What is FTP? How File Transfer Protocol Works (Architecture, OSI Model, Active vs Passive)

Have you ever wondered how we’ve been moving files across the internet for decades—long before the cloud? This video pulls back the curtain on the original file mover: FTP (File Transfer Protocol). We explain exactly what FTP is, why it was created to solve the "universal translator" problem for early computers, and where it sits in the OSI Model (Layer 7). You'll see the genius behind its design, specifically how it uses two separate connections (Control vs. Data) to move information efficiently. We also cover the pros and cons, explaining why classic FTP is fast but insecure (sending passwords in plain text!) and how modern versions like SFTP and FTPS have evolved to fix those security flaws. Note: This video is made using AI.