by Andrew Grimes | Aug 6, 2026 | ALL
https://youtu.be/Fv5cfNAYkzs
If you’re learning networking, cybersecurity, or IT, converting decimal numbers to binary is one of the most important foundational skills you’ll develop. While it might seem intimidating at first, the process is actually straightforward once you understand how binary numbers are organized.
In this lesson, we’ll walk through a simple step-by-step method for converting decimal numbers into binary using place values.
Understanding Binary Place Values
Just like the decimal system uses place values (ones, tens, hundreds, thousands), binary also uses place values—but each position is a power of two instead of a power of ten.
The common binary place values are:
Each position can only contain one of two values:
- 1 = This value is included.
- 0 = This value is not included.
The goal is to determine which place values add up to your decimal number.
Step-by-Step Conversion Process
The easiest method is to start with the largest place value and work your way down.
Ask yourself these questions for each column:
- Is the decimal number greater than or equal to this value?
- If yes, write a 1 and subtract that value.
- If no, write a 0 and move to the next column.
Repeat until you reach the 1’s place.
Example: Converting 43 to Binary
Let’s convert 43.
Start at 128:
- 128? No → 0
- 64? No → 0
- 32? Yes → 1 (43 − 32 = 11)
- 16? No → 0
- 8? Yes → 1 (11 − 8 = 3)
- 4? No → 0
- 2? Yes → 1 (3 − 2 = 1)
- 1? Yes → 1
The final binary number is:
00101011
Every 1 represents a place value that contributes to the final decimal number.
Example: Converting 186 to Binary
Let’s try a larger number.
Start with 186:
- 128? Yes → remainder 58
- 64? No
- 32? Yes → remainder 26
- 16? Yes → remainder 10
- 8? Yes → remainder 2
- 4? No
- 2? Yes → remainder 0
- 1? No
The completed binary number is:
10111010
By simply working from the largest place value downward, even larger numbers become manageable.
Why This Method Works
Instead of memorizing binary values, you’re simply breaking a decimal number into the largest powers of two possible.
Think of it like making change with coins—you always use the largest coin you can before moving to the next smallest denomination.
Each binary digit simply answers the question:
“Do I need this place value?”
If yes, write a 1.
If no, write a 0.
Practice Makes It Stick
Understanding the process is only the beginning. The real skill comes from repetition.
The more numbers you convert, the more quickly you’ll begin recognizing patterns and performing conversions without needing to think through every step.
Start with smaller numbers, then gradually work your way up to larger values until the process becomes second nature.
Final Thoughts
Decimal-to-binary conversion is one of the core skills used throughout networking and cybersecurity. Whether you’re working with IP addresses, subnetting, or other low-level networking concepts, being comfortable moving between decimal and binary will make everything else much easier to understand.
The key is to remember one simple strategy:
Start with the largest binary place value, work your way down, subtract when you can, and record each decision as a 1 or a 0.
With enough practice, converting decimal numbers to binary becomes fast, accurate, and almost automatic.
by Andrew Grimes | Jul 30, 2026 | ALL
https://youtu.be/u-ghKV__MoU
If you’re getting started in IT, networking, or cybersecurity, one of the most important foundational skills you can learn is counting in binary. It may seem intimidating at first, but once you understand the pattern, binary becomes surprisingly logical.
In this guide, we’ll break down binary counting step by step using simple examples so you can build a solid foundation for more advanced topics like subnetting, IP addressing, hexadecimal, and computer architecture.
Why Binary Matters
Computers don’t understand decimal numbers the way humans do. Instead, computers operate using only two values: 0 and 1.
Every piece of information inside a computer—from text and images to videos and IP addresses—is ultimately represented using combinations of these two digits.
Because of that, understanding binary is one of the most valuable skills you can develop early in your IT journey.
Understanding Decimal Counting
Before jumping into binary, it helps to think about how our everyday decimal number system works.
In decimal, each position represents a power of ten:
- Ones
- Tens
- Hundreds
- Thousands
As you count from 0 to 9, you can continue adding digits in the ones column. Once you reach 10, there is no room for another digit, so you carry that value into the tens column and start the ones column over at zero.
