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Which Version of TCP are you using?
Post Views: 33 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
Why TCP Should Never be Used for Speed Tests
Post Views: 176 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
Recognizing WLAN Retransmissions is a Critical Skill
Post Views: 208 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,
The Signal to Noise Ratio (SNR) Calculation
Post Views: 909 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
Automatically Switch Configuration Profiles in Wireshark
Post Views: 273 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
What does an Internet Speed Test actually test?
Post Views: 163 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
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