From the net: How WiFi Connection Works

 

WiFi Connection

To understand how WiFi clients connect to a network, we need to familiarize with two key processes. The first one is WPA supplicant, where WPA stands for ‘WiFi Protected Access’. The second one is the DHCP client, in which DHCP stands for ‘Dynamic Host Configuration Protocol’.

To illustrate how wifi connection works, the article will cover the following topics:

• 
  
• Intro to Wi-Fi Networks
• 802.11 Authentication and Association
• The 4-way Handshake Phase
• WPA Supplicant
• Getting a DHCP address via D-O-R-A
• DHCP logs
• Wi-Fi monitoring with NetBeez

click the image to read the full article

Free webcast: Cybersecurity. Seeing is Securing: Building Network Asset Awareness

 except from Brighttalk registration page ..  Click on the image to register

Cybersecurity. Seeing is Securing: Building Network Asset Awareness

Sep 24 2025, 12:00pm EDT

Duration: 60 mins

Presented by Jennifer Minella - Viszen Security

About this talk

You can’t protect what you can’t see—and in most environments, critical assets are hiding in plain sight. This webinar dives into how network visibility is the foundation for stronger control, smarter security decisions, and better collaboration between NetOps and SecOps. We’ll show you how infrastructure asset awareness plays a key role in Zero Trust, compliance, and incident response—and share real-world tips to reduce blind spots using tools you already have. Whether you’re locking down your environment or just trying to get a handle on what’s out there, this session will help you move from guesswork to clarity. In this webinar, you’ll learn: 1. Why Visibility Comes First How asset awareness underpins Zero Trust, compliance, and incident response. Common visibility gaps in hybrid, multi-vendor, and IoT-heavy environments. 2. Bridging NetOps and SecOps Through Shared Visibility Speaking a common “asset language” to align priorities. Using visibility to reduce friction between operational stability and security posture.............

Blast from the past : The Hewlett Packard HP 1611A (1977): A Digital Logic Analyzer Ahead of Its Time

 

In 1977, Hewlett Packard introduced the HP 1611A, a compact and innovative digital logic analyzer designed for engineers working with the rapidly growing field of microprocessors and digital systems. At a time when computers were shifting from large, room-filling machines to smaller, board-level designs, the HP 1611A gave designers a way to capture, view, and troubleshoot digital signals with speed and precision. With 16 data channels and the ability to trigger on specific logic conditions, it was an essential tool for debugging complex digital circuits that oscilloscopes alone couldn’t handle.

The HP 1611A stood out for its portability and ease of use. Unlike many bulky test instruments of the era, this model was relatively lightweight and featured a front-panel interface with straightforward controls. Engineers could directly connect to circuit boards and observe timing relationships between multiple signals at once. This functionality was critical for diagnosing race conditions, bus conflicts, and other subtle timing issues that were increasingly common in microprocessor-based designs of the late 1970s.

Beyond its technical capabilities, the HP 1611A reflects Hewlett Packard’s reputation for engineering excellence. It represented a bridge between traditional analog test equipment and the emerging need for digital analysis tools. Today, collectors and vintage computing enthusiasts see the 1611A not only as a piece of test gear but also as a historical artifact from the dawn of the personal computing era. Its design highlights how HP anticipated the needs of engineers navigating the digital revolution, making the HP 1611A a landmark instrument in the history of electronics.

---

When the Camera Isn’t the Problem: How Bad Cabling Fooled Everyone

 It’s easy to assume that when a security camera starts acting up—dropping frames, cutting out, or losing connection—the issue must lie with the camera, NVR hard drives. After all, that’s the most visible part of the system and often the first thing people think to troubleshoot is the camera. But sometimes the real culprit is hidden in plain sight, and in this case, the true problem wasn’t the camera at all.

During this particular troubleshooting session, every finger pointed at the camera: firmware, configuration, even the NVR. Hours were spent trying to reset, reconfigure, and replace software settings, but the issue kept coming back. It wasn’t until I stepped back and checked the basics that the real problem revealed itself—bad cabling. Things started to make a bit more sense when I took a closer look at the video footage and noticed there were gaps of missing time and a lot of flags stating recording is not possible due to degraded communications.

This experience is a reminder that before diving deep into complicated fixes, it’s always worth verifying the foundation. Proper cabling and termination are critical for consistent performance, especially with networked devices like IP cameras. The lesson here: don’t overlook the simplest possibilities. Sometimes the quickest path to a solution starts with checking the cables that connect everything together.

Why You Should Double-Check an Electrician’s Network Cabling Work

 

When it comes to network cabling, never assume that a job is done correctly just because it "looks" complete. In this video, I demonstrate how easily mistakes can slip through even on seemingly functional ports. I show two active network ports that are live and passing traffic—but strangely, I can’t trace them back to any label or position on the patch panel. This kind of oversight might not break your network immediately, but it creates confusion and delays when future troubleshooting or upgrades are needed.

Even more concerning, I uncover a wall jack that was not punched down properly. At first glance, everything appeared fine, but a closer inspection revealed a poor termination that have resulted in connectivity issues. These errors are often overlooked when electricians—who may not specialize in data networking—handle the cabling. Their focus may be on routing and installing cable, not on validating terminations or ensuring end-to-end continuity.

That’s why it’s critical to verify all cabling work after the electrician finishes. Use tools like a cable tester or certifier, map each port to the patch panel, and inspect each termination. I’ve been asking for photos, a video call and walk thru. Don’t wait for problems to arise down the road—check it while access is still easy and expectations are fresh. A few minutes of validation today can save hours of troubleshooting tomorrow.