This carrying process repeats throughout the entire decimal system.
Binary Uses the Same Idea
Binary follows the exact same concept—but instead of having ten possible digits (0–9), it only has two:
That means each column fills much faster.
Instead of representing:
Binary columns represent:
Each column is worth double the previous one.
Counting in Binary
Binary counting follows a repeating pattern.
| Decimal | Binary |
|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 10 |
| 3 | 11 |
| 4 | 100 |
| 5 | 101 |
| 6 | 110 |
| 7 | 111 |
| 8 | 1000 |
Notice what happens after every column fills—it resets back to zero while carrying a one into the next column, just like decimal.
Once you understand this carrying process, binary counting becomes much easier.
Think of Binary Like Stacking Blocks
One of the easiest ways to visualize binary is by imagining stacking blocks.
Every time a column becomes full, you group those blocks together and move them into the next column.
Instead of groups of ten like decimal, binary groups everything into pairs.
This visualization helps explain why binary numbers seem to “grow” so quickly compared to decimal numbers.
Recognizing Binary Patterns
As you practice, you’ll begin noticing repeating patterns.
The rightmost bit alternates every number:
0 1 0 1 0 1 0 1
The next column changes every two numbers:
00 11 00 11
The third column changes every four numbers:
0000 1111
Each column doubles the length of its repeating pattern.
Recognizing these patterns makes binary much easier to read and understand.
Another Way to Visualize Binary
Some people understand binary better by thinking of it like an odometer.
On a car, the rightmost wheel changes first. Once it rolls over, it causes the next wheel to advance.
Binary works exactly the same way.
Instead of rolling from 0 through 9, each position only switches between 0 and 1 before carrying into the next position.
This mental model helps many students quickly understand why binary counting works the way it does.
Practice Makes Perfect
Like any new language, binary becomes easier with repetition.
The more you practice counting, recognizing patterns, and understanding carries, the more comfortable you’ll become.
This foundation will make learning topics like:
- IP addressing
- Subnetting
- IPv6
- Hexadecimal
- Computer architecture
- Networking
much easier later on.
Final Thoughts
Binary is one of the first building blocks of every IT career. Although it looks unfamiliar at first, it’s built on the same counting principles you’ve used your entire life.
Once you understand that binary simply uses two digits instead of ten, the patterns begin to make sense. Spend time practicing, recognize the repeating sequences, and you’ll quickly develop the confidence needed for more advanced networking and cybersecurity topics.
by Andrew Grimes | Jul 16, 2026 | ALL
https://youtu.be/1ZEyOXHj5hY
If you’ve ever wondered why computer storage always seems to come in sizes like 128 GB, 256 GB, or 512 GB, or why older gaming consoles proudly advertised being 8-bit, 16-bit, or 64-bit, the answer starts with one tiny electronic component:
The transistor.
Understanding what a transistor is—and how billions of them work together—is one of the best ways to truly understand how computers operate.
What Is a Transistor?
A transistor is an incredibly small electronic switch.
Like a light switch, it has two possible states:
When electricity is allowed to flow, the transistor is considered on. When electricity is blocked, it’s off.
Inside a computer, we represent these two states as:
Those simple 1s and 0s become the language every computer understands.
How Are Computer Processors Made?
Modern processors don’t start out looking like the CPU sitting inside your computer.
Instead, manufacturers begin with a silicon wafer—a perfectly polished circular disk made from highly purified silicon.
Using an incredibly precise manufacturing process called photolithography, microscopic transistor patterns are projected onto the wafer. These patterns are then etched into the silicon layer by layer.
Each completed wafer contains dozens—or even hundreds—of processor designs.
Once the manufacturing process is complete:
- The wafer is cut into individual chips.
- Each chip is tested for quality.
- Working chips are placed into protective packages.
- Those packaged chips become the CPUs installed in laptops, desktops, servers, and gaming consoles.
It’s remarkable to think that something you can hold in the palm of your hand contains billions of microscopic switches.
