Cybersecurity 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 Internet Connectivity and Network Cabling: A Complete Guide

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

Before a single packet reaches your application, it has to traverse an enormous amount of physical and logical infrastructure. Understanding that infrastructure — from the cable plugged into your wall to the backbone routers of your ISP — isn’t just interesting trivia. It shapes how you design networks, troubleshoot outages, and think about availability and reliability in a security context.

This guide covers how internet connectivity is delivered and the physical cabling technologies that underpin modern networks.

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:

Google Gemini 3: A Leap Forward in Multimodal Reasoning and Developer Tooling

Wed, 19 Nov 2025 00:00:00 +0000

The AI arms race is accelerating, and Google is stepping up with Gemini 3 — a new multimodal model designed to reason, code, and generate interactive outputs at a new level. In this post I summarize what Google announced, how the new capabilities differ from previous releases, and what developers and everyday users should expect from Gemini 3, Gemini 3 Pro, Gemini Agent, Gemini 3 Deep Think, and Antigravity.

TL;DR

Feature	Summary
Gemini 3	Latest multimodal model with improved reasoning and stronger code execution
Gemini 3 Pro / Deep Think	Targets complex reasoning; Deep Think evaluates multiple hypotheses in parallel
Antigravity	Multi-pane agent developer environment for autonomous coding workflows
Integration	Rolling out across Google Search, Gemini App, and Vertex AI

What’s New — Highlights

Gemini 3 and its related services bring a few meaningful changes beyond raw model size or latency:

What's New in Java 25 (JDK 25)

Fri, 24 Oct 2025 00:00:00 +0000

Java 25 (JDK 25) is here — and it’s an LTS release. That means most vendors will support it for years, and many teams will plan upgrades from JDK 17 or 21 directly to 25. In this post, I’ll walk through the highlights that matter in real projects: language changes, concurrency improvements (Project Loom), runtime and GC work, observability via JFR, security/crypto, and AOT ergonomics.

This post is based on the official OpenJDK pages and JEPs for JDK 25.