Network Security, Troubleshooting, & Certification Prep

Overview

Updated in May 2025. This course now features Coursera Coach! A smarter way to learn with interactive, real-time conversations that help you test your knowledge, challenge assumptions, and deepen your understanding as you progress through the course. This course provides essential skills in network security, troubleshooting, and preparation for certification exams. You will gain a deep understanding of core networking services, security practices, common network attacks, and effective defense strategies. By the end, you'll be well-prepared to handle network issues and ensure secure operations in diverse network environments. Starting with an introduction to network services like DNS, NTP, and PTP, the course guides you through essential network functionalities. You'll then explore key concepts in network security, focusing on encryption, IAM, and various authentication types. The course continues by detailing common network attacks, including DoS, VLAN hopping, ARP poisoning, and DNS spoofing, providing insights into preventing these threats. You will also learn how to implement robust network defense strategies such as device hardening, NAC, key management, and honeypot techniques. Practical troubleshooting skills are a major focus, with lessons on resolving cable, interface, hardware, and wireless issues, alongside using powerful tools like iPerf and OS-level commands. This course is perfect for aspiring network professionals and those preparing for certification exams like Network+. It is ideal for individuals seeking hands-on experience with network security, troubleshooting, and exam prep, with no advanced prior knowledge required.

Syllabus

Network Services

In this module, we will cover essential network services like DNS, NTP, and PTP, and explore how time synchronization and hostname resolution contribute to network stability and security.

Introduction to Network Security

In this module, we will introduce the fundamentals of network security, from encryption and authentication to physical security and IAM systems, ensuring a well-rounded understanding of securing your network.

Common Network Attacks

In this module, we will dive into common network attacks, explaining their methods and showing you how to prevent or mitigate these threats to safeguard your network infrastructure.

Network Defense Strategies

In this module, we will cover essential network defense strategies, including hardening devices, managing encryption keys, and using honeypots to protect your network from potential threats.

Network Troubleshooting

In this module, we will walk you through troubleshooting methodologies and tools, helping you effectively diagnose and resolve network issues, from hardware to wireless problems.

Exam Preparation

In this module, we will provide practical study tips and guidance for preparing for the Network+ exam, along with advice on how to approach the exam day with a calm and focused mindset.

Next Steps

In this module, we will congratulate you on completing the course and provide direction for your next steps as you continue to build your skills and progress in your networking career.