Post Views: 994 This question was sent to me in an email following my posts on regarding TCP CUBIC. The answer is Yes—Microsoft Windows does support TCP CUBIC, but the nuance is in how and when it’s used. For many years, Windows defaulted to Compound TCP (CTCP) rather than CUBIC. Meanwhile, Linux distributions standardized on […]
Does Windows support TCP CUBIC? Read More »
Post Views: 715 I described what Adaptive Bit Rate Streaming (ABR) is in my prior article, if you need that background. Also there is an ABR Lab Exercise if you want some hands on learning with ABR that will show you visually some of the items discussed below. Here, I wanted to dive a little
Mapping ABR to TCP Congestion Control and QUIC Read More »
Post Views: 2,060 Let’s just start right out and say: contrary to the scare tactics made by some, that MPLS traffic has been exposed by the providers that operate MPLS, there has never been any validated evidence that such a breach has indeed ever occurred, other than some alleged errors in configuration. MPLS operates between
MPLS – The Most Secure without Encryption Read More »
Post Views: 5,645 As QUIC has emerged to begin its takeover of the Transport Layer (OK – we will never see TCP totally disappear), I have written multiple articles on QUIC. You can look them over here. In the early days Google made this really easy right within the Chrome web browser. As time has
Troubleshooting QUIC Traffic – Not Easy Read More »
Post Views: 12,960 Back in 2018 (I think) I was becoming increasingly aware of the QUIC protocol in my and other’s packet captures and I immediately dug in and wrote about it. As of recent data (now Feb 2025), QUIC (Quick UDP Internet Connections) is experiencing significant adoption across the internet. Websites have implemented QUIC,
An update on QUIC Adoption and traffic levels Read More »
Post Views: 3,871 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: 11,729 1 Day Instructor Led Technology Overview/Briefing Available in either Web Based Delivery or On-Site DeliveryWeb Based Delivery: Max class size is 50On Site Delivery: Max class size is 30 Course Description: Google introduced one of the most significant changes to the Layered Model of telecommunications when it introduced QUIC (see our articles
CSI-TB-007 – QUIC Redefines the Transport Layer – A Technical Overview/Briefing Read More »
Post Views: 13,838 CellStream, Inc. – Telecom Consulting and Training! 1-Day Instructor Led Hands On Lab Class Available in either Web Based delivery or On-Site Delivery Minimum 8 students – Maximum 16 students What Students are saying about this class:wireshark “[The instructor] explains things in a way that any of us can understand.” “Seeing scenarios
CSI-HO-020-M – Wireshark QUIC Analysis in a Day – 1 Day Read More »
Post Views: 2,023 We started to notice QUIC back in 2017. For an overview of QUIC you can see my article here: https://www.cellstream.com/2018/03/07/is-there-a-lot-of-quic-in-your-packet-captures/ How do you know if a given web site uses QUIC/gQUIC? It is a great question, and can be easily answered if you are using Google Chrome (which, by now you should
How To Observe if the Web Site you are Browsing Uses QUIC Read More »
Post Views: 1,762 We have previously published two articles on Google’s QUIC protocol (note: Google originally called this protocol “QUIC” as you can tell by the original logo, but now that original version is referred to as gQUIC, whereas the IETF has chosen to call the newer version they are working on as “QUIC” –
How much QUIC Traffic is there? Read More »
Post Views: 1,922 Have you noticed a lot of QUIC protocol in your packet captures? I certainly have, and we had better talk about what this is. What is QUIC (now more recently called gQUIC)? QUIC is a new protocol created by the fine folks at Google. It stands for Google Quick UDP Internet Connections.
Is there a lot of QUIC in your Packet Captures? Read More »
Post Views: 11,029 As explained in our prior article on QUIC, you may be seeing a lot of QUIC traffic in your packet captures. Assuming you have read that article, and understand that all QUIC traffic is encrypted, you know the only way was to see some of the details is using Chrome itself. Today
Using Wireshark to Analyze QUIC Traffic Read More »
