Fragmentation

One of the discussion topics at the recent ICANN 75 meeting was an old favourite of mine, namely the topic of Internet Fragmentation. Here, I’d like to explore this topic in a little more detail and look behind the kneejerk response of declaiming fragmentation as bad under any and all…


A Second Look at QUIC Use

A couple of months ago, in July 2022, I wrote about our work in measuring the level of use of QUIC in the Internet (https://www.potaroo.net/ispcol/2022-07/quic.html). Getting this measurement “right” has been an interesting exercise, and it’s been a learning experience that I’d like to relate here. We’ll start from the…


A look at QUIC Use

Quick UDP Internet Connection (QUIC) is a network protocol initially developed and deployed by Google, and recently (May 2021) standardized in the Internet Engineering Task Force (IETF) (RFC 9000). In this article we’ll take a quick tour of QUIC and then look at the extent to which QUIC is being…


Using LEOs and GEOs

Once you head away from the areas that are serviced by modern terrestrial cable infrastructure, the available digital communications options are somewhat limited. Some remote areas are served using High Frequency radio systems, using radio signals that bounce off the ionosphere to provide a long distance, but limited bandwidth, service.…


Fifty Years On

When did the Internet begin? It all gets a bit hazy after so many years, but by the early 1970’s research work in packet switched networks was well underway and while it wasn’t running TCP at the time (the flag day when the ARPANET switched over to use TCP was…


IAB Workshop on Measuring Network Quality for End Users

The telephone network had a remarkably clear overriding service objective: It had to sustain a human conversation. Now this must be able to carry a signal which is a human voice. To be discernible to human listeners, its necessary to carry audio frequencies of between 300 and 3,500 Hz. Most…


Transport vs Network

One of the basic tools in network design is the so-called “stacked” protocol model. This model was developed in the late 1970s as part of a broader effort to develop general standards and methods of networking. In 1983, the efforts of the CCITT and ISO were merged to form The…


An IPv6 Update for 2020

The Australian Domain Name Administration, AUDA, has recently published its quarterly report for the last quarter of 2020. The report contained the interesting snippet: “The rapid digitisation of our lives and economy – necessitated by COVID-19 – continued to underpin strong growth in .au registrations. New .au domains created in…


Measuring IPv6

It’s now the season of virtual workshops, and without the overhead of time spent travelling to these events it’s been possible to participate in a number of these events all over the Internet in the space of a few days. This week I participated in a workshop on measurement of…


New IP and Emerging Communications Technologies

A “New IP” framework was proposed to the ITU last year . This framework envisages a resurgence of a network-centric view of communications architectures where application behaviours are moderated by network-managed control mechanisms. It’s not the first time that we’ve seen proposals to rethink the basic architecture of the Internet’s…