My DevOps Journey: Understanding How the Internet Works 🚀

I’ve recently kicked off my adventure in DevOps and Cloud technologies through training with Shubham and the #90DaysOfDevOps challenge 💻. While I’m getting comfy with the concepts, I’m documenting my progress to lock in and expand my knowledge 📝. Today, let’s unravel a core topic: How does the Internet work? 🌐

1. How does the Internet Works?

   Internet is a global network that enables devices to communicate with each other. ⚡

   Data travels through interconnected cables linking countries, enabling instant real-time information exchange. Tier-1 companies own these cables and lease them to Tier-2 providers and beyond. 🏢

2. OSI model & TCP/IP model.

   The OSI model has seven layers that explain how data moves between devices, from cables to apps 📚. The real-world TCP/IP model, with four layers—Application, Transport, Internet, and Network—is simpler and widely used 🌍.

3. What is IP and MAC address?

   An IP address is your device’s global ID, like a home address for the Internet 📍. A MAC address is its local ID, used to find it in a nearby network 🏠.

4. Routers & Switches.

   Routers act like traffic cops, directing data between networks (e.g., from your home to a city network) 🚦. Switches connect devices in the same network, like linking your phone and laptop 🔗.

5. Firewall, Ports, Protocols.

   • Firewall: A digital bouncer that blocks unwanted data to keep your network safe 🛡️.

   • Ports: Virtual doors, like port 80 for web browsing, letting apps send or receive data 🚪.

   • Protocols: Rules for data communication, like TCP/IP for reliable Internet chats 📜.

6. Client-Server Architecture.

   This is a setup where clients (like your phone) request data or services from servers over a network 🤝.

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At the End, This is my week 1 learning and I share with you. Thanks my Mentor “Train With Shubham“ to get knowledge about networking in a easiest way.

"Week 1 of #90DaysOfDevOps2025 completed! 🚀

#Networking #DevOps #90DaysOfDevOps"