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…


Addressing 2019

Time for another annual roundup from the world of IP addresses. Let’s see what has changed in the past 12 months in addressing the Internet and look at how IP address allocation information can inform us of the changing nature of the network itself. Back around 1992 the IETF gazed…


Sizing the Buffer

Packet switched networks benefit from buffers within the network’s switches. In the simplest case, if two packets arrive at a switch at the same time and are destined to the same output port, then one packet will need to wait in a buffer while the other packet is sent on,…