The USCIS logo looks cooler than my Korean army unit's logo. I passed my U.S. citizenship interview and test on April 14th, 2026! Full Timeline: December 9, 2025: Filed my N-400 applica...

What is ISO 27001 certificate? ISO stands for the International Organization for Standardization. The ISO 27001 certificate evaluates whether an organization or individual can effectively establish...

The most popular Anti-virus tools I used in the past. Kaspersky Kaspersky was the undisputed king of anti-virus software during its prime. It provided a distinct sense of satisfaction to run a ful...

The Evolution of Windows Backup Historically, Windows was never known for its backup prowess. Unlike macOS and its seamless Time Machine, Windows backup features were often clunky, unreliable, or s...

I am sharing this post because employers are often curious whether candidates have the physical ability to lift over 30 lbs, a common requirement in many technical and field roles. The Motivation ...

The TA Life: Boots on the Ground Before joining the ROK Army, I spent my final semester as an undergraduate Teaching Assistant (TA) at a university in Korea. While a TA in the US might focus on gra...

My Windows history My journey began in 1995 at the age of five with MS-DOS. Since my father ran a computer shop, I naturally learned how to assemble hardware and install software even before I star...

Do I have a Security Clearance? I do not currently hold a security clearance but am fully prepared to undergo the investigation process if required What is a Security Clearance? A security clearan...

CompTIA security+ logo looks cooler than my army unit's logo. Motivation CompTIA Security+ is a foundational requirement that nearly every company demands for junior-level cybersecurity positions...

This summary is based on Hoony’s Easily Written Cisco Networking (3rd Edition) by Kang Hoon Jin (ISBN: 978-89-315-5116-7), often referred to as the “Network Bible” in Korea. I have condensed the co...