Tech Subilink, Kathmandu (2026)

04/09/2026

🔥 NETWORKING PROTOCOLS & PORT NUMBERS — THE CHEAT SHEET EVERY NETWORK ENGINEER SHOULD KNOW! 🌐

Can you identify these protocols by their port numbers without looking them up? 👀

From everyday network services to troubleshooting and security, knowing common ports is a fundamental skill for network engineers, system administrators, cybersecurity professionals, and CCNA/CCNP learners.

📌 Quick Reference:
🔹 FTP — 21
🔹 SSH / SFTP — 22
🔹 SMTP — 25
🔹 DNS — 53
🔹 DHCP — 67/68
🔹 TFTP — 69
🔹 HTTP — 80
🔹 POP3 — 110
🔹 NTP — 123
🔹 IMAP — 143
🔹 SNMP — 161
🔹 LDAP — 389
🔹 HTTPS — 443
🔹 SMB — 445
🔹 LDAPS — 636
🔹 MySQL/MariaDB — 3306
🔹 RDP — 3389
🔹 PostgreSQL — 5432

💡 Pro Tip: Don't just memorize the numbers. Understand what service uses the port, whether the traffic is encrypted, and how it behaves during troubleshooting.

📸 Save this reference. You’ll thank yourself the next time you’re staring at a firewall rule, ACL, packet capture, or connection failure!

👉 How many of these ports can you name from memory? Drop your score in the comments! 👇

05/08/2026

FREE VERSIONS VERSUS PAID VERSIONS
Do not pay for Spotify, use Lyra
Do not pay for Apple TV, use Streamly
Do not pay for Netflix, use Flixio
Do not pay for Paramount+, use EpicFlix
Do not pay for Apple Music, use ESound
Do not pay for Peacock, use GlitchTV
Do not pay for Disney, use Netmirror
Do not pay for Prime Video, use CineHub
Do not pay for HBO Max, use Moviebox
Do not pay for YT Premium, use Brave browser
Do not pay for Hulu, use ShowZone
(Why do you pay for content you can get free?)

06/06/2026

Want to master AI in 2026 for $0? 🥇🎓

🛑 STOP SCROLLING!
We’ve rounded up the absolute best FREE AI courses from the world's tech giants—Anthropic, Google, Meta, NVIDIA, and more.
No hidden fees. No gatekeeping. Just pure, career-changing knowledge. 📈
💡 PRO TIP: Save this post to your profile right now so you don't lose it!

# # # 🏛️ The "Big Three" Frontier Models

⚡ 1️⃣ Anthropic: Build with Claude
• What you’ll learn: Master prompt engineering and learn how to build advanced, safety-focused applications using Claude.
• 🔗 Start Learning: https://www.anthropic.com

🤖 2️⃣ OpenAI: GPT & API Fundamentals
• *What you’ll learn: Dive into official OpenAI APIs, fine-tuning techniques, and how to build custom GPT-powered software.
• 🔗 Start Learning: https://platform.openai.com/docs

🦙 3️⃣ Meta: Open Source AI
• What you’ll learn: Explore Meta’s open-source ecosystem and discover how to deploy and customize Llama models for your own projects.
• 🔗 Start Learning: https://ai.meta.com

# # # 💼 Productivity & Enterprise Giants

🌐 4️⃣ Google: AI at Work
• What you’ll learn: A practical guide to understanding how generative AI can boost your daily productivity and transform business workflows.
• 🔗 Start Learning: https://grow.google

💻 5️⃣ Microsoft: Enterprise AI Tools
• What you’ll learn: How to leverage Azure AI services and Microsoft Copilot to build secure, scalable AI solutions for business.
• 🔗 Start Learning: https://learn.microsoft.com

🧠 6️⃣ IBM: AI for Everyone
• What you’ll learn: A beginner-friendly, comprehensive introduction to AI concepts, ethics, and applications (No coding background required!).
• 🔗 Start Learning: https://www.ibm.com/training

# # # ⚙️ Infrastructure & Engineering Powerhouses

🟢 7️⃣ NVIDIA: Deep Learning Fundamentals
• What you’ll learn: Hands-on technical courses covering the core mechanics of neural networks and hardware AI acceleration.
• 🔗 Start Learning: https://www.nvidia.com/en-us/training/

