diff --git a/README.md b/README.md
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 | [Session 8](sessions/beginner/session8) | Bash Scripting (part 1) |
 | [Session 9](sessions/beginner/session9) | Bash Scripting (part 2) |
 | [Session 10](sessions/beginner/session10) | Text Processing (part 2) |
+| [Session 11](sessions/beginner/session11) | Processes and Systemd|
+| [Session 12](sessions/beginner/session12) | Computer Networking |
 
 ### Advanced Content 🚀
 
diff --git a/sessions/beginner/session12/Computer_Networking.pdf b/sessions/beginner/session12/Computer_Networking.pdf
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+# Session 12 – Computer Networking 🌐
+
+##  Overview
+
+This session introduces the essential concepts of Computer Networking from the ground up.
+
+Starting with building a simple network, we gradually explore how modern networks evolved, why standards became necessary, how data travels across different devices, and the protocols that make Internet communication possible.
+
+By the end of this session, you should understand how computers communicate inside a local network and across the Internet, as well as the role of each networking layer and device.
+
+---
+
+## Agenda 📖
+
+- Making a Simple Network prototype
+- Some History
+- Standardization: OSI & TCP/IP Models
+- Some Network Devices
+- Some Protocols
+- A Packet’s Life Cycle
+
+---
+
+## Materials 📚
+
+- [Slides](Computer_Networking.pdf)
+
+---
+
+## Resources 📕
+
+- **Wiki-Linux**
+- [Networks] https://open-source-community.github.io/Wiki-Linux/Linux-advanced-topics/Networking/README
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