Sharing notes from my ongoing learning journey — what I build, break and understand along the way.
From Switching to VLANs: How Trunks, Tagging and STP Keep Networks Organized As someone new to switching, the confusion usually starts at this point: “I plugged in the cable, the devices can see each other… so is the job done?”…
How Data Really Moves in a Network: MAC Addresses, ARP, Broadcast Domains and the Logic Behind It When you start building or managing a network, everything looks simple at first: there is a cable, a switch, an IP address –…
Understanding VPN and Tunneling in Depth What Is a VPN? A VPN (Virtual Private Network) is a method of creating a secure, encrypted, and logical “private network” over an untrusted network (most commonly the internet).Its main goals are: Common Uses…
Understanding Public and Private Networks in Depth One of the invisible yet most critical parts of our daily lives are networks. Whether we connect to the internet, talk on the phone, send a file to an office printer, or watch…
Understanding Modem, Router, Switch and Access Point When it comes to using the internet at home or at work, a few device names keep popping up: modem, router, switch, and access point. These names often get mixed up, and since…
RAID Explained: From Basics to Advanced Insights When we came to the topic of RAID in class, I realized that this is not just a technical concept, but something that touches the very heart of computing. On one hand, it’s…
Understanding CPU Cache vs RAM: Speed, Technology, and Memory Hierarchy Since I started learning about computer architecture, one of the things that surprised me the most is this: CPUs are insanely fast, but RAM can’t keep up. That’s why we…
What a NIC Is and How It Shapes Speed, Latency, and Stability Although I’ve been deep into the software side lately, today my focus is the network interface card (NIC): the piece that lets my computer “see” the network at…
From DNS Lookup to Rendering: The Journey of a Web Request We do this countless times every day: type an address into a browser, hit Enter, and the page appears in seconds.But in that short moment, a lot happens behind…
AWS Serverless Guide – From Zero to Advanced To support my journey as a system administrator and to lay solid foundations in the security field, I’ve gathered my notes from an AWS Lambda training I completed. I wanted this write-up…