☁️ 8️⃣ AWS: Cloud AI Tools
• What you’ll learn: Build, train, and deploy models using Amazon SageMaker and Bedrock within the massive Amazon Web Services ecosystem.
• 🔗 Start Learning: https://aws.amazon.com/training/
# # # 🎓 The Community & Developer Favorites

🔥 9️⃣ DeepLearning.AI: Practical GenAI Skills
• What you’ll learn: Created by AI pioneer Andrew Ng, this platform offers world-class short courses to build practical, real-world skills.
• 🔗 Start Learning: https://www.deeplearning.ai

🤗 🔟 Hugging Face: Open Source Models
• What you’ll learn: The ultimate hands-on guide to navigating the Hugging Face hub, working with transformers, and deploying open-source models.
• 🔗 Start Learning: https://huggingface.co/tasks

💬 Which one of these are you starting with today? Let us know below! 👇

05/06/2026

🚀 # Demystifying the OSI Model: The Backbone of Network Communication! 🖥️🔗

Ever wonder exactly what happens behind the scenes when you send a WhatsApp message, watch a YouTube video, or click a link? It all comes down to the OSI (Open Systems Interconnection) model—the ultimate 7-layer roadmap that dictates how data travels across the internet.
Whether you are cramming for a networking exam (CCNA, Network+, CompTIA) or just want to level up your IT knowledge, here is your ultimate cheat sheet to mastering the 7 layers!

# # # # # The 7 Layers Breakdown (Top to Bottom)

# # # # # # Layer 7: Application Layer 🌐
The interface right in front of the user. It enables applications to access network services.
Examples/Protocols: Chrome, WhatsApp, Outlook | HTTPS, HTTP, FTP, DNS, SMTP

# # # # # # Layer 6: Presentation Layer 🎬
The translator. It handles data formatting, encryption, decryption, and compression so the application layer can understand it.
Examples/Protocols: JPEG, MP4, PDF | SSL/TLS, ASCII, UTF-8

# # # # # # Layer 5: Session Layer 🤝
The manager. It establishes, maintains, and terminates conversations (sessions) between devices.
Examples/Protocols: Session establishment & termination | NetBIOS, RPC, PPTP

# # # # # # Layer 4: Transport Layer 🚛
The coordinator. It ensures reliable end-to-end data delivery, managing segmentation, flow control, and error recovery.
Examples/Protocols: Flow control & reliability | TCP (reliable) & UDP (fast)

# # # # # # Layer 3: Network Layer 📍
The GPS. It handles logical addressing and chooses the best physical path (routing) for data packets to travel.
Examples/Protocols: Routers | IP (IPv4/IPv6), ICMP, IPsec, OSPF

# # # # # # Layer 2: Data Link Layer 🔑
The local delivery guy. It handles physical addressing (MAC addresses), framing, and error detection on the local network.
Examples/Protocols: Switches, MAC addresses | Ethernet (802.3), Wi-Fi (802.11), PPP

# # # # # # Layer 1: Physical Layer 🔌
The hardware. Transmits raw bit streams (0s and 1s) over physical mediums like cables or radio waves.
Examples/Protocols: Fiber cables, RJ45 connectors, Hubs | 10/100/1000BASE-T, RS-232

# # # # # Encapsulation vs. Decapsulation
Data doesn't just instantly appear; it travels in two directions:

Sending (Encapsulation): Data moves Down (7 \rightarrow 1). Each layer adds its own specific header (and trailer) to the data like wrapping a nesting doll.

Receiving (Decapsulation): Data moves Up (1 \rightarrow 7). The receiving device strips away the headers layer-by-layer until only the raw data reaches the user.

