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?
Here's a pointer to a piece that says "not really".
The TL;dr is that the performance of the network link between your home (or office) and the provider can not be reduced to a simple bandwidth number.
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. (See Internet: Quo Vadis (Where are you going?)) DNS has been found to be one of the more convenient places through which that control may be exercised.
The DNS Security system (DNSSEC) is useful in that it allows a client to know that the DNS data it receives is authentic. But DNSSEC can be somewhat difficult to deploy and many applications do not handle non-authentic DNS data well.
Absent DNSSEC DNS queries run the risk of man-in-the-middle attacks in which a masquerading DNS server misleads the client by providing misleading answers or by data-mining the client's queries.
Two recent proposals have been made to help reduce the risks of these man-in-the-middle DNS attacks.
These are DNS-over-HTTP (DoH) and DNS-over-TLS (DoT).
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".
By Lyle Weiman
Following is a survey of all the known available TCP Testing Tools. The survey includes both free and paid tools, and tools for network operators as well as TCP protocol developers. Some tools are primarily for debugging TCP operational issues, whereas others are full blown TCP protocol test suites for testing conformance and robustness for TCP client side and TCP server side operation. Some tools focus on TCP throughput and performance whereas others generate TCP traffic streams.
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