Prashant Kumar on Instagram: "📡 Essential Networking Protocols Explained (With Port Numbers) 🔐 In this video, we break down the most important networking protocols every IT professional, student, and tech enthusiast should know. From FTP & SSH to DNS & DHCP, here’s a quick guide to understand how devices communicate securely and efficiently across networks. ✨ What you’ll learn in this video: 🔹 FTP (TCP 21) – File Transfer Protocol 📂 🔹 SSH (TCP 22) – Secure Shell 🔐 🔹 Telnet (TCP 23) – Remo