> 💡 Need an easy way to memorize the order from Layer 7 to Layer 1?
> Just remember this classic acronym: All People Seem To Need Data Processing!
>
Save this post to your collections so you can quickly reference it later! 💾

04/06/2026

Want to become a Graphic Designer but don't have the budget for expensive courses? 💸
The secret the industry doesn't want you to know is that all the best knowledge is already out there for free. You just need the right roadmap.
We’ve curated a massive FREE resource folder to help you skip the financial hurdle and jump straight into learning.
What you’ll master:
🔹 Graphic Design basics
🔹 Professional Logo Design
🔹 Photoshop & Adobe Illustrator
🔹 Building a client-winning Portfolio
Get instant access to the folder here: 👇
👉 link in comment

Start building your future today without spending a dime. 🛠️

03/06/2026

🚀 Mastering Site-to-Site IPsec VPN on FortiGate! 🔒🖥️
Setting up a secure tunnel between two offices doesn't have to be a headache. Whether you're a seasoned network engineer or studying for your NSE certifications, this cheat sheet breaks down a flawless FortiGate-to-FortiGate IPsec VPN configuration** into 3 simple steps.
Here is your quick blueprint for a rock-solid, secure connection:

# # # 🛠️ The 3-Step Setup Breakdown:
1️⃣ Phase 1 (IKE):Define how the firewalls talk to each other.
Pro-Tip:Make sure your Encryption (AES256), Authentication (SHA256), and DH Groups (Group 14) match perfectly on both sides, or Phase 1 will fail!
2️⃣ Phase 2 (Selectors):Define what traffic is allowed through the tunnel. Map out your local and remote subnets perfectly.
3️⃣ Firewall Policy:Create the rule to allow traffic from your internal LAN out through the IPsec tunnel interface. (And don't forget to disable NAT on this policy!)

# # # 🔍 Quick Troubleshooting Checklist:

If your tunnel isn't coming up, check these first:
Can the firewalls ping each other's public IPs?
Do the Pre-Shared Keys match exactly?
Are Phase 1 & 2 settings perfectly mirrored?
Handy CLI Command:Run "diagnose vpn ike log-filter" to see exactly where the handshake is dropping.
Save this post for your next deployment! 💾

02/06/2026

🚀 AI Agents aren’t the future. They are already replacing workflows right now. 🚀
Everyone is talking about AI, but while most people are still stuck figuring out basic "prompt engineering," a select few are building autonomous AI Agents that automate complex decisions, execute multi-step tasks, and replace entire traditional roles.
If you don't want to get left behind, you need to transition from prompting to building. Here is your ultimate, no-BS learning roadmap to master AI Agents. 👇

# # # 🗺️ The Ultimate AI Agent Learning Path
# # # # 1️⃣ Foundations (Start Here)
Get the core concepts down before you touch a single line of code or workflow builder.

🤖 DeepLearning.AI – AI For Everyone
🔗 https://www.deeplearning.ai/courses/ai-for-everyone
🌐 Google – AI Essentials
🔗 https://grow.google/ai
💻 Microsoft – AI Agents for Beginners
🔗 https://learn.microsoft.com/en-us/shows/ai-agents-for-beginners/

# # # # 2️⃣ Practical Agent Building
Learn how agents actually reason, plan, and use external tools to get things done.
🤗 Hugging Face – AI Agents Course (Completely Free!)
🔗 https://huggingface.co/agents-course
🎓 Coursera – AI Agents in LangGraph
🔗 https://www.coursera.org/
🧠 DeepLearning.AI – LangGraph Agents (Advanced)
🔗 https://learn.deeplearning.ai/

# # # # 3️⃣ Automation & No-Code Agents
Perfect if you want to build a SaaS fast, automate complex business workflows, or start monetizing your skills quickly without deep coding.
⚡ Udemy – n8n AI Agents
🔗 https://www.udemy.com/

# # # # 4️⃣ Advanced Engineering & LLMOps
To go beyond the average developer, you need to dive into official documentation and monitoring tools.
🦾 OpenAI – Agents SDK & Function Calling
🔗 https://platform.openai.com/docs/
🦜 LangChain – LangChain + LangGraph Academy
🔗 https://academy.langchain.com/
🧠 Anthropic – Claude Agent Workflows
🔗 https://docs.anthropic.com/
📊 Weights & Biases – LLMOps & Agent Monitoring
🔗 https://wandb.ai/
🚀 Fast.ai – Practical Deep Learning for Coders
🔗 https://www.fast.ai/

# # # 🛠️ If I Were Starting Today (The 3-Step Action Plan)
1. Learn the basics: Spend just a week or two understanding how LLMs think and use tools.
2. Jump into frameworks: Dive straight into LangGraph, LangChain, or n8n.
3. Build 3 real-world agents:
🔍 An AI Research Assistant (to scrape, analyze, and summarize data).
📝 An Automated Content System (to research, write, and schedule posts).
💼 A Business Workflow Agent (to handle lead routing or customer support triage).
💡 AI Agents are not just a skill—they are a massive leverage multiplier. The earlier you master them, the
harder it becomes for anyone to compete with you.