Why More Transistors Mean More Computing Power
Early processors contained only a few thousand transistors.
Today’s processors contain billions.
Why does that matter?
Because transistors are the building blocks of every calculation your computer performs.
The more transistors engineers can fit onto a processor, the more complex circuits they can build.
That allows processors to:
- Perform more calculations simultaneously
- Execute instructions more quickly
- Include multiple processing cores
- Add larger caches for faster memory access
- Improve performance while using less power
In general, more transistors equal more capability.
While clock speed, architecture, cache design, and software optimization all influence performance, transistor count remains one of the biggest reasons modern computers are dramatically more powerful than systems from just a few decades ago.
From Transistors to Logic Gates
A single transistor can only act as a switch.
By combining multiple transistors together, engineers create logic gates.
Logic gates perform simple decision-making operations based on binary inputs.
Common logic gates include:
These tiny building blocks are then combined into larger circuits that perform increasingly complex tasks.
For example, combining multiple logic gates creates an adder circuit, which allows a processor to add binary numbers together.
Millions—and eventually billions—of these interconnected circuits are what give modern CPUs their incredible computing power.
Why Everything Becomes Binary
Since every transistor can only be on or off, every piece of information inside a computer must eventually be represented using those two states.
That means computers store everything as combinations of 1s and 0s, including:
- Letters
- Numbers
- Pictures
- Music
- Videos
- Games
- Websites
Even something as simple as the letter A has a binary representation.
Images are stored by assigning binary values to colors, while audio becomes binary representations of sound waves.
No matter what you’re doing on a computer, underneath it all is binary.
What Does “8-Bit” Actually Mean?
If you grew up playing retro video games, you’ve probably heard terms like:
These numbers referred to how much binary information a processor could handle at one time.
For example:
- The Nintendo Entertainment System used an 8-bit processor.
- The Sega Genesis featured a 16-bit processor.
- The original PlayStation moved to 32-bit.
- The Nintendo 64 proudly advertised its 64-bit processor.
As processors became capable of handling more bits simultaneously, they could perform more advanced calculations, enabling better graphics, richer gameplay, and more complex software.
Why Do 128, 256, and 512 Keep Showing Up?
Now we can answer one of the biggest questions beginners often have.
Why do technology products constantly use numbers like:
The answer lies in binary.
Each transistor has two possible states.
Adding another binary digit doesn’t increase possibilities by one—it doubles them.
Here’s how that growth looks:
- 1 bit = 2 possibilities
- 2 bits = 4 possibilities
- 3 bits = 8 possibilities
- 4 bits = 16 possibilities
- 5 bits = 32 possibilities
- 6 bits = 64 possibilities
- 7 bits = 128 possibilities
- 8 bits = 256 possibilities
- 9 bits = 512 possibilities
These are called the powers of two, and they appear everywhere in computing because computers are fundamentally built around binary.
Why the Powers of Two Matter
Understanding the powers of two makes many IT concepts much easier to learn.
You’ll encounter these numbers in topics like:
- Binary numbers
- Hexadecimal
- Computer memory
- Storage capacities
- IP addressing
- Subnetting
- Networking
- Computer architecture
Once you recognize the pattern, many concepts that initially seem confusing begin to make much more sense.
Practice the Powers of Two
One of the best ways to remember the powers of two is through repetition.
That’s exactly why I created Double Trouble, a free interactive game where every click doubles the current number.
Before you begin, you guess how many clicks it will take to reach a target number. Then you see how close your estimate was.
It’s a simple but surprisingly effective way to build intuition for exponential growth and the powers of two.
Final Thoughts
Every computer—from your smartphone to massive cloud servers—relies on billions of tiny transistors switching on and off at incredible speeds.
Those microscopic switches form logic gates.
Logic gates create circuits.
Circuits build processors.
Processors execute software.
And because everything ultimately comes down to binary, understanding transistors also helps explain why numbers like 128, 256, and 512 appear everywhere in technology.
