42 Abu Dhabi

NetPractice

Network Configuration Fundamentals

2 weeks

Individual Project

TCP/IPSubnettingRoutingCIDR

A practical networking project focusing on TCP/IP addressing, subnetting, routing, and network troubleshooting through hands-on configuration exercises.

Source Code

Key Features

IP Configuration

Configured IP addresses, subnet masks, and default gateways for various network topologies.

Subnet Planning

Designed efficient subnetting schemes to optimize address space utilization and network segmentation.

Routing Tables

Configured static routing tables to enable communication between different network segments.

Network Security

Implemented basic network security principles through proper subnet isolation and access control.

Development Journey

Level 1-3

IP Addressing Fundamentals

Learned basic IP addressing, subnet masks, and network configuration. Practiced simple network setups with host identification and basic routing.

Level 4-6

Subnetting & CIDR

Advanced subnetting concepts, CIDR notation, and network segmentation. Implemented complex subnet calculations and address space optimization.

Level 7-8

Routing & Switching

Complex routing scenarios with multiple networks, default gateways, and inter-network communication. Configured routing tables for multi-segment networks.

Level 9-10

Advanced Network Design

Comprehensive network design challenges combining all concepts. Implemented enterprise-level network configurations with proper security and efficiency.

Challenges & Solutions

Subnet Calculations

Problem:

Understanding CIDR notation and calculating proper subnet ranges for different network requirements and host counts.

Solution:

Practiced binary arithmetic and developed systematic approach to subnet mask calculations.

Routing Logic

Problem:

Configuring routing tables to ensure proper packet forwarding between multiple network segments and gateways.

Solution:

Studied routing principles and implemented step-by-step routing table configuration.

Network Optimization

Problem:

Optimizing IP address space utilization while maintaining proper network segmentation and security boundaries.

Solution:

Applied VLSM (Variable Length Subnet Masking) techniques for efficient address space management.

network_config.txt

bash

# Network Topology Configuration
# Interface Configuration
Interface A1:
  IP: 192.168.1.1
  Mask: 255.255.255.128 (/25)
  Network: 192.168.1.0/25
  Broadcast: 192.168.1.127
  Valid Hosts: 192.168.1.1 - 192.168.1.126

Interface B1:
  IP: 192.168.1.129
  Mask: 255.255.255.128 (/25) 
  Network: 192.168.1.128/25
  Broadcast: 192.168.1.255
  Valid Hosts: 192.168.1.129 - 192.168.1.254

# Routing Table Configuration
Router R1:
  Route to 192.168.1.128/25 via 192.168.1.129
  Route to 0.0.0.0/0 via 192.168.1.1 (default)

# CIDR Calculation Example
Network: 10.0.0.0/22
Subnets needed: 4
Host bits: 10 (1024 hosts per subnet)
Subnet mask: 255.255.252.0
Subnets:
  10.0.0.0/22   (10.0.0.1 - 10.0.3.254)
  10.0.4.0/22   (10.0.4.1 - 10.0.7.254)
  10.0.8.0/22   (10.0.8.1 - 10.0.11.254)
  10.0.12.0/22  (10.0.12.1 - 10.0.15.254)

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