👇 Are you still using AI as a chatbot, or have you started building agents yet? Let's talk in the comments!

01/06/2026

🚀 Why is JavaScript the undisputed king of programming? Because it literally does EVERYTHING. 🚀

If you’ve ever wondered why developers keep shouting from the rooftops about JavaScript, this is why. It’s no longer just a tool to make website buttons click—it is a massive ecosystem that can build front-ends, back-ends, desktop apps, and even video games.
If you are looking to level up your dev skills, pick your path and master the stack! 👇

# # # 🌐 The Ultimate JavaScript Ecosystem Breakdown
💻 Front-End: JavaScript + React= High-performance user interfaces.
⚙️ Server-Side: JavaScript + Node.js = Scalable, lightning-fast back-ends.
🛡️ Typed Syntax:JavaScript + TypeScript = Cleaner code and fewer bugs.
📊 Data Visualization:JavaScript + D3.js = Stunning, interactive charts and maps.
📐 3D Graphics: JavaScript + Three.js= Immersive 3D experiences in the browser.
🧪 Testing: JavaScript + Jest = Making sure your code actually works.
✨ DOM Manipulation:JavaScript + jQuery = Classic, simplified web interaction.
🚀 Web Applications:JavaScript + Next.js= Production-ready, SEO-friendly full-stack apps.
🔌 APIs:JavaScript + Express= Building the bridges that connect software.
🖥️ Desktop Apps:JavaScript + Electron= Building apps like Spotify and Discord.
🎮 Game Development:JavaScript + Phaser= Creating fun, interactive 2D games.

💡 The verdict? Learn JavaScript deeply, and you unlock almost every door in software engineering.

👇 Which combination are you currently working on, or which one do you want to learn next? Let's discuss in the comments!

31/05/2026

🚀 Ready to stop chasing the AI hype and start actually using it to crush your daily workload? 🚀
Whether you are a complete beginner or looking to build your own custom AI assistant, we’ve rounded up the ultimate toolkit of courses and events to upgrade your skills.
From mastering ChatGPT and Gemini to unlocking Microsoft 365 Copilot, here is everything you need to level up your productivity game. 👇

🧠 Master the Core: ChatGPT & Advanced Prompting
1️⃣ Introduction to ChatGPT Learn the absolute fundamentals of ChatGPT and how to use it effectively without the guesswork.

2️⃣ Build Your Own ChatGPT (Tips & Tricks for Custom GPTs) Go beyond the basics. Learn how to create custom AI assistants tailored specifically to your unique business or personal needs.

3️⃣ Prompting with Purpose Master best-practice techniques and advanced prompting strategies to get the exact, high-quality results you want on the first try.
👉 Check out live courses and events here: https://lnkd.in/et-naZpT

🛡️ Build a Safe & Structured Framework

4️⃣ AI Fluency: Framework & Foundations Learn to collaborate with AI systems effectively, efficiently, ethically, and safely through a structured framework approach. Plus, earn a certificate of completion after your final assessment!
🔗 Join here: https://lnkd.in/epSxbhKi

💼 Supercharge Your Everyday Work Apps
5️⃣ Introduction to Gemini for Google Workspace Streamline your daily tasks! Learn how to use Gemini's AI features across Gmail, Docs, Sheets, and more to boost your productivity. Earn a completion badge upon finishing!
🔗 Join here: https://lnkd.in/eNgcJHG9

6️⃣ AI in Your Daily Work: Basics for Boosting Productivity with Microsoft 365 Copilot Integrate AI directly into your Word, Excel, and Teams workflow to save hours every single week.
🔗 Join here: https://lnkd.in/e-KxfpWA

💡 Which AI tool are you most excited to master this week? Let us know in the comments!

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