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...

Without a network card, you won't be able to surf the Web. Hence, this video talks about how to troubleshoot a network card.
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This clip is from the chapter "Book Chapter 18 - Essentials of Networking" of the series "CompTIA A+...

Structured cabling is the process of installing and organizing cable systems to ensure long term, reliable connections. While CompTIA doesn't want you to be a cable installer, a good tech understands structured cabling and can work...

CompTIA doesn't expect you to prove you can crimp your own cables, but it does expect you to understand the crimping process. Additionally, you must know EIA standards for crimping cables.
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This clip is from the chapter "Book...

Networking uses many different types of cables such as coaxial, twisted pair, and even fiber-optic. These different cables use special connectors, and a good tech should recognize the different cables and their connectors.
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When a router connects two or more LANs, it creates a Wide Area Network. To understand WANs, it's critical to understand routers and how they use logical addressing.
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This clip is from the chapter "Book Chapter 18 - Essentials...

Hexadecimal numbering uses a base-16 system that's very convenient for IT techs. It's important to look at a hex value and understand the equivalent binary value.
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This clip is from the chapter "Book Chapter 18 - Essentials of...

The central box that connects devices on our LANs has gone through many advancements over the years. Whether hubs or switches, a good tech understands the function and features of these boxes in our LANs.
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You will never understand the power of the Internet without first starting at the most basic form of networking: the Local Area Network (LAN). LANs use a central piece of hardware to interconnect individual devices, transferring data...

The CompTIA A+ exams will challenge you on monitor troubleshooting. Whether it's simply changing the input or replacing a burned-out bulb, troubleshooting displays is critical for techs.
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This clip is from the chapter "Book...

It's easy to think of projectors as nothing more than monitors that project on a wall but that's a bit short-sighted. Projectors come with their own technologies and configurations that a good tech understands.
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This video shows how to write a shell script that sends an automatic mail alert when the RAM memory gets low.
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This clip is from the chapter "Scheduling jobs with at and crontab" of the series "Complete Bash Shell...

Individual sticks of DRAM will have very different capacities. It’s important to understand RAM capacities and how sticks work together to provide the total memory for a system. This clip is from the chapter "RAM" of the series "CompTIA...

Installing RAM is at first glance a simple process but the devil’s in the details. RAM slots, pairing, and speed matching must all be considered during the installation. This clip is from the chapter "RAM" of the series "CompTIA A+...

Dynamic Random Access Memory (DRAM) comes in a number of versions defined by the doubling of commands they process per clock cycle. It’s important for techs to recognize these technologies and the speed rating systems used. This clip is...

DRAM varies in other ways, such as single-sided or double-sided DRAM. Different motherboards may or may not be able to take advantage of these features. This clip is from the chapter "RAM" of the series "CompTIA A+ Certification...