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CompTIA A+ Certification Core 2 (220-1102) - Understanding DNS
Individual hosts use IP addresses, but humans are terrible at memorizing long strings of numbers. To make our lives easier, most TCP/IP networks (and certainly the Internet) use the Domain Name System (DNS) to apply more human-friendly...
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CompTIA A+ Certification Core 2 (220-1102) - Working with Connections
When two computers begin the process of sharing data, they create what we call a connection (or session). A good tech knows how to use common utilities to observe these connections and diagnose issues. This clip is from the chapter...
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CompTIA A+ Certification Core 2 (220-1102) - Dynamic IP Addressing
Manually entering IP addresses into all our devices is an administrative nightmare. To avoid this mess, smart techs use the Dynamic Host Configuration Protocol (DHCP) to automatically provide IP addresses to individual hosts. This clip...
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CompTIA A+ Certification Core 2 (220-1102) - Network Address Translation (NAT)
You'd be hard-pressed to find a home or small office router that isn't using Network Address Translation (NAT). NAT provides some amazing benefits but also has some serious limitations. This clip is from the chapter "Local Area...
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CompTIA A+ Certification Core 2 (220-1102) - Special IP Addresses
The designers of IP addresses reserved many IP addresses for special uses. From loopback to private IP addresses, a good tech understands these special addresses as well as when and how to use them. This clip is from the chapter "Local...
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CompTIA A+ Certification Core 2 (220-1102) - Network IDs and Subnet Masks
IP addressing was designed from the ground up for flexibility in supporting LANs and WANs of any size. The first step towards understanding this flexibility is to understand Network IDs and how they interact with a subnet mask to get...
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CompTIA A+ Certification Core 2 (220-1102) - Introduction to TCP/IP
The Transmission Control Protocol/Internet Protocol (TCP/IP) is the cornerstone of Internet addressing and routing. It's important to understand IP addressing schemes and to see how TCP and IP work together to make the Internet work....
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CompTIA A+ Certification Core 2 (220-1102) - Kernel Panic
A kernel panic is an unrecoverable error, generated by every operating system, to inform the user that a serious problem has taken place in the system. Kernel panics look scary, but to an informed tech they're often very easy to fix if...
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CompTIA A+ Certification Core 2 (220-1102) - Troubleshooting Applications
Applications cause trouble at two main times. The first is right after Windows finishes loading and then loads start-up applications. After that, applications can cause trouble any time a user starts to get their work done. Either way,...
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CompTIA A+ Certification Core 2 (220-1102) - Troubleshooting at the GUI
When a system boot there is a point where Windows begins to load. Any boot failure between the initial Windows boot and the Windows Desktop requires careful understanding and the use of multiple tools to diagnose and repair. This clip is...
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CompTIA A+ Certification Core 2 (220-1102) - Troubleshooting Boot Problems
There are a thousand reasons for a Windows system to not booting properly. The trick is to separate the different reasons into distinct areas and then understand the right tools to diagnose the problems. This clip is from the chapter...
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CompTIA A+ Certification Core 2 (220-1102) - Advanced Windows Startup Options
Advanced Startup Options was the go-to tool before WinRE, providing many features (such as Safe mode) that helped techs fix Windows systems. Advanced Startup Options live on in WinRE, so it's important for techs to know how to access and...
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CompTIA A+ Certification Core 2 (220-1102) - Windows Recovery Environment
The Windows Recovery Environment (WinRE) provides technicians with a powerful toolset for repairing and recovering Windows systems. While powerful, WinRE is also easy to use once a tech understands the function of all the tools it...
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CompTIA A+ Certification Core 2 (220-1102) - Scripting and the Terminal
Scripting can make tedious tasks more efficient, but there are several other reasons to use it as well. This video reviews the use cases for scripting, what can happen when scripting goes wrong, and a few other helpful tips. This clip is...
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CompTIA A+ Certification Core 2 (220-1102) - Interpreted Languages
Every operating system contains interpreters that can read higher-level programming languages. This video covers three popular interpreters: Visual Basic, Python, and JavaScript. This clip is from the chapter "Working with the...
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CompTIA A+ Certification Core 2 (220-1102) - Introduction to Scripting
Scripting is the process of combining a list of commands into text files to easily re-run the whole sequence of commands again later. Every operating system has at least two if not more scripting functions to allow a tech to do exactly...
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CompTIA A+ Certification Core 2 (220-1102) - Advanced Linux Commands
The CompTIA exam covers a few more advanced Linux commands. These commands enable some unique navigation. This clip is from the chapter "Working with the Command-Line Interface" of the series "CompTIA A+ Certification Core 2...
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CompTIA A+ Certification Core 2 (220-1102) - Advanced Windows Commands
The Windows command line also provides hundreds of tools, and many have nothing to do with managing files, folders, and drives. A good tech should understand commands for manipulating processes and group policies. This clip is from the...
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CompTIA A+ Certification Core 2 (220-1102) - Command-Line Permissions
All Linux/UNIX operating systems share a unique file/folder permission system, very different from Windows', which requires careful understanding. This clip is from the chapter "Working with the Command-Line Interface" of the series...
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CompTIA A+ Certification Core 2 (220-1102) - Super Copy Commands
Every CLI provides a basic copy command to move files from one location to another. These basic tools lack special features such as copying entire folder structures. That's where special "Super†copy commands come in. This clip is from...
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CompTIA A+ Certification Core 2 (220-1102) - Formatting in Action
File systems are created through the process called formatting. . There are several different ways to format mass storage and a good tech knows how to do this for the most common file systems. This clip is from the chapter "Implementing...
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CompTIA A+ Certification Core 2 (220-1102) - Working with Drives
Every CLI provides a complete set of tools to administer our mass storage drives. You will find tools to format and partition drives, scan for errors and correct them, and more. This clip is from the chapter "Working with the...
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CompTIA A+ Certification Core 2 (220-1102) - Working with Files
Within that big tree of folders, the data itself is saved in individual files. A good tech must understand how to create, delete, and move files. This clip is from the chapter "Working with the Command-Line Interface" of the series...
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CompTIA A+ Certification Core 2 (220-1102) - Working with Folders
The data stored in our mass storage devices is organized into a large tree of folders (also known as directories). A good tech must understand how to create, delete and move folders. This clip is from the chapter "Working with the...