What Are Ports? Explained Simply with Real Examples (SMTP, IMAP, IANA) скачать в хорошем качестве

What Are Ports? Explained Simply with Real Examples (SMTP, IMAP, IANA)

Understanding ports is essential to understanding how the internet actually works. In this video, I explain why we need ports, how a single server can run multiple services at the same time, and how ports help computers know which service you’re trying to reach. I also cover: 🔹 Why ports are standardized and reserved by IANA 🔹 How well-known ports (0–1023) make communication easier 🔹 Examples using Gmail’s mail servers  — Port 25 → SMTP (server-to-server mail sending)  — Port 587 → SMTP submission  — Port 993 → IMAP over SSL/TLS 🔹 How ports allow the same server to run many applications in parallel Whether you’re a beginner or brushing up your networking basics, this video explains ports in simple, real-world terms.