@ayushmangarg

Physical Layer (Layer 1) — The Roads & Signals of Networking

Sep 16, 2025 · 6 min read · Hey, welcome back! If you read the last blog, you already know why we need network models. Today we move from why to how: the Physical Layer — the actual roads, wires, and radio waves that carry the bits. In simple terms: if OSI/TCP-IP tell devices h...

How Computers Understand Each Other: OSI & TCP/IP Models Simplified BLOG (2/10)

Sep 15, 2025 · 5 min read · Hey, welcome back! In the last blog of this series, I asked you a simple question: If millions of devices are talking to each other all the time, how does one computer understand what other computer is “saying”? So let’s discuss that today. But hey...

How Computers Learned to Talk – The Beginning of Networks

Sep 14, 2025 · 4 min read · Let’s Start With a Question When was the last time you messaged someone?Maybe on WhatsApp, Twitter, or on Instagram — probably a few minutes ago. Now pause for a second and think: How did that message travelled from your phone to your friend’s phone...

Understanding DynamoDB, Global Secondary Index, and Local Secondary Index

Jul 16, 2025 · 4 min read · DynamoDB: What is it? Amazon Web Services (AWS) offers a NoSQL database service called DynamoDB. It adheres to the ACID (Atomicity, Consistency, Isolation, and Durability) properties. It can process millions of requests per second and is very scala...

DeepSeek R1

Jan 28, 2025 · 3 min read · Hey guys, if you are active on Twitter or LinkedIn these days, then you must have seen this word a lot, DeepSeek. When I was scrolling Twitter the other day, I saw a post praising it, then another, and then a lot more. So I decided to deep dive into ...