Protocols on

Internet Protocol (IP) Explained: Addressing, Subnets, DHCP, and NAT

Thu, 27 Nov 2025 00:00:00 +0000

Every device on the internet speaks one language at the network layer: IP. Whether a packet travels from your browser to a web server around the world, or bounces between two VMs inside a private data center, the Internet Protocol is what makes routing possible. It’s also, by no coincidence, one of the most exploited protocol layers in cybersecurity — from IP spoofing to DHCP starvation attacks.

This guide takes you through the mechanics of IPv4 addressing, subnetting, DHCP, and NAT. No hand-waving. Just the internals.

Network Communication Basics: Ethernet, MAC Addressing, and How Local Networks Work

Thu, 27 Nov 2025 00:00:00 +0000

Networks are everywhere, but most people — including many IT professionals — treat them as black boxes. You plug in a cable, data travels, things work. But when things don’t work, or when you’re trying to understand how an attacker moves laterally inside a network, the black box has to open.

This guide covers the fundamentals of local network communication: how devices talk to each other at the Ethernet layer, how addresses work, and how the physical and logical design of a network shapes its behavior.

Understanding HTTP Status Codes: What They Mean and How to Use Them

Sun, 23 Nov 2025 00:00:00 +0000

HTTP status codes are the server’s vocabulary for telling clients what happened. Three digits. Completely standardized. And yet, they’re routinely misused in ways that break API clients, confuse security tools, and inadvertently leak information about your infrastructure.

This guide covers what each status code category means, when to use specific codes, and a few security considerations that most tutorials skip.

The Five Categories

Status codes are grouped by their first digit: