Networking and Troubleshooting IT Systems
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Networking and Troubleshooting IT Systems
This course is part of TOTAL: CompTIA A+ Core 2 (220-1202) v15 Specialization
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What you'll learn
Understand the command-line interface (CLI) to navigate files, folders, and system resources.
Master essential networking concepts like IP addressing, DNS, routers, and firewalls.
Troubleshoot common system and networking issues using various recovery and diagnostic tools.
Configure and manage wireless networks, routers, and virtual LANs (VLANs).
Skills you'll gain
- Network Administration
- Remote Access Systems
- Wireless Networks
- General Networking
- Operating System Administration
- Virtual Private Networks (VPN)
- Network Protocols
- Linux Commands
- Network Routers
- Network Troubleshooting
- TCP/IP
- VPN Clients
- Network Infrastructure
- Local Area Networks
- Hardware Troubleshooting
- System Support
- Network Monitoring
- Desktop Support
Tools you'll learn
Details to know
February 2026
11 assignments
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There are 9 modules in this course
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In this in-depth course, you'll master the essential networking and troubleshooting skills required in the IT industry. Starting with foundational concepts such as networking protocols, operating system networking, and troubleshooting techniques, the course will guide you through tools and strategies to diagnose and resolve issues effectively. You will explore a wide range of technologies from TCP/IP to wireless networking, as well as hands-on practices in solving common network and system issues that you’ll encounter as an IT technician. The journey begins with command-line interface (CLI) techniques, empowering you to navigate through directories, work with files, and manage system resources. You'll gain expertise in advanced commands for both Windows and Linux environments and even get an introduction to scripting for automating tasks. From there, the course dives into key networking concepts like DNS, IP addressing, routers, and firewalls, providing you with a deep understanding of how systems communicate over the network. Troubleshooting becomes a crucial aspect of your learning, with extensive coverage of various repair tools, recovery environments, and diagnostic utilities. The course is perfect for IT enthusiasts, aspiring network administrators, and anyone eager to understand networking fundamentals. It’s ideal for beginners, with no prior networking experience required, though an understanding of basic computing can be helpful. By the end, you’ll be proficient in diagnosing networking issues, performing system repairs, and setting up both local and wide area networks. By the end of the course, you will be able to troubleshoot and resolve common networking issues, configure and manage routers, firewalls, and wireless networks, as well as use command-line tools effectively for a range of system tasks. You will also gain confidence in setting up virtual LANs (VLANs) and managing IP addressing and NAT for efficient network communication.
In this module, we will dive into the world of the Command-Line Interface (CLI), covering essential CLI commands, navigation techniques, and file management. You will also learn advanced commands for Windows and Linux, explore scripting basics, and gain the skills needed to handle common troubleshooting tasks in a CLI environment.
What's included
13 videos2 readings1 assignment
13 videos•Total 134 minutes
- Understanding the CLI•11 minutes
- Navigating the CLI•13 minutes
- Working with Folders•6 minutes
- Working with Files•11 minutes
- Working with Drives•13 minutes
- Super Copy Commands•8 minutes
- Command-Line Permissions•7 minutes
- Advanced Windows Commands•8 minutes
- Advanced Linux Commands, Part I•13 minutes
- Advanced Linux Commands Part II•15 minutes
- Introduction to Scripting•9 minutes
- Interpreted Languages•12 minutes
- Scripting and the Terminal•8 minutes
2 readings•Total 20 minutes
- Introduction to the Course 'Networking and Troubleshooting IT Systems'•10 minutes
- Full Specialization Resource•10 minutes
1 assignment•Total 15 minutes
- Working with the Command-Line Interface- Assessment•15 minutes
In this module, we will focus on troubleshooting system failures, including boot problems, application errors, and system crashes. You will learn how to leverage recovery tools such as WinRE and Advanced Startup Options to efficiently diagnose and repair Windows systems, as well as handle critical errors like Kernel Panic.
What's included
6 videos1 assignment
6 videos•Total 42 minutes
- Windows Recovery Environment•5 minutes
- Advanced Windows Startup Options•7 minutes
- Troubleshooting Boot Problems•11 minutes
- Troubleshooting at the GUI•8 minutes
- Troubleshooting Applications•6 minutes
- Kernel Panic•5 minutes
1 assignment•Total 15 minutes
- Troubleshooting Systems - Assessment•15 minutes
In this module, we will explore the key components of display technologies, including graphics cards and multi-monitor setups. You will learn how to configure and troubleshoot display systems, ensuring smooth and efficient operation of monitors and graphic interfaces in IT environments.
What's included
2 videos1 assignment
2 videos•Total 17 minutes
- Graphics Cards and Connections•13 minutes
- Multiple Monitors•5 minutes
1 assignment•Total 15 minutes
- Display Technologies - Assessment•15 minutes
In this module, we will introduce networking fundamentals, starting with Local Area Networks (LANs) and extending to networking protocols and addressing schemes. You’ll also learn how to use hexadecimal notation for IP addressing and gain the necessary skills to configure basic network settings.
What's included
2 videos1 assignment
2 videos•Total 15 minutes
- Introduction to Networking•8 minutes
- Hexadecimal•7 minutes
1 assignment•Total 15 minutes
- Essentials of Networking - Assessment•15 minutes
In this module, we will cover the essentials of TCP/IP networking, including the structure of IP addresses, the role of subnet masks, and how NAT and DHCP simplify network configurations. You will also gain hands-on experience troubleshooting network connections.
