Sharing notes from my ongoing learning journey — what I build, break and understand along the way.
WLAN Explained: How Wi-Fi Works, Which Band to Use, and How to Secure It Wi-Fi is often seen as “set up the modem, type the password, done.” At home, for most people, it really is like that. But once you…
Firewall, NAT and DMZ: How Network Security Really Works in Practical Setups When you’re just starting to build a network, the goal is usually simple: devices should get internet access, servers should run, and everyone should be able to do…
DHCP and DNS Basics: How Devices Get IP Addresses and Resolve Names in Real Networks When we first check whether a network is working, we usually measure it by the cable, Wi-Fi, and the question “Is it getting an IP?”…
Routing and WAN: How Routers Choose the Best Path Across Networks Once you’ve somewhat internalized IP and subnetting, the next question naturally appears: “Okay, devices in the same subnet can find each other. But how does traffic travel between different…
IP Addressing and Subnetting: How IPv4/IPv6 and CIDR Define Network Boundaries As someone new to networking, IP addresses can initially feel like something you just memorize: numbers starting with 192.168… and then expressions like /24, /26 on top of that.…
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…