Post Views: 1,634 Looking for some ideas for what to gift someone in the tech/networking field? Here are some, but don’t forget – we have two other places to get things: our Wi-Fi Adapters that support monitor mode article and our “Go Bag” page. The links to the products shown here are all available through […]
Post Views: 2,843 For all my troubleshooting network friends, I have compiled a list below of the top software-based network troubleshooting tools that you need to have and know. It you want to add hardware to your toolkit – have a look at our “Go Bag“ If you want to know more about the commands
Top 12 Network Troubleshooting Tools Read More »
Post Views: 4,856 The links to the products shown here are all available through Amazon, and if you use these links, we will get a small cut through our Amazon Associates program without affecting the price you pay. We thank you for doing this. You can also check out my Amazon Storefront here. I often
The Network Products We Use in Our “Go Bag” Read More »
Post Views: 8,396 So often in Wireshark videos and classes we spend a lot of time on TCP behavior. But what I am about to discuss is hardly ever brought up. The answer to version is simple right? Version 4. OK, kind of right, but overlooking too much. The truth is that there are multiple
Which Version of TCP are you using? Read More »
Post Views: 3,972 I understand the argument: Since there is so much TCP (HTTP anything, etc. etc.) this is what the user experiences. That argument has several issues. First, we need to discuss the problems with using TCP at all as there are technical reasons the idea does not align with the goal of speed
Why TCP Should Never be Used for Speed Tests Read More »
Post Views: 4,505 Retransmissions of frames in WLANs (Wireless Local Area Networks) can become problematic for several reasons, primarily due to the nature of the wireless medium. While retransmissions are a necessary part of ensuring data integrity in unreliable networks, they can cause inefficiencies and degrade network performance. I will get to the details below,
Recognizing WLAN Retransmissions is a Critical Skill Read More »
Post Views: 18,337 Signal-to-Noise Ratio (SNR) is a measure of how strong a signal is compared to the background noise in a communication system. It is typically expressed in decibels (dB). The higher the SNR, the clearer and more reliable the signal. I often get asked, how is signal to noise calculated. Frankly the math
The Signal to Noise Ratio (SNR) Calculation Read More »
Post Views: 14,061 As most of my readers, students, and clients know, I absolutely love Wireshark. I deeply am infatuated with Wireshark’s Profiles, more properly called configuration profiles. So much so that many years ago now, I set up the first Wireshark Profiles Repository. 100’s of thousands of downloads have resulted, and I hope I
Automatically Switch Configuration Profiles in Wireshark Read More »
Post Views: 3,843 When you run a speed test, you are testing several key aspects of your internet connection. The purpose is to measure the performance of your connection to the internet in terms of download speed, upload speed, latency or delay, and jitter or delay variation. The problem is that not all speed tests
What does an Internet Speed Test actually test? Read More »
Post Views: 6,783 As many of you who have been in my classes, or are my clients, know, I am not a fan of the accuracy and meaning of speed tests. Perhaps I am being a little technical here. Over the next several posts, I want to provide some detailed information on Speed Tests. I
What are the best Speed Test tools? Read More »
Post Views: 2,138 It’s always tough to do these Top 10 posts. I mean, depending on your job, where you access the network, what it is you are trying to do, you may have some favorite tcpdump commands that I don’t show here. That said, lets take a look at some great TCPdump commands. By
Top 10 TCPdump commands Read More »
Post Views: 2,258 That’s right folks. I have been searching and searching. I actually gave up for a while as the only thing available was PCIe based adapters. Well that all changed with a search today and this showed up: Here is the link. This will go through my Amazon Associate link – if you
A Wi-Fi 7 Tri-Band USB Adapter now available on Amazon Read More »
Post Views: 5,709 Wow. What a couple of weeks. Lesson learned: never ever ever ever make a web site environment change right before you go on vacation. Ultimately the issues you all have experienced with this web site were my fault. I take full responsibility. I am sorry. I hope you can forgive me and
Apologies for the CellStream.com Site Issues Read More »
Post Views: 13,250 A CLEAR WORD OF CAUTION – ONLY USE THIS TOOL WHERE YOU HAVE PERMISSION. THIS ARTICLE IS OFFERRED FOR LEARNING PURPOSES ONLY. Hping3 is a network tool designed for packet crafting and analysis, similar to Scapy but with a more command-line-oriented interface. It is often used for testing and troubleshooting network infrastructure,
What is, and how can you use hping3? Read More »
Post Views: 5,579 A great question in my two day Security class recently. The physical layer (Layer 1) of the layered model is responsible for the transmission of raw data bits over a communication medium. Although it is often considered more secure due to its reliance on physical components, it is still vulnerable to a
What are some examples of Physical Layer Threats in Networking? Read More »
