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During the recent IETF meeting it was pointed out to me that we got it all wrong when we called the end-to-end transport flow control algorithms “congestion control,” as this was a term with negative connotations about the network and the quality of the user experience. If we had called…
There has been a fundamental change in the architecture of service and content delivery over the Internet over the past decade. Instead of using the network to bring the remote user to a server that delivers the content or service, the content (or service) is loaded into one or more…
The choice of UDP as the default transport for the DNS was not a completely unqualified success. On the positive side, the stateless query/response model of UDP has been a good fit to the stateless query/response model of DNS transactions between a client and a server. The use of a…
The DNS is a crucial part of today’s Internet. With the fracturing of the network’s address space as a byproduct of IPv4 address run down and the protracted IPv6 transition the Internet’s name space is now the defining attribute of the Internet that makes it one network. However, the DNS…
RIPE 88 was held in May 2024 at Krakow, Poland. Here’s as summary of some of the routing topics that were presented at that meeting that I found to be of interest. Bgpipe – A BGP Reverse Proxy Observing and measuring the dynamic behaviour of BGP has used a small…
RIPE 88 was held in May 2024 at Krakow, Poland. Here’s as summary of some of the the DNS topics that were presented at that meeting that I found to be of interest. DNSSEC Bootstrapping How can you start up a DNSSEC relationship between the parent zone and the delegated…
There have been quite a few Internet technologies which have not been enthusiastically adopted from the outset. In many cases the technology has been quietly discarded in favour of the next innovation, but in some cases the technology just refuses to go away and sits in a protracted state of…
Digital communications systems always represent a collection of design trade-offs. Maximising one characteristic of a system may impair others, and various communications services may chose to optimise different performance parameters based on the intersection these design decisions with the physical characteristics of the communications medium. In this article I’ll look…
The topic of address plans for IPv6 has had a rich and varied history. From the very early concepts of “it’s just like IPv4, only with a 128-bit address field”, through the models of “Aggregation Identifiers” and the hierarchy of “Top-Level,” “Next-Level” and “Site-Level” defined in RFC 2373 from July…
I had the opportunity to participate in the New Zealand Network Operators Group meeting (NZNOG) in Nelson earlier this month. This article was prompted by a presentation from Josh Simpson on an .nz service outage incident in May 2023. I guess we’ve become used to reading evasive and vague outage…
