair with commas.

2

Add a variable for the public accessible zone

Add a variable called public_zone and set it to the string 'DMZ' to indicate which zone is accessible to the public.

Cybersecurity

network_zones = {
    'Internal Network': 'Trusted zone for company devices',
    'DMZ': 'Semi-trusted zone for public servers',
    'External Network': 'Untrusted internet zone'
}
# Define the public_zone variable
# Your code here

Need a hint?

Assign the string 'DMZ' to the variable public_zone.

3

Iterate over the network zones to review descriptions

Use a for loop with variables zone and description to iterate over network_zones.items(). Inside the loop, write a comment explaining that this would be where you check or display each zone's description.

Cybersecurity

network_zones = {
    'Internal Network': 'Trusted zone for company devices',
    'DMZ': 'Semi-trusted zone for public servers',
    'External Network': 'Untrusted internet zone'
}
public_zone = 'DMZ'

# Loop through network_zones to access each zone and its description
# Your code here

Need a hint?

Use for zone, description in network_zones.items(): to loop through the dictionary.

4

Add the firewall zone to the network zones dictionary

Add a new key-value pair to the network_zones dictionary with the key 'Firewall' and the value 'Controls traffic between zones'.

Cybersecurity

network_zones = {
    'Internal Network': 'Trusted zone for company devices',
    'DMZ': 'Semi-trusted zone for public servers',
    'External Network': 'Untrusted internet zone'
}
public_zone = 'DMZ'

for zone, description in network_zones.items():
    # Here you could check or display the zone and its description
    pass

# Add the firewall zone to network_zones
# Your code here

Need a hint?

Add the new key and value to the dictionary using square brackets and assignment.