Chris Wellens Chris Wellens

TCP Test Results: FreeBSD

I wanted to explore the Test Suite’s capabilities and ran it against various TCP/IP stack implementations.

Here are the results from a vintage 2016 release of FreeBSD 10. Note that while vintage, this code is found in many embedded systems.

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Chris Wellens Chris Wellens

Are Network Speed Tests Reliable?

It is likely that you have used one of the many network "Speed Tests". Are they trustworthy? Do they really give us a measure of our network provider's service?

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Chris Wellens Chris Wellens

Testing DNS over TLS (DoT) in Iran

The Internet's Domain Name System (DNS) is one of the strong forces that holds the Internet together. There are many forces that wish to control or restrict the Internet. A convenient place to exercise that control is DNS.

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Chris Wellens Chris Wellens

About Latency Claims

Recently we have seen a small flood of articles and promotional materials that make claims about network latency. We find many of those claims to be hyperbolic and sometimes quite misleading. Let us begin, as we almost always will begin, by informally defining the terms "latency" and "jitter".

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Chris Wellens Chris Wellens

Elements of End to End Latency

Some new technologies — 5G and Wi-Fi 6 — may (and probably do) reduce latency. However, there is no such things as zero latency in computer networks.

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Tools Survey Chris Wellens Tools Survey Chris Wellens

TCP/IP Test Tools Survey

I have surveyed all the available TCP/IP Test Tools for both network operators and application developers. Some test and measure throughput and performance; others generate traffic streams. Some are paid but most are free. Let me know if I have missed one!

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