Internet Networks & Network Security | Google Cybersecurity Certificate

Introduction

This tutorial outlines the key concepts from the Google Cybersecurity Certificate course on Internet Networks and Network Security. It will guide you through the fundamentals of networking, network protocols, and security practices vital for protecting networks from cyber threats. By the end of this guide, you'll have a solid understanding of how networks operate and how to secure them effectively.

Step 1: Understand Network Communication

• Familiarize yourself with how devices connect and communicate over a network.
• Explore the difference between local network communication (e.g., within a home or office) and wide area network communication (e.g., internet).
• Key concepts to study:
  • Types of networks: Local Area Network (LAN) and Wide Area Network (WAN).
  • The role of routers and modems in facilitating communication.

Step 2: Learn Network Architecture

• Review the structure of networks, including the various components involved.
• Understand the Transmission Control Protocol/Internet Protocol (TCP/IP) model.
• Key components to focus on:
  • Network hardware: routers, switches, and access points.
  • Data flow in networks and how devices interact.

Step 3: Explore Network Protocols

• Delve into the fundamental protocols that govern network communications.
• Study the functions of key protocols within the TCP/IP model, including:
  • Internet Protocol (IP)
  • Transmission Control Protocol (TCP)
• Understand how these protocols ensure reliable data transmission.

Step 4: Identify Network Vulnerabilities

• Recognize common vulnerabilities that can compromise network security.
• Be aware of cyber attack tactics such as:
  • Denial of Service (DoS) attacks
  • Network intrusion tactics (e.g., phishing, malware)
• Practical tips:
  • Regularly update network devices and software to mitigate vulnerabilities.

Step 5: Secure Networks

• Learn methods to protect networks from cyber threats.
• Implement security measures such as:
  • Firewalls: configure to block unauthorized access.
  • System hardening: reduce vulnerabilities by disabling unnecessary services.
  • Virtual Private Networks (VPNs): encrypt data to secure communications.

Step 6: Conduct Security Hardening

• Understand the process of securing systems against attacks.
• Focus on these areas:
  • Operating System (OS) hardening: apply security patches, disable unused ports.
  • Network hardening: segment networks, use strong passwords.
  • Cloud hardening: secure cloud services and data storage.

Conclusion

In this tutorial, we've covered the essentials of network communication, architecture, protocols, vulnerabilities, and security practices. To further enhance your knowledge, consider taking the full Google Cybersecurity Certificate course. This will provide you with in-depth insights and practical skills needed for a career in cybersecurity. Stay proactive in your learning and continuously update your skills to keep pace with the evolving landscape of network security.