When I started this course, I wasn’t sure what to expect. After 13 years as an Air Force medic and now working in more of an administrative role, I’ve spent plenty of time using computers. However, I never really understood what was happening behind the screen. That curiosity is what brought me here. I wanted to know how computers actually work and how they stay connected in today’s digital world. Two topics quickly stood out to me: how computers operate, and network architecture.
Why These Topics?
Let’s be honest, computers are everywhere. Whether I’m scheduling appointments, managing records, or just sending emails, I rely on them constantly. But I realized that if I want to grow in IT, I need to go beyond just using the tools. I need to understand them. That’s where these two topics come in.
How Computers Really Work
It’s easy to take for granted how a computer boots up or runs a program. But under the hood, there’s a whole world of components working together. The CPU (central processing unit) is like the brain. “The CPU determines the sequence of execution of instructions, and guides the movement of data within the machine. It directly interacts with all other components” (Mercando, 1995). RAM (random access memory) temporarily holds data so the CPU can access it quickly, while storage keeps everything saved for the long haul. Learning how these parts interact has helped me understand why performance issues happen. For example, if a computer is running slow, it might not be a virus. It could just be low on RAM. Knowing this gives me the confidence to troubleshoot instead of panic.
Programming and Machine Language
Even though I’m still new to programming, I’ve learned that everything a computer does starts with code. High-level languages like Python or Java get translated into machine code that the CPU can understand. This process, whether through a compiler or interpreter, is what makes software run.
Software: The Tools That Make It All Click
Application software is what lets us interact with computers in meaningful ways. Whether it’s Microsoft Word or a network monitoring tool, software relies on the hardware to function. In IT, tools like Cisco Packet Tracer help visualize how data moves through a network through simulation, and “helps us build simple and complex networks” (Bhola, 2022), which is incredibly helpful for someone like me who learns best by seeing things in action.
The Power of Networks
Now let’s talk about networks. Whether it’s a home Wi-Fi setup or a global cloud infrastructure, networks are what keep us connected. I’ve learned about LANs (local area networks), WANs (wide area networks), and the devices that make them work such as routers, switches, and servers. “Wide Area Network (WAN) has enormous demands in the digital era because WAN connects computers/devices globally to the Internet. Where these connections help in the communication of devices and data transfer to users at geographical locations. WAN is a collection of two or more Local Area Networks (LANs)” (Bhola, 2022). What really fascinates me is how network architecture supports both performance and security. In today’s hybrid work environments, where people are logging in from everywhere, having a solid network structure is more important than ever. Tools like VPNs and cloud services make it easier to stay connected and protected.
Database Systems
Behind every system is a mountain of data. That’s where databases come in. They store, organize, and manage information so it can be accessed quickly and securely. Whether it’s patient records in a hospital or user logs in a corporate network, understanding how database management systems (DBMS) work is key to keeping everything running smoothly.
Bringing It All Together
What I’ve learned is that computer operations and network architecture aren’t just technical topics, they’re the foundation of everything in IT. They’ve helped me see the bigger picture and given me the tools to start thinking like a tech professional. As the course text puts it, “a solid understanding of computing fundamentals and network structures is critical for any IT professional” (CertMaster Learn Tech+, 2024). I couldn’t agree more. This is just the beginning of my journey, but I already feel more confident and capable. Whether I end up in cybersecurity, systems administration, or technical support, I know these skills will be with me every step of the way.
References
- CertMaster Learn Tech+ FC0 U71. (2024). Information Technology Foundations. Pearson.
- Mercando, A. D. (1995). Computer Basics. Pacing & Clinical Electrophysiology, 18(5), 1058–1062. https://doi.org/10.1111/j.1540-8159.1995.tb04748.x
· Bhola, A., Jain, A., Lakshmi, B. D., Lakshmi, T. M., & Hari, C. D. (2022). A Wide Area Network Design and Architecture using Cisco Packet Tracer. 2022 5th International Conference on Contemporary Computing and Informatics (IC3I), Contemporary Computing and Informatics (IC3I), 2022 5th International Conference On, 1646–1652. https://doi.org/10.1109/IC3I56241.2022.10073328