What's included
6 videos1 assignment
6 videos•Total 53 minutes
- Introduction to TCP/IP•14 minutes
- Network IDs and Subnet Masks•4 minutes
- Special IP Addresses•9 minutes
- Network Address Translation (NAT)•7 minutes
- Dynamic IP Addressing•10 minutes
- Working with Connections•9 minutes
1 assignment•Total 15 minutes
- TCP/IP Basics - Assessment•15 minutes
In this module, we will examine networking configurations and troubleshooting techniques for operating systems. You'll explore networking services such as DNS, Active Directory, and workgroups, and develop expertise in using diagnostic tools to resolve common network problems.
What's included
13 videos1 assignment
13 videos•Total 109 minutes
- Working with DNS•7 minutes
- Windows Naming•6 minutes
- Working with Workgroups•7 minutes
- Working with Active Directory•14 minutes
- Windows Sharing with macOS and Linux•7 minutes
- The net Command•4 minutes
- Routers•12 minutes
- Basic Router Configuration•12 minutes
- Firewall Configuration•11 minutes
- Windows Firewall•8 minutes
- Port Forwarding•7 minutes
- Advanced Router Configuration•8 minutes
- Virtual LANs (VLANs)•8 minutes
1 assignment•Total 15 minutes
- Operating System Networking and Network Troubleshooting - Assessment•15 minutes
In this module, we will focus on the setup, configuration, and troubleshooting of wireless networks. You'll learn about key wireless standards, encryption methods, and tools to ensure connectivity across different devices. Additionally, we’ll cover enterprise-level wireless considerations and alternative wireless technologies.
What's included
7 videos1 assignment
7 videos•Total 73 minutes
- Wireless Network Hardware•10 minutes
- Basic WAP Setup•11 minutes
- Wireless Encryption•12 minutes
- Connecting to a Wi-Fi Network•8 minutes
- Enterprise Wireless•15 minutes
- Beyond Wi-Fi•9 minutes
- Troubleshooting Wireless Connections•7 minutes
1 assignment•Total 15 minutes
- Wireless Networking - Assessment•15 minutes
In this module, we will explore key Internet and networking technologies for small office/home office (SOHO) environments. You’ll learn about remote access methods, VPN configurations, file transfer protocols, and how to secure and troubleshoot Internet connections effectively.
What's included
9 videos1 assignment
9 videos•Total 59 minutes
- Telnet and SSH•7 minutes
- Remote Desktop Connections•5 minutes
- The World Wide Web•9 minutes
- File Transfer Protocol (FTP)•7 minutes
- Proxy Servers•7 minutes
- Virtual Private Networks (VPNs)•8 minutes
- Internet of Things (IoT)•3 minutes
- Troubleshooting Internet Connections•7 minutes
- Browser Security•7 minutes
1 assignment•Total 15 minutes
- Internet and SOHO Networking - Assessment•15 minutes
In this module, we will explore the growing role of Artificial Intelligence (AI) in IT systems, its ethical implications, and its integration into cloud computing and virtualization. You’ll also learn about the challenges and limitations of AI and how to apply AI policies within organizations.
What's included
4 videos1 reading3 assignments
4 videos•Total 18 minutes
- Application Integration•5 minutes
- AI Policies and Procedures•5 minutes
- Limitations•4 minutes
- Private vs. Public•4 minutes
1 reading•Total 10 minutes
- Conclusion to the Course 'Networking and Troubleshooting IT Systems'•10 minutes
3 assignments•Total 90 minutes
- Virtualization, Cloud Computing, and AI - Assessment•15 minutes
- Full Course Assessment•60 minutes
- Full Course Practice Assessment•15 minutes
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Frequently asked questions
Networking and Troubleshooting IT Systems focuses on the essential skills needed for networking, troubleshooting systems, and resolving common IT issues. It covers everything from working with command-line interfaces (CLI) to solving complex networking problems using protocols like TCP/IP, DNS, and VPNs. This course is highly relevant because it equips individuals with the technical know-how to address networking and connectivity problems, manage devices, and optimize system performance. These skills are essential for anyone looking to work in IT support, system administration, or network management.
This course provides in-depth knowledge of networking concepts, troubleshooting techniques, and system management. Topics covered include using the command-line interface (CLI) for file management, diagnosing and fixing system issues, understanding network protocols (TCP/IP, DNS, FTP), configuring routers, and securing networks. You'll also learn about wireless networking, Internet of Things (IoT) devices, and virtualization. The course is designed to prepare learners for practical scenarios in IT environments, enabling them to troubleshoot and manage both local and wide-area networks, as well as perform system recovery and configuration tasks.
After completing the Networking and Troubleshooting IT Systems course, you'll have the ability to diagnose and resolve common IT issues related to networking, system boot problems, and software troubleshooting. You will be able to configure routers, firewalls, and wireless networks, use advanced CLI commands for file management and system administration, and troubleshoot network connectivity and performance issues. Additionally, you will have a solid understanding of IoT technologies and AI in the context of networking, and be well-prepared for handling networking challenges in professional IT roles.
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