Once you understand the transistor, many of the patterns found throughout computer science, networking, and cybersecurity begin to click into place.
by Andrew Grimes | Jul 9, 2026 | ALL
https://youtu.be/u61VvU39_xg
Breaking into IT can feel overwhelming. Everyone seems to have a different opinion about which certifications to earn, what skills matter most, or where you should start. The result is often information overload, causing many aspiring IT professionals to jump from one course to another without making meaningful progress.
The truth is that success in IT isn’t about collecting random certifications—it’s about following a proven system.
After more than 25 years of helping students launch careers in technology, I’ve found that the most effective path can be broken down into three simple systems:
- Three Levels
- Three Learning Phases
- Three Passes for Exam Preparation
When combined, these create a roadmap that makes learning more efficient, more enjoyable, and ultimately more successful.
Step 1: Build Your Foundation with the Three Levels
Before worrying about specialization, focus on mastering the three core domains of IT.
These are commonly represented by the industry’s most recognized entry-level certifications:
- CompTIA A+ – Computing fundamentals
- CompTIA Network+ – Networking
- CompTIA Security+ – Security
Many people refer to these certifications as the “IT Trifecta,” but what’s really important isn’t the certifications themselves—it’s the knowledge they represent.
Think of these three domains as the pillars supporting your IT career.
- Computing teaches you how systems work.
- Networking teaches you how systems communicate.
- Security teaches you how to protect those systems.
Once these foundations are in place, you can specialize in areas like cybersecurity, cloud computing, networking, databases, DevOps, or IT support.
You don’t necessarily need to complete all three before landing your first IT job. In fact, many people begin working after developing a strong foundation in the first domain. However, continuing through all three creates a much stronger long-term career path.
Step 2: Stop Memorizing and Start Learning
One of the biggest mistakes people make is treating certification exams as the learning process.
Most certification courses focus almost entirely on helping you answer exam questions. While that may help you pass a test, it often leaves you with only fragments of understanding instead of seeing how everything works together.
Instead, divide your learning into three distinct phases.
Phase 1: Learn
This is where real understanding happens.
Forget about exam objectives for a while and focus on understanding how technology actually works. Explore concepts, build things, and see the “big picture.”
Learning should be enjoyable—not an endless memorization exercise.
Phase 2: Study the Certification Objectives
Once you understand the material, begin studying the specific objectives required for your certification exam.
At this point, you’re simply organizing knowledge you already understand rather than trying to memorize unfamiliar concepts.
Phase 3: Prepare for the Exam
Only after you’ve learned the material and studied the objectives should you begin preparing specifically for the certification test.
Now you’re practicing how you’ll be tested instead of trying to learn everything at the same time.
This makes exam preparation significantly less stressful and much more effective.
Step 3: Use a Three-Pass System for Practice Exams
Practice tests are one of the most valuable tools when preparing for certification exams—but only if you use them correctly.
Many students simply take practice tests repeatedly until their score improves.
A better approach is to track your understanding question by question.
When reviewing a question, ask yourself:
- Did I genuinely understand the answer?
- Did I simply guess correctly?
- Would I confidently answer this correctly again?
The goal is to answer each question correctly multiple times because you understand it—not because you remember the answer.
Questions you’ve mastered can be set aside, allowing you to spend your time focusing only on the areas where you still need improvement.
This creates a much more efficient study process and gives you greater confidence on exam day.
Certifications Are a Tool—Not the Goal
It’s important to remember that certifications are not the only path into IT.
They’re valuable because they demonstrate knowledge and provide structure, but employers ultimately care about your ability to understand technology and solve problems.
If you focus first on building real understanding, certifications become much easier to earn—and your skills become much more valuable in the workplace.
Create a System That Works for You
Success in IT isn’t about studying harder.
It’s about studying smarter.
By focusing on:
- The three foundational IT domains
- A learning-first approach through the three phases
- A structured three-pass exam preparation system
you can dramatically improve both your learning experience and your chances of passing certification exams on the first attempt.
Most importantly, you’ll develop knowledge that stays with you long after the exam is over—giving you the foundation needed for a successful, long-term career in IT.
Every journey into IT begins with a single step. Once you understand the roadmap, all that’s left is to start moving forward.
by Andrew Grimes | Jul 2, 2026 | ALL
https://youtu.be/Dq8MNiCq79g
Ask someone what an IT professional does, and you’ll probably hear something like:
“They fix computers.”
While that’s certainly part of the job, it’s only a small piece of a much larger picture. In reality, IT professionals are responsible for designing, maintaining, and protecting the technology that businesses rely on every single day.
Ironically, the better an IT team does its job, the less people notice they’re there.
The Biggest Misconception About IT
Most people only interact with IT when something breaks. Maybe the Wi-Fi stops working, a computer won’t boot, or someone gets locked out of their account.
Because of this, many assume that IT is simply “computer repair.”
The truth is that fixing individual computers is just one specialty within the field. Behind every business is an enormous amount of technology that has to be installed, configured, monitored, updated, secured, and maintained.
Without IT professionals, those systems simply wouldn’t function.
A Minecraft Server Is a Great Example
One of the easiest ways to understand IT is to think about a Minecraft server.
Most players only see the game itself. They log in, join their friends, and start playing. They never think about what makes that experience possible.
Behind the scenes, someone has to:
- Install the server
- Configure it
- Keep it updated
- Monitor performance
- Allocate storage and resources
- Restart services when problems occur
- Create backups
- Troubleshoot issues
That person didn’t create Minecraft.
They didn’t design the game.
They simply manage the infrastructure that allows everyone else to use it.
That’s exactly what many IT professionals do every day.
Businesses Depend on Much More Than Computers
A Minecraft server is fairly simple compared to what even a small business needs.
Businesses rely on dozens of critical systems, including:
- Email servers
- Web servers
- Directory services
- Network switches
- Routers
- Firewalls
- Wireless networks
- Cloud services
- Storage systems
- Backup solutions
Every one of these systems requires ongoing maintenance to stay secure, reliable, and available.
As organizations grow, so does the complexity of their infrastructure.
That’s why larger companies have entire IT departments instead of just one technician.
IT Is Made Up of Many Different Specialties
Another misconception is that everyone in IT does the same job.
In reality, IT offers many different career paths, including:
- IT Support / Help Desk
- Systems Administration
- Networking
- Cybersecurity
- Cloud Computing
- Databases
- Artificial Intelligence Infrastructure
- DevOps
- Automation
- Project Management
- IT Leadership
Each specialty focuses on different technologies, but they all work together to keep an organization’s technology running smoothly.
The Better IT Performs, the Less People Notice
Here’s one of the most interesting parts of working in IT:
When everything works perfectly, nobody thinks about IT.
Emails send successfully.
Websites stay online.
Applications load quickly.
Wi-Fi connects instantly.
Users simply expect everything to work.
Because there aren’t any problems, many people assume there isn’t much work happening behind the scenes.
But that’s exactly the point.
Maintaining technology requires constant monitoring, updates, maintenance, backups, performance tuning, and security improvements. When those tasks are done well, users never see them.
It’s only when something fails that IT suddenly becomes visible.
In many ways, success in IT means creating an experience where nobody notices your work at all.
Why IT Continues to Grow
Technology isn’t becoming simpler.
Businesses continue to adopt cloud platforms, artificial intelligence, automation, remote work, cybersecurity solutions, and increasingly complex infrastructure.
Every new technology creates additional systems that need to be deployed, secured, maintained, and supported.
That means the demand for skilled IT professionals continues to grow across nearly every industry.
Whether you’re interested in networking, cybersecurity, cloud computing, or systems administration, there are more opportunities than ever to specialize in the area that interests you most.
Final Thoughts
IT is far more than fixing computers.
It’s the profession responsible for keeping the digital world running.
From servers and networks to cloud platforms and cybersecurity, IT professionals build and maintain the infrastructure that allows businesses—and the people who work in them—to operate every day.
And perhaps the greatest irony of all?
The better they do their job, the less anyone realizes they’re doing it.
