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🎯 Our mission is to make technology education simple, accessible, and practical for everyone.
📌 Programming Notes | Tech Facts | CodingTips | Career Guidance

Master SQL with this handwritten SQL Cheat Sheet! Learn the most important SQL commands, JOINs, aggregate functions, cla...
14/07/2026

Master SQL with this handwritten SQL Cheat Sheet! Learn the most important SQL commands, JOINs, aggregate functions, clauses, operators, and query syntax in one place. Perfect for beginners, Data Analysts, MIS Executives, and MNC interview preparation.

🔌 What is a Port Number?A port number is a 16-bit number used in computer networking to identify a specific service or a...
11/07/2026

🔌 What is a Port Number?

A port number is a 16-bit number used in computer networking to identify a specific service or application running on a device. While an IP address identifies the device, the port number identifies the service on that device.

📌 Examples:
✅ Port 20/21 – FTP
✅ Port 22 – SSH
✅ Port 23 – Telnet
✅ Port 53 – DNS
✅ Port 80 – HTTP
✅ Port 443 – HTTPS

💡 Easy to remember:
🏠 IP Address = House Address
🚪 Port Number = Room/Apartment Number

Learning port numbers is essential for CCNA, networking, cybersecurity, and troubleshooting.

Follow NetworkDuck for more easy networking notes and CCNA concepts!

🚀 Understanding Recursion in Python made simple!If you’ve ever wondered how a function can call itself and still return ...
06/07/2026

🚀 Understanding Recursion in Python made simple!

If you’ve ever wondered how a function can call itself and still return the right answer, this note breaks it down with a clear example, explanation, and stack diagram 📘🐍

Learn: ✔ What recursion is.....

✔ Base case vs recursive case
✔ How function calls go into the call stack
✔ Step-by-step factorial example

Perfect for Python beginners who want to master one of the most important programming concepts. 💡

02/07/2026

Python or Java ???

Data analysis
02/07/2026

Data analysis

Types of computer networks
30/06/2026

Types of computer networks

Python.... Basics
30/06/2026

Python.... Basics

📧 Did you know there are hundreds of email service providers around the world? 🌍From Gmail and Outlook to Proton Mail, Z...
29/06/2026

📧 Did you know there are hundreds of email service providers around the world? 🌍
From Gmail and Outlook to Proton Mail, Zoho Mail, and many more—learn who they are and which country they belong to in these easy handwritten notes. 📝

💙 Follow CodeNexus for more programming, computer science, and tech learning content!

Understanding E-mail vs G-mail
29/06/2026

Understanding E-mail vs G-mail

Programming Symbols and their name.
27/06/2026

Programming Symbols and their name.

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