FTP explained in 7 minutes: how it really works (and why it's still around) - ASIR Network Services
FTP is one of the oldest internet services for transferring files between clients and servers. In this video, you'll see how to establish a session, what commands and responses are, and why we talk about "remote" and "local" directories. You'll understand the complete workflow: authentication, sending commands, and data transfer.
I'll also explain how to interpret response codes (1xx–5xx) to diagnose problems in seconds and why FTP is still used in real-world system administration scenarios.
Topic 4 of Network and Internet Services, 2nd year of ASIR