CCNA Packet Tracer Labs – Networking Fundamentals

This project contains a series of hands-on labs I built using Cisco Packet Tracer while learning core networking concepts. These labs were part of my foundational training to support my career path in penetration testing and cybersecurity.

Although my focus is on offensive security, I believe that understanding how networks function at the protocol level is essential for identifying misconfigurations, bypassing defenses, and performing deeper network analysis. These labs helped me build that knowledge step-by-step through real scenarios.

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🧠 What I Learned

Each lab explores a different topic in networking, from basic configuration to more advanced routing protocols. Here's a breakdown of what I covered:

🔁 Routing Protocols

• Static Routing – Manual path setup for simple networks.
• RIP – Basic dynamic routing using hop count.
• EIGRP – Efficient distance-vector routing with faster convergence.
• OSPF – Scalable link-state protocol suitable for large networks.
• BGP – Exterior routing used on the internet between ISPs.

🏠 LAN & IP Services

• Default Routing – Routing strategy for stub networks.
• DHCP – Automating IP address assignment.
• Syslog – Logging device activity for monitoring and auditing.
• NTP – Time synchronization across network devices.
• TFTP – Transferring configs and images between devices.

🔐 Access Control & NAT

• ACLs – Filtering traffic using standard and extended rules.
• Static NAT – One-to-one IP mapping.
• Dynamic NAT – Pool-based translation of internal addresses.

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📄 CCNA Cheat Sheet (Work-in-Progress)

I've also started creating a CCNA Cheat Sheet that summarizes key commands, configurations, and concepts used in each lab. It’s currently about 70–80% complete, and I plan to finish and refine it soon.

The goal is to have a quick-reference guide that reinforces what I’ve practiced and can help others reviewing this repository understand each lab more easily.

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🧪 List of Labs

• Lab1: Basic Configuration
• Lab2: Static Routing
• Lab3: RIP Protocol
• Lab4: EIGRP Protocol
• Lab5: OSPF Protocol
• Lab6: BGP Protocol
• Lab7: Default Routing
• Lab8: DHCP Configuration
• Lab9: Syslog
• Lab10: NTP
• Lab11: TFTP
• Lab12: ACLs (Standard and Extended)
• Lab13: Static and Dynamic NAT
• Lab14: Extra testing scenarios and configs

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💼 Why This Matters for Cybersecurity

A strong understanding of networking helps in many areas of penetration testing and security assessment:

• Tracing network paths and identifying attack surfaces
• Recognizing and exploiting routing or NAT misconfigurations
• Testing firewall rules and ACL behavior
• Pivoting between systems during lateral movement

These labs gave me the context and confidence to approach real-world network environments with a security mindset.

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🔧 Tools Used

• Cisco Packet Tracer v8.2+
• Networking devices: Routers, switches, end hosts, and servers

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📁 Folder Contents

This repo includes .pkt files (Packet Tracer labs) and the in-progress CCNA_Cheat_Sheet.pdf. Each .pkt file includes a saved lab with complete configuration.

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📌 Note

All labs were created and tested manually. No automation tools were used — just practice, learning, and troubleshooting through trial and error. The cheat sheet is still in progress, and I'll be updating it regularly.

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👨‍💻 About Me

Aspiring penetration tester with a solid foundation in networking.
These labs highlight my hands-on practice with core network protocols and configurations as part of my journey into ethical hacking.

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Thanks for checking this out! 🚀