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CompTIA A+ Certification Core 2 (220-1102) - Port Forwarding
NAT is a handy tool but comes with a huge drawback: no servers behind the firewall are accessible to the outside world. Port forwarding allows opening specific ports on your NAT-enabled router to provide access to servers behind it. This...
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CompTIA A+ Certification Core 2 (220-1102) - Windows Firewall
Like all operating systems, Windows comes with a built-in software firewall. Unlike the firewall on your router, this firewall only protects a single system. It's important for techs – and the users they support – to understand how to...
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CompTIA A+ Certification Core 2 (220-1102) - Routers
The CompTIA A+ exams challenge test takers to perform many configurations of a typical home router. But what does a router do for a SOHO network? This clip is from the chapter "Local Area Networking" of the series "CompTIA A+...
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CompTIA A+ Certification Core 2 (220-1102) - The net Command
The Windows net command has so many features that it deserves its own video. We use the net command for everything—from querying the network to accessing shares. This clip is from the chapter "Local Area Networking" of the series...
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CompTIA A+ Certification Core 2 (220-1102) - Working with Active Directory
More advanced Windows networks use Active Directory Domains instead of Workgroups. These Domains, especially Microsoft's Active Directory-enabled Domains, provide powerful services for larger networks. This clip is from the chapter...
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CompTIA A+ Certification Core 2 (220-1102) - Windows Naming
Microsoft introduced a series of naming protocols, some of which predate the Internet. Interestingly, these protocols (or at least their modern versions) are still alive and well not only on Windows systems but on Linux and macOS systems...
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CompTIA A+ Certification Core 2 (220-1102) - Working with DNS
When a user complains the Internet is down, what's often happening is that DNS isn't working. There are a few simple tools and procedures to diagnose and repair DNS problems. This clip is from the chapter "Local Area Networking" of the...
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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) - 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) - 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...
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CompTIA A+ Certification Core 2 (220-1102) - Navigating the CLI
Navigating your mass storage is one of the most critical CLI functions. To do it, you will need to know about specific commands, their relevant switches, and how directories are structured. This clip is from the chapter "Working with the...
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CompTIA A+ Certification Core 2 (220-1102) - Understanding the CLI
All operating systems provide at least one command-line interface (CLI). While the CLIs differ, they all share certain features and functions. This clip is from the chapter "Working with the Command-Line Interface" of the series "CompTIA...