TCP/IP Model: What are Layers & Protocol? TCP/IP Stack

The TCP/IP Model is the backbone of how the internet actually works. Instead of seven layers like OSI, this model keeps things lean with four layers: Application, Transport, Internet, and Network Interface. Each layer has one job — from how apps send data, to how packets are routed across the globe, to how bits leave your physical device. Together they form the end-to-end system that lets billions of machines speak the same digital language. In this episode, we explore: • What the TCP/IP Model is and why it replaced OSI in real-world networking • How the four layers work: Application, Transport (TCP/UDP), Internet (IP), and Network Interface • Core protocols: TCP, IP, HTTP, SMTP, DNS, SNMP, FTP, Telnet • Why TCP/IP is both scalable and brutally reliable • OSI vs TCP/IP — the practical differences engineers actually care about • Advantages, limitations, and how the stack shapes every modern network today 🌐 Reserve your permanent digital ad space: AdParcel.io 📗 Learn software testing in 1 day: TestingIn1Day.com 💻 Connect with tech founders: StartupMafia.net