Networking For Devops : Part 1

If you’ve ever scratched your head hearing terms like IP address, TCP/IP, or subnetting, you’re not alone. Networking seems intimidating, but once you break it down, it’s surprisingly logical — and even fun. This is Part 1 of a beginner-friendly series that aims to demystify core networking concepts with real-life examples and clear explanations.

Photo by Taylor Vick on Unsplash

🌐 What is Networking?

Networking is the process of connecting devices (like computers, phones, printers) so they can communicate and share information. Whether you’re loading a website, sending an email, or streaming Netflix — you’re using a network.

🔁 The OSI Model — Think of Layers Like a Delivery System

The OSI model (Open Systems Interconnection) is a conceptual framework used to understand how data travels across a network in 7 layers.

Here’s a relatable analogy:

Imagine you’re sending a gift to a friend.

1. Application Layer — You write the letter or pack the gift (your app generates data).
2. Presentation Layer — You wrap it nicely (formats/encrypts data).
3. Session Layer — You agree when and how to send it (session management).
4. Transport Layer — You